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docs/PRD.md
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docs/PRD.md
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# KNEL-Football Secure OS - Product Requirements Document (PRD)
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**Version:** 1.0
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**Status:** Active
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**Copyright:** © 2026 Known Element Enterprises LLC
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**License:** GNU Affero General Public License v3.0 only
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**Last Updated:** 2026-01-29
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---
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## Executive Summary
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KNEL-Football Secure OS is a hardened Debian 13 Linux distribution designed for secure tier0 infrastructure access. The system implements a defense-in-depth security architecture with full disk encryption as a mandatory requirement, ensuring data protection against physical access attacks and unauthorized disclosure.
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### Key Differentiators
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- **Mandatory Full Disk Encryption (FDE)** - LUKS-based encryption for all system storage
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- **Network Isolation** - VPN-only access with WireGuard
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- **Minimal Attack Surface** - Only essential services and applications
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- **Hardware Disabled** - WiFi and Bluetooth permanently disabled
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- **Immutable Configuration** - Package management disabled by default
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- **Privacy-Focused** - No telemetry, no user data collection
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### System Architecture
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**IMPORTANT CLARIFICATION**: KNEL-Football OS serves as a **secure remote terminal** for accessing tier0 infrastructure. It does NOT directly access tier0 infrastructure itself.
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**Architecture**:
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```
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┌─────────────────┐
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│ KNEL-Football OS│ ← Secure workstation with FDE
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│ (Remote Terminal)│
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└────────┬──────────┘
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│
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│ SSH/WireGuard
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│
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▼
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┌─────────────────┐
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│ Privileged Access │ ← Physical workstation in secure facility
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│ Workstation │
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└────────┬──────────┘
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│
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│ Direct Access
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│
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▼
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┌─────────────────┐
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│ Tier0 Network │ ← Protected infrastructure
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│ Infrastructure│
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└─────────────────┘
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```
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**Access Model**:
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1. User boots KNEL-Football OS on secure laptop (FDE required)
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2. OS connects via WireGuard VPN to secure network
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3. User uses SSH/Remmina to access privileged workstation
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4. Privileged workstation (physical) accesses tier0 infrastructure
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5. No direct tier0 access from KNEL-Football OS
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This creates a **two-factor security model**:
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- **Factor 1**: Physical possession of KNEL-Football OS workstation
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- **Factor 2**: Access to privileged workstation in secure facility
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---
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## Product Vision
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To provide the most secure, compliant, and user-friendly operating system for tier0 infrastructure access, protecting sensitive data and systems through comprehensive encryption, network isolation, and defense-in-depth security controls.
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---
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## Product Scope
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### In Scope
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- Full disk encryption (LUKS) for all storage devices
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- Debian 13 base system with security hardening
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- IceWM desktop environment
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- WireGuard VPN client with QR code import
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- Network firewall with default-deny policy
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- SSH server with key-based authentication
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- USB device automount with restrictions
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- Automated ISO build process
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- Comprehensive security testing suite
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### Out of Scope
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- General-purpose computing applications
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- Internet browsing capabilities
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- Application package manager
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- Wireless networking support
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- Bluetooth support
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- Cloud storage integration
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- Multi-user support (single-user system)
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---
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## Functional Requirements
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### FR-001: Full Disk Encryption (MANDATORY)
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**Priority:** P0 (Critical)
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**Status:** Required
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**Description:**
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The system MUST implement full disk encryption using LUKS (Linux Unified Key Setup) to protect all data at rest. Encryption must be mandatory and cannot be bypassed during installation.
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**Requirements:**
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1. **LUKS2 Format** - Use LUKS2 with Argon2id key derivation
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2. **AES-XTS Encryption** - AES-256-XTS cipher with 512-bit key size
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3. **Boot Partition Encryption** - Root filesystem must be encrypted
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4. **Separate Boot Partition** - Unencrypted /boot for bootloader (UEFI requirement)
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5. **Key Recovery** - Support for multiple passphrases/key slots
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6. **Integrity Protection** - Authenticated encryption or dm-integrity layer
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7. **Secure Key Storage** - No plaintext keys stored anywhere on the system
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**Encryption Passphrase Requirements (MANDATORY):**
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- **Minimum Length**: 14 characters (20+ characters strongly recommended)
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- **Character Classes**: Minimum 3 of 4 required:
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- Uppercase letters (A-Z) - At least 1 required
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- Lowercase letters (a-z) - At least 1 required
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- Digits (0-9) - At least 1 required
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- Special characters (!@#$%^&*) - At least 1 required
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- **Prohibited Patterns**:
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- No common words (password, secret, admin, root, etc.)
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- No sequential characters (123, abc, qwerty)
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- No repeated characters (maximum 2 consecutive)
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- **Security Notes**:
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- Passphrase is required at EVERY system boot
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- No backdoor or recovery mechanism without valid passphrase
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- Loss of passphrase = permanent data loss
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- Store passphrase in secure password manager
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**Installation Behavior:**
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- Installer MUST prompt for encryption passphrase
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- Passphrase MUST meet complexity requirements above
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- System CANNOT be installed without encryption
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- Installer MUST verify passphrase strength where possible
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- System CANNOT boot without correct passphrase
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- Installer SHOULD create key backup option (recommended)
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**Implementation Details:**
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```
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/dev/sda1 512M EFI System Partition (ESP)
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/dev/sda2 512M /boot (ext4, unencrypted)
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/dev/sda3 Remainder LUKS2 encrypted partition
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└─ cryptroot AES-256-XTS / (ext4)
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```
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**Installation Behavior:**
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- Installer MUST prompt for encryption passphrase
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- Passphrase MUST be 14+ characters with complexity requirements
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- System CANNOT be installed without encryption
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- Installer MUST verify passphrase strength
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- Installer MUST create key backup option (recommended)
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**Security Properties:**
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- Data unreadable without correct passphrase
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- No backdoors or recovery mechanisms by default
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- Protected against cold boot attacks
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- Protected against disk imaging attacks
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- Compliant with NIST SP 800-111
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### FR-002: Operating System Base
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**Priority:** P0
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**Status:** Required
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**Requirements:**
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1. **Base Distribution** - Debian 13 (Trixie) Testing
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2. **Architecture** - AMD64 (x86_64) only
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3. **Kernel** - Latest stable kernel with security patches
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4. **Security Patches** - All available security patches applied
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5. **Minimal Packages** - Only essential packages installed
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### FR-003: Desktop Environment
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**Priority:** P1
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**Status:** Required
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**Requirements:**
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1. **Window Manager** - IceWM (minimal resource footprint)
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2. **Display Manager** - LightDM with privacy mode
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3. **Theme** - Dark, privacy-focused theme
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4. **Applications** - Remmina (remote desktop), Mousepad (text editor)
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**Privacy Features:**
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- Hide usernames in login screen
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- Disable guest account
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- Disable auto-login
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- Disable user list display
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### FR-004: Network Isolation
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**Priority:** P0
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**Status:** Required
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**Requirements:**
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1. **WireGuard VPN** - Required for all network access
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2. **No Direct Internet** - All traffic through VPN tunnel
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3. **Firewall Rules** - Default deny, specific allow rules
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4. **QR Code Import** - Easy VPN configuration import
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5. **Dynamic Firewall** - Rules adapt to VPN endpoints
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**Allowed Traffic:**
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- WireGuard VPN traffic to configured endpoints
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- DNS through VPN tunnel only
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- Outbound through VPN interface only
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### FR-005: Hardware Control
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**Priority:** P0
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**Status:** Required
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**Requirements:**
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1. **WiFi Disabled** - Permanently disabled via kernel module blacklist
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2. **Bluetooth Disabled** - Permanently disabled via kernel module blacklist
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3. **USB Restricted** - Controlled automount with security restrictions
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4. **No Wireless Cards** - System should not have wireless hardware
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**Blacklisted Modules:**
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- WiFi: rtl*, iwl*, ath*, brcm*, mwifi*, rt2*
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- Bluetooth: btusb, bluetooth
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### FR-006: SSH Access
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**Priority:** P1
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**Status:** Required
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**Requirements:**
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1. **Key-Based Authentication** - Only SSH keys (no passwords)
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2. **WireGuard Keys** - Pre-configured WireGuard key pairs
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3. **Root Login Disabled** - No direct root SSH access
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4. **Custom SSH Port** - Non-standard port (configurable)
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5. **Key Management** - Secure key storage and rotation
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### FR-007: System Hardening
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**Priority:** P0
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**Status:** Required
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**Requirements:**
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1. **Password Policy** - 14+ character minimum, complexity required
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2. **Audit Logging** - Comprehensive system activity logging
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3. **Resource Limits** - Prevent resource exhaustion attacks
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4. **Service Hardening** - Disable unnecessary services
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5. **Kernel Parameters** - Secure kernel parameter tuning
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**Disabled Services:**
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- avahi-daemon (zeroconf)
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- cups (printing)
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- bluetooth service
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- NetworkManager (managed via scripts)
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### FR-008: USB Device Handling
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**Priority:** P1
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**Status:** Required
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**Requirements:**
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1. **Automount Support** - Automatic USB device mounting
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2. **Restricted Permissions** - No auto-execution
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3. **User Mount Points** - /media/username/device
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4. **Filesystem Support** - FAT32, exFAT, NTFS, ext4
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5. **Audit Logging** - Track USB device insertion/removal
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**Security Restrictions:**
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- No automatic program execution
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- No symbolic links from USB
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- No device special files from USB
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- Read-only mode for untrusted USB (optional)
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### FR-009: System Immutability
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**Priority:** P1
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**Status:** Required
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**Requirements:**
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1. **Package Management Disabled** - No apt/dpkg commands for users
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2. **Immutable Configuration** - Critical files have immutable attributes
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3. **No Auto-Updates** - Updates via ISO rebuild only
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4. **Configuration Tracking** - Detect configuration tampering
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**Protected Directories:**
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- /etc (system configuration)
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- /usr (system binaries)
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- /boot (bootloader)
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- /bin, /sbin (essential binaries)
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### FR-010: ISO Build Process
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**Priority:** P1
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**Status:** Required
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**Requirements:**
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1. **Reproducible Builds** - Identical outputs from identical inputs
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2. **Docker-Based** - All build operations in Docker containers
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3. **Checksum Verification** - SHA256 and MD5 checksums for ISO
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4. **Build Logging** - Complete build audit trail
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5. **Automated Testing** - Comprehensive test suite execution
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**Build Artifacts:**
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- ISO image (~1-2 GB)
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- SHA256 checksum file
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- MD5 checksum file
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- Build report (optional)
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---
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## Non-Functional Requirements
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### NFR-001: Security
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**Priority:** P0
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**Requirements:**
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- Full disk encryption (LUKS2, AES-256-XTS)
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- Defense-in-depth architecture
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- Zero-trust network model
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- Compliance with security frameworks (NIST, ISO 27001)
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- No backdoors or secret keys
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### NFR-002: Performance
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**Priority:** P2
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**Requirements:**
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- Boot time < 60 seconds (including LUKS passphrase prompt)
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- Disk I/O overhead < 5% with encryption
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- Memory usage < 2 GB at idle
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- CPU usage < 5% at idle
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### NFR-003: Reliability
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**Priority:** P1
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**Requirements:**
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- Mean time between failures (MTBF) > 720 hours
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- Graceful degradation on errors
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- Comprehensive error handling
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- Automatic recovery where possible
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### NFR-004: Usability
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**Priority:** P1
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**Requirements:**
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- Intuitive installation process
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- Clear error messages
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- Comprehensive documentation
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- Minimal training required
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### NFR-005: Maintainability
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**Priority:** P1
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**Requirements:**
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- Clean code structure
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- Comprehensive testing
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- Well-documented configuration
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- Automated build and deployment
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||||
### NFR-006: Compliance
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**Priority:** P0
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**Requirements:**
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- NIST SP 800-53 (Security Controls)
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- NIST SP 800-111 (Disk Encryption)
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- ISO/IEC 27001 (Information Security)
|
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- CIS Benchmarks for Debian Linux
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- DISA STIG for Linux
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||||
---
|
||||
|
||||
## Security Architecture
|
||||
|
||||
### Encryption Layer
|
||||
|
||||
#### Full Disk Encryption (FDE)
|
||||
- **Cipher:** AES-256-XTS
|
||||
- **Key Size:** 512 bits
|
||||
- **Mode:** LUKS2
|
||||
- **KDF:** Argon2id (PBKDF2 fallback)
|
||||
- **Integrity:** dm-integrity layer (optional)
|
||||
|
||||
#### Key Management
|
||||
- Primary: User passphrase (required during boot)
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||||
- Recovery: Optional key slot for emergency recovery
|
||||
- Storage: Keys never stored in plaintext
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||||
- Rotation: Key change support via cryptsetup
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||||
|
||||
### Network Security Layer
|
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||||
#### VPN-Only Access
|
||||
- **Protocol:** WireGuard
|
||||
- **Encryption:** ChaCha20-Poly1305
|
||||
- **Authentication:** Public/private key pairs
|
||||
- **Configuration:** Dynamic endpoint-based firewall rules
|
||||
|
||||
#### Firewall Rules
|
||||
```
|
||||
Default Policy: DROP
|
||||
|
||||
Inbound Rules:
|
||||
- SSH from VPN interface only (key-based auth)
|
||||
- Established/related connections allowed
|
||||
|
||||
Outbound Rules:
|
||||
- WireGuard VPN traffic to endpoints
|
||||
- DNS through VPN tunnel only
|
||||
- All traffic through VPN interface only
|
||||
```
|
||||
|
||||
### System Security Layer
|
||||
|
||||
#### Kernel Hardening
|
||||
- Module blacklisting (WiFi, Bluetooth)
|
||||
- Secure kernel parameters
|
||||
- Restricted ptrace scope
|
||||
- Kernel address space layout randomization (KASLR)
|
||||
|
||||
#### Process Security
|
||||
- Resource limits (ulimits)
|
||||
- Service hardening (systemd sandboxing)
|
||||
- Mandatory access control (optional SELinux/AppArmor)
|
||||
|
||||
### Access Control Layer
|
||||
|
||||
#### Authentication
|
||||
- **Password Policy:** 14+ characters, complexity required
|
||||
- **SSH:** Key-based only (no password auth)
|
||||
- **Root Login:** Disabled via SSH
|
||||
- **Sudo:** Limited sudo access for authorized users
|
||||
|
||||
#### Authorization
|
||||
- **User Groups:** Minimal necessary groups only
|
||||
- **File Permissions:** Secure default permissions
|
||||
- **Sudo Configuration:** Specific command permissions
|
||||
- **Audit Logging:** Track all privilege usage
|
||||
|
||||
---
|
||||
|
||||
## Data Requirements
|
||||
|
||||
### DR-001: Data at Rest
|
||||
|
||||
**Priority:** P0
|
||||
**Requirements:**
|
||||
- All system data encrypted at rest (LUKS2)
|
||||
- Encryption key protected by user passphrase
|
||||
- No plaintext data storage
|
||||
- Secure deletion of temporary files
|
||||
|
||||
### DR-002: Data in Transit
|
||||
|
||||
**Priority:** P0
|
||||
**Requirements:**
|
||||
- All network traffic encrypted via VPN
|
||||
- SSH encryption for remote access
|
||||
- TLS for any HTTPS traffic (if applicable)
|
||||
- No plaintext protocols allowed
|
||||
|
||||
### DR-003: Data Retention
|
||||
|
||||
**Priority:** P2
|
||||
**Requirements:**
|
||||
- Log retention: 90 days minimum
|
||||
- User data: User-controlled
|
||||
- System data: Until reinstallation
|
||||
- Secure wipe on decommission
|
||||
|
||||
---
|
||||
|
||||
## User Requirements
|
||||
|
||||
### UR-001: Target Users
|
||||
|
||||
1. **Tier0 Infrastructure Engineers** - Primary users
|
||||
2. **System Administrators** - Secondary users
|
||||
3. **Security Auditors** - Compliance verification users
|
||||
|
||||
### UR-002: User Scenarios
|
||||
|
||||
**Scenario 1: Initial System Installation**
|
||||
1. Boot ISO on target hardware
|
||||
2. Configure disk encryption passphrase
|
||||
3. Complete automated installation
|
||||
4. Reboot into encrypted system
|
||||
5. Configure WireGuard VPN
|
||||
|
||||
**Scenario 2: Daily System Use**
|
||||
1. System prompts for encryption passphrase at boot
|
||||
2. User logs in (username/password)
|
||||
3. VPN automatically connects
|
||||
4. User accesses infrastructure via SSH/Remmina
|
||||
|
||||
**Scenario 3: USB Data Transfer**
|
||||
1. User inserts USB device
|
||||
2. System automatically mounts to /media/username/device
|
||||
3. User copies files to/from USB
|
||||
4. User safely removes USB device
|
||||
|
||||
**Scenario 4: VPN Configuration**
|
||||
1. User scans QR code with camera
|
||||
2. System imports WireGuard configuration
|
||||
3. Firewall rules updated automatically
|
||||
4. VPN connection established
|
||||
|
||||
### UR-003: User Interface Requirements
|
||||
|
||||
**Login Screen:**
|
||||
- Display system name only
|
||||
- No user list (privacy mode)
|
||||
- Require username entry
|
||||
- Require password entry
|
||||
- No guest account option
|
||||
|
||||
**Desktop Environment:**
|
||||
- Minimal interface (IceWM)
|
||||
- Application launcher
|
||||
- System tray (VPN status indicator)
|
||||
- Terminal access
|
||||
- No unnecessary widgets
|
||||
|
||||
---
|
||||
|
||||
## Technical Requirements
|
||||
|
||||
### TR-001: System Requirements
|
||||
|
||||
**Minimum Hardware:**
|
||||
- CPU: x86_64 (AMD64), 2 cores
|
||||
- RAM: 4 GB (8 GB recommended)
|
||||
- Storage: 64 GB SSD (128 GB recommended)
|
||||
- Network: Ethernet (1 Gbps recommended)
|
||||
- UEFI: UEFI 2.3+ firmware
|
||||
|
||||
**Recommended Hardware:**
|
||||
- CPU: x86_64 (AMD64), 4+ cores
|
||||
- RAM: 8 GB
|
||||
- Storage: 256 GB NVMe SSD
|
||||
- Network: Ethernet 10 Gbps
|
||||
- UEFI: UEFI 2.7+ with Secure Boot
|
||||
|
||||
**Unsupported Hardware:**
|
||||
- 32-bit systems (x86, ARM32)
|
||||
- Legacy BIOS systems
|
||||
- Systems without UEFI firmware
|
||||
- Systems with < 4 GB RAM
|
||||
- Systems with < 64 GB storage
|
||||
|
||||
### TR-002: Software Requirements
|
||||
|
||||
**Included Software:**
|
||||
- Debian 13 base system
|
||||
- Linux kernel (latest stable)
|
||||
- IceWM window manager
|
||||
- LightDM display manager
|
||||
- WireGuard and tools
|
||||
- OpenSSH server
|
||||
- nftables firewall
|
||||
- Remmina (remote desktop)
|
||||
- Mousepad (text editor)
|
||||
- zbar-tools (QR code scanning)
|
||||
|
||||
**Excluded Software:**
|
||||
- Package managers (apt/dpkg for users)
|
||||
- Wireless drivers and tools
|
||||
- Bluetooth stack
|
||||
- Printing system (CUPS)
|
||||
- Cloud storage clients
|
||||
- Media players
|
||||
- Web browsers
|
||||
|
||||
### TR-003: Encryption Requirements
|
||||
|
||||
**LUKS2 Configuration:**
|
||||
- Cipher: aes-xts-plain64
|
||||
- Key size: 512 bits (256-bit keys for XTS)
|
||||
- Hash: SHA-512
|
||||
- KDF: Argon2id (with appropriate iterations)
|
||||
- Salt size: 512 bits
|
||||
- Key slots: 8 maximum (default: 1 used)
|
||||
|
||||
**Partition Layout (UEFI):**
|
||||
```
|
||||
/dev/sda1 512M EFI System Partition (FAT32)
|
||||
/dev/sda2 512M /boot (ext4, unencrypted)
|
||||
/dev/sda3 Remainder LUKS2 encrypted container
|
||||
└─ cryptroot (mapped device) / (ext4)
|
||||
```
|
||||
|
||||
**Boot Process:**
|
||||
1. UEFI firmware loads GRUB from EFI System Partition
|
||||
2. GRUB loads kernel and initramfs from /boot
|
||||
3. initramfs prompts for encryption passphrase
|
||||
4. LUKS container unlocked with passphrase
|
||||
5. Root filesystem mounted
|
||||
6. System boots normally
|
||||
|
||||
---
|
||||
|
||||
## Compliance Requirements
|
||||
|
||||
### CR-001: Regulatory Compliance
|
||||
|
||||
**NIST SP 800-53 (Security and Privacy Controls)**
|
||||
- AC-2: Account Management
|
||||
- AC-3: Access Enforcement
|
||||
- AC-6: Least Privilege
|
||||
- AU-2: Audit Events
|
||||
- AU-3: Content of Audit Records
|
||||
- AU-6: Audit Review, Analysis, and Reporting
|
||||
- CM-3: Configuration Change Control
|
||||
- CM-7: Least Functionality
|
||||
- CM-8: System Components Inventory
|
||||
- CP-7: Alternate Storage Site
|
||||
- CP-9: System Backup
|
||||
- CP-10: Information System Recovery and Reconstitution
|
||||
- IA-2: Identification and Authentication
|
||||
- IA-5: Authenticator Management
|
||||
- SC-8: Transmission Confidentiality and Integrity
|
||||
- SC-12: Cryptographic Key Establishment and Management
|
||||
- SC-13: Cryptographic Protection
|
||||
- SC-28: Protection of Information at Rest
|
||||
|
||||
**NIST SP 800-111 (Guide to Storage Encryption)**
|
||||
- Full disk encryption implementation
|
||||
- Cryptographic algorithm selection
|
||||
- Key management procedures
|
||||
- Authentication requirements
|
||||
|
||||
**ISO/IEC 27001:2013 (Information Security)**
|
||||
- A.9 Access Control
|
||||
- A.10 Cryptography
|
||||
- A.12 Operations Security
|
||||
- A.14 System Acquisition, Development, and Maintenance
|
||||
|
||||
**CIS Benchmarks for Debian Linux**
|
||||
- Initial setup guidelines
|
||||
- Logging and monitoring
|
||||
- Network configuration
|
||||
- System access, authentication, and authorization
|
||||
|
||||
**DISA STIG for Linux**
|
||||
- Firewall configuration
|
||||
- System services configuration
|
||||
- File permissions and ownership
|
||||
|
||||
### CR-002: Security Compliance
|
||||
|
||||
**Encryption Standards:**
|
||||
- FIPS 140-2 Level 1 (certified algorithms)
|
||||
- FIPS 197 (AES encryption)
|
||||
- FIPS 180-4 (SHA hash functions)
|
||||
- FIPS 202 (SHA-3 hash functions)
|
||||
|
||||
**Cryptographic Protocols:**
|
||||
- TLS 1.3 (for any HTTPS)
|
||||
- WireGuard protocol (VPN)
|
||||
- SSH-2 protocol
|
||||
|
||||
**Key Management:**
|
||||
- Secure key generation (CSPRNG)
|
||||
- Secure key storage
|
||||
- Key rotation support
|
||||
- Secure key destruction
|
||||
|
||||
---
|
||||
|
||||
## Testing Requirements
|
||||
|
||||
### TST-001: Unit Testing
|
||||
|
||||
**Coverage:**
|
||||
- All security hardening scripts
|
||||
- Configuration generation scripts
|
||||
- Key management functions
|
||||
- Firewall rule generation
|
||||
|
||||
**Test Cases:**
|
||||
- WiFi/Bluetooth module blacklisting verification
|
||||
- SSH configuration validation
|
||||
- Firewall rule validation
|
||||
- Password policy enforcement
|
||||
|
||||
### TST-002: Integration Testing
|
||||
|
||||
**Test Scenarios:**
|
||||
- Complete ISO build process
|
||||
- Installation in virtual machine
|
||||
- Encryption setup and verification
|
||||
- VPN configuration and connectivity
|
||||
- USB device handling
|
||||
|
||||
### TST-003: Security Testing
|
||||
|
||||
**Test Areas:**
|
||||
- Full disk encryption verification
|
||||
- Network isolation testing
|
||||
- Firewall rule validation
|
||||
- Authentication mechanism testing
|
||||
- Privilege escalation prevention
|
||||
|
||||
### TST-004: Compliance Testing
|
||||
|
||||
**Validation:**
|
||||
- NIST SP 800-53 control coverage
|
||||
- NIST SP 800-111 encryption guidelines
|
||||
- CIS Benchmark compliance
|
||||
- Security configuration validation
|
||||
|
||||
### TST-005: Performance Testing
|
||||
|
||||
**Metrics:**
|
||||
- Boot time with encryption
|
||||
- Disk I/O performance impact
|
||||
- Memory usage at idle
|
||||
- Network throughput over VPN
|
||||
|
||||
---
|
||||
|
||||
## Quality Assurance
|
||||
|
||||
### QA-001: Code Quality
|
||||
|
||||
**Standards:**
|
||||
- Shell scripts: Shellcheck compliant
|
||||
- Configuration: Follow Debian conventions
|
||||
- Documentation: Clear and complete
|
||||
- Version control: Git with meaningful commits
|
||||
|
||||
### QA-002: Build Quality
|
||||
|
||||
**Requirements:**
|
||||
- Reproducible builds
|
||||
- Clean build logs
|
||||
- No build warnings
|
||||
- Automated checksum verification
|
||||
|
||||
### QA-003: Release Quality
|
||||
|
||||
**Criteria:**
|
||||
- All tests passing
|
||||
- Security scan clean
|
||||
- Documentation complete
|
||||
- Signed release artifacts
|
||||
|
||||
---
|
||||
|
||||
## Documentation Requirements
|
||||
|
||||
### DOC-001: User Documentation
|
||||
|
||||
**Required Documents:**
|
||||
1. User Manual (installation and daily use)
|
||||
2. Troubleshooting Guide
|
||||
3. Security Configuration Guide
|
||||
4. VPN Configuration Guide
|
||||
|
||||
### DOC-002: Technical Documentation
|
||||
|
||||
**Required Documents:**
|
||||
1. System Architecture Documentation
|
||||
2. Security Model Documentation
|
||||
3. Build Process Documentation
|
||||
4. API/Configuration Documentation
|
||||
|
||||
### DOC-003: Developer Documentation
|
||||
|
||||
**Required Documents:**
|
||||
1. Contributor Guidelines
|
||||
2. Code Style Guide
|
||||
3. Testing Guidelines
|
||||
4. Release Process Documentation
|
||||
|
||||
### DOC-004: Compliance Documentation
|
||||
|
||||
**Required Documents:**
|
||||
1. Security Control Implementation Guide
|
||||
2. Compliance Matrix (NIST, ISO, CIS)
|
||||
3. Risk Assessment Report
|
||||
4. Penetration Test Reports
|
||||
|
||||
---
|
||||
|
||||
## Deployment Requirements
|
||||
|
||||
### DEP-001: Distribution
|
||||
|
||||
**Distribution Methods:**
|
||||
- ISO image download (official website)
|
||||
- Secure distribution (HTTPS, verified checksums)
|
||||
- GPG signature verification
|
||||
- Release announcement channels
|
||||
|
||||
### DEP-002: Installation
|
||||
|
||||
**Installation Methods:**
|
||||
- USB bootable media (recommended)
|
||||
- Virtual machine deployment (testing)
|
||||
- Automated installation (preseed configuration)
|
||||
- Manual installation (expert mode)
|
||||
|
||||
**Installation Requirements:**
|
||||
- UEFI firmware (mandatory)
|
||||
- 64-bit AMD64 architecture
|
||||
- Minimum 64 GB storage
|
||||
- Minimum 4 GB RAM
|
||||
- Ethernet network interface
|
||||
|
||||
### DEP-003: Updates
|
||||
|
||||
**Update Strategy:**
|
||||
- Major updates: New ISO release
|
||||
- Security patches: New ISO release
|
||||
- Configuration changes: New ISO release
|
||||
- No in-place system updates
|
||||
|
||||
**Update Frequency:**
|
||||
- Major releases: Quarterly
|
||||
- Security releases: As needed
|
||||
- Emergency releases: Critical vulnerabilities only
|
||||
|
||||
---
|
||||
|
||||
## Risk Management
|
||||
|
||||
### RISK-001: Security Risks
|
||||
|
||||
**High Priority Risks:**
|
||||
1. **Encryption Bypass** - Attackers attempt to bypass encryption
|
||||
- Mitigation: LUKS2, strong passphrase, secure key management
|
||||
|
||||
2. **Physical Access** - Attackers gain physical access to hardware
|
||||
- Mitigation: Full disk encryption, secure boot, TPM (optional)
|
||||
|
||||
3. **VPN Compromise** - VPN endpoint or configuration compromised
|
||||
- Mitigation: Key rotation, endpoint hardening, audit logging
|
||||
|
||||
**Medium Priority Risks:**
|
||||
4. **USB Attacks** - Malicious USB devices inserted
|
||||
- Mitigation: Restricted mounting, no auto-execution, audit logging
|
||||
|
||||
5. **Privilege Escalation** - Users attempt to gain root access
|
||||
- Mitigation: Strong passwords, sudo restrictions, audit logging
|
||||
|
||||
6. **Configuration Drift** - System configuration modified
|
||||
- Mitigation: Immutable attributes, audit logging, compliance checks
|
||||
|
||||
### RISK-002: Operational Risks
|
||||
|
||||
**Risks:**
|
||||
- Lost encryption passphrase (data loss)
|
||||
- System corruption (reinstallation required)
|
||||
- Hardware failure (recovery procedures needed)
|
||||
- User error (documentation and training)
|
||||
|
||||
**Mitigations:**
|
||||
- Backup key slot recommendation
|
||||
- Comprehensive recovery documentation
|
||||
- Regular system backups (if applicable)
|
||||
- Clear user documentation
|
||||
|
||||
---
|
||||
|
||||
## Success Criteria
|
||||
|
||||
### SC-001: Technical Success
|
||||
|
||||
- Full disk encryption implemented and functional (MANDATORY)
|
||||
- ISO builds successfully (reproducible)
|
||||
- All tests passing (100% pass rate)
|
||||
- Security controls implemented (100% coverage)
|
||||
|
||||
### SC-002: Security Success
|
||||
|
||||
- Full disk encryption verified (LUKS2, AES-256-XTS)
|
||||
- Compliance achieved (NIST, ISO, CIS)
|
||||
- Security assessment passed (critical vulnerabilities = 0)
|
||||
- Penetration test passed (high-severity issues = 0)
|
||||
|
||||
### SC-003: Operational Success
|
||||
|
||||
- System boots within 60 seconds (with passphrase prompt)
|
||||
- Disk I/O overhead < 5% with encryption
|
||||
- User can complete common tasks without issues
|
||||
- Documentation is comprehensive and accurate
|
||||
|
||||
---
|
||||
|
||||
## Future Enhancements
|
||||
|
||||
### FE-001: Potential Enhancements
|
||||
|
||||
1. **TPM Integration** - Use TPM for passphrase storage (optional)
|
||||
2. **Smart Card Support** - Smart card-based authentication
|
||||
3. **Hardware Security Module (HSM)** - Enterprise key management
|
||||
4. **Trusted Platform Module (TPM)** - Boot attestation
|
||||
5. **Secure Boot** - Full secure boot chain verification
|
||||
6. **SELinux/AppArmor** - Mandatory access control
|
||||
7. **Multi-User Support** - Multiple user accounts (future consideration)
|
||||
8. **Automated Backup** - Encrypted backup solution
|
||||
9. **Remote Wipe** - Secure data destruction capability
|
||||
10. **Hardware Inventory** - Automatic hardware inventory tracking
|
||||
|
||||
### FE-002: Research Areas
|
||||
|
||||
1. **Alternative Encryption** - Evaluate dm-crypt with dm-integrity
|
||||
2. **Post-Quantum Cryptography** - Quantum-resistant algorithms
|
||||
3. **Hardware Enclaves** - Intel SGX or AMD SEV
|
||||
4. **Containerization** - Application-level isolation
|
||||
5. **Zero Trust Networking** - Enhanced zero-trust model
|
||||
|
||||
---
|
||||
|
||||
## Appendix A: Terminology
|
||||
|
||||
| Term | Definition |
|
||||
|------|------------|
|
||||
| FDE | Full Disk Encryption - Encryption of entire storage device |
|
||||
| LUKS | Linux Unified Key Setup - Disk encryption specification |
|
||||
| LUKS2 | Second version of LUKS with enhanced features |
|
||||
| AES-XTS | Advanced Encryption Standard in XEX-based Tweaked CodeBook mode |
|
||||
| KDF | Key Derivation Function - Derives encryption keys from password |
|
||||
| UEFI | Unified Extensible Firmware Interface - Modern firmware interface |
|
||||
| ESP | EFI System Partition - FAT32 partition for UEFI boot files |
|
||||
| VPN | Virtual Private Network - Encrypted network tunnel |
|
||||
| WireGuard | Modern, high-performance VPN protocol |
|
||||
| nftables | Linux packet filtering framework |
|
||||
| IceWM | Ice Window Manager - Lightweight window manager |
|
||||
| LightDM - Light Display Manager - Cross-desktop display manager |
|
||||
|
||||
---
|
||||
|
||||
## Appendix B: References
|
||||
|
||||
1. NIST SP 800-53: Security and Privacy Controls for Information Systems
|
||||
2. NIST SP 800-111: Guide to Storage Encryption Technologies for End User Devices
|
||||
3. ISO/IEC 27001:2013: Information Security Management Systems
|
||||
4. CIS Benchmarks: Center for Internet Security Security Configuration Guides
|
||||
5. DISA STIG: Defense Information Systems Agency Security Technical Implementation Guides
|
||||
6. LUKS Specification: https://gitlab.com/cryptsetup/LUKS2-docs
|
||||
7. WireGuard Protocol: https://www.wireguard.com/protocol/
|
||||
8. Debian Live Manual: https://live-team.pages.debian.net/live-manual/
|
||||
|
||||
---
|
||||
|
||||
## Appendix C: Change History
|
||||
|
||||
| Version | Date | Author | Changes |
|
||||
|---------|------|--------|---------|
|
||||
| 1.0 | 2026-01-28 | KNEL-Football Team | Initial PRD with mandatory full disk encryption |
|
||||
|
||||
---
|
||||
|
||||
**Copyright © 2026 Known Element Enterprises LLC**
|
||||
**License: GNU Affero General Public License v3.0 only**
|
||||
|
||||
This PRD is maintained as part of the KNEL-Football project and is updated when requirements change or new features are added.
|
||||
338
docs/SDLC.md
Normal file
338
docs/SDLC.md
Normal file
@@ -0,0 +1,338 @@
|
||||
# KNEL-Football Secure OS - Software Development Lifecycle (SDLC)
|
||||
|
||||
**Version:** 1.0
|
||||
**Status:** Active
|
||||
**Last Updated:** 2026-02-17
|
||||
|
||||
---
|
||||
|
||||
## Overview
|
||||
|
||||
This document defines the mandatory Software Development Lifecycle (SDLC) for the KNEL-Football Secure OS project. As a **critical infrastructure project** supporting CMMC/FedRAMP/ITAR compliance, we maintain zero tolerance for security defects and require strict adherence to these processes.
|
||||
|
||||
---
|
||||
|
||||
## Core Principles
|
||||
|
||||
### 1. Security First
|
||||
- Every change must preserve or enhance security
|
||||
- No shortcuts, no exceptions, no "temporary" bypasses
|
||||
- All code is security-critical code
|
||||
|
||||
### 2. Test-Driven Development (TDD)
|
||||
- **Red → Green → Refactor** - Mandatory workflow
|
||||
- No code without tests
|
||||
- No merge without passing tests
|
||||
|
||||
### 3. Defense in Depth
|
||||
- Multiple layers of verification
|
||||
- Automated + manual review
|
||||
- Build-time + runtime validation
|
||||
|
||||
---
|
||||
|
||||
## Test-Driven Development (TDD) Workflow
|
||||
|
||||
### Mandatory TDD Process
|
||||
|
||||
```
|
||||
┌─────────────────────────────────────────────────────────────┐
|
||||
│ TDD WORKFLOW │
|
||||
├─────────────────────────────────────────────────────────────┤
|
||||
│ │
|
||||
│ 1. RED: Write a failing test │
|
||||
│ ┌─────────────────────────────────────────────────┐ │
|
||||
│ │ • Write test FIRST (before implementation) │ │
|
||||
│ │ • Test MUST fail initially │ │
|
||||
│ │ • Run: ./run.sh test:<suite> │ │
|
||||
│ │ • Confirm test fails for RIGHT reason │ │
|
||||
│ └─────────────────────────────────────────────────┘ │
|
||||
│ ↓ │
|
||||
│ 2. GREEN: Write minimal code to pass │
|
||||
│ ┌─────────────────────────────────────────────────┐ │
|
||||
│ │ • Write MINIMUM code to make test pass │ │
|
||||
│ │ • Do not over-engineer │ │
|
||||
│ │ • Run: ./run.sh test:<suite> │ │
|
||||
│ │ • Confirm test passes │ │
|
||||
│ └─────────────────────────────────────────────────┘ │
|
||||
│ ↓ │
|
||||
│ 3. REFACTOR: Improve code quality │
|
||||
│ ┌─────────────────────────────────────────────────┐ │
|
||||
│ │ • Clean up implementation │ │
|
||||
│ │ • Remove duplication │ │
|
||||
│ │ • Improve readability │ │
|
||||
│ │ • Run: ./run.sh test (ALL tests must pass) │ │
|
||||
│ └─────────────────────────────────────────────────┘ │
|
||||
│ ↓ │
|
||||
│ REPEAT AS NEEDED │
|
||||
│ │
|
||||
└─────────────────────────────────────────────────────────────┘
|
||||
```
|
||||
|
||||
### TDD Rules
|
||||
|
||||
1. **Rule 1**: You MUST write a failing test before writing implementation code
|
||||
2. **Rule 2**: You MUST NOT write more implementation than needed to pass the test
|
||||
3. **Rule 3**: You MUST run ALL tests after refactoring
|
||||
|
||||
### Test Execution Commands
|
||||
|
||||
```bash
|
||||
# Run all tests
|
||||
./run.sh test
|
||||
|
||||
# Run specific test suites
|
||||
./run.sh test:unit # Unit tests only
|
||||
./run.sh test:integration # Integration tests only
|
||||
./run.sh test:security # Security/compliance tests only
|
||||
|
||||
# Run linting (shellcheck)
|
||||
./run.sh lint
|
||||
```
|
||||
|
||||
### Test Coverage Requirements
|
||||
|
||||
| Category | Minimum Coverage | Target |
|
||||
|----------|------------------|--------|
|
||||
| Security functions | 100% | 100% |
|
||||
| Encryption setup | 100% | 100% |
|
||||
| Password policy | 100% | 100% |
|
||||
| Firewall rules | 100% | 100% |
|
||||
| Build scripts | 80% | 95% |
|
||||
| Utility functions | 80% | 90% |
|
||||
|
||||
---
|
||||
|
||||
## Pre-Commit Checklist
|
||||
|
||||
**Before committing ANY change, verify:**
|
||||
|
||||
- [ ] All tests pass: `./run.sh test`
|
||||
- [ ] Lint passes with zero warnings: `./run.sh lint`
|
||||
- [ ] Security tests pass: `./run.sh test:security`
|
||||
- [ ] Code follows existing style
|
||||
- [ ] Commit message follows conventional format
|
||||
- [ ] No secrets, credentials, or sensitive data in commit
|
||||
|
||||
---
|
||||
|
||||
## Code Quality Standards
|
||||
|
||||
### Shell Script Standards
|
||||
|
||||
1. **Zero Shellcheck Warnings**
|
||||
- All shell scripts MUST pass shellcheck with zero warnings
|
||||
- No exceptions, no suppressions without documented justification
|
||||
- Run: `./run.sh lint`
|
||||
|
||||
2. **Strict Mode**
|
||||
- All scripts MUST use: `set -euo pipefail`
|
||||
- No uninitialized variables
|
||||
- No unset variable access
|
||||
|
||||
3. **Error Handling**
|
||||
- All errors must be handled explicitly
|
||||
- Use `|| true` only when failure is expected and acceptable
|
||||
- Log all errors with context
|
||||
|
||||
4. **Security Conventions**
|
||||
- Quote all variables: `"$variable"`
|
||||
- Use `[[ ]]` for tests (not `[ ]`)
|
||||
- Avoid `eval` and other code injection vectors
|
||||
- Never log secrets or credentials
|
||||
|
||||
### Documentation Standards
|
||||
|
||||
1. **Code Comments**
|
||||
- Explain WHY, not WHAT
|
||||
- Reference requirements (e.g., "PRD FR-006: Key-based auth only")
|
||||
- Document security implications
|
||||
|
||||
2. **Function Documentation**
|
||||
```bash
|
||||
# Function: configure_ssh
|
||||
# Purpose: Configure SSH server with security hardening
|
||||
# Requirements: PRD FR-006 (Key-Based Authentication Only)
|
||||
# Security: Disables password auth per NIST guidelines
|
||||
configure_ssh() {
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Git Workflow
|
||||
|
||||
### Branch Strategy
|
||||
|
||||
```
|
||||
main (protected)
|
||||
│
|
||||
├── feature/<feature-name> # New features
|
||||
├── fix/<bug-name> # Bug fixes
|
||||
├── security/<issue-name> # Security fixes (priority)
|
||||
└── docs/<doc-name> # Documentation updates
|
||||
```
|
||||
|
||||
### Commit Message Format
|
||||
|
||||
```
|
||||
<type>: <subject>
|
||||
|
||||
<body (optional)>
|
||||
|
||||
<footer (optional)>
|
||||
|
||||
💘 Generated with Crush
|
||||
|
||||
Assisted-by: <AI-Model> via Crush <crush@charm.land>
|
||||
```
|
||||
|
||||
**Types:**
|
||||
- `feat`: New feature
|
||||
- `fix`: Bug fix
|
||||
- `security`: Security vulnerability fix
|
||||
- `docs`: Documentation changes
|
||||
- `test`: Test additions/modifications
|
||||
- `refactor`: Code refactoring
|
||||
- `chore`: Maintenance tasks
|
||||
|
||||
**Example:**
|
||||
```
|
||||
security: disable SSH password authentication
|
||||
|
||||
PRD FR-006 requires key-based authentication only.
|
||||
PasswordAuthentication was incorrectly set to 'yes',
|
||||
violating the security requirement.
|
||||
|
||||
Fixes: SSH config now uses PasswordAuthentication no
|
||||
|
||||
💘 Generated with Crush
|
||||
|
||||
Assisted-by: GLM-4.7 via Crush <crush@charm.land>
|
||||
```
|
||||
|
||||
### Merge Requirements
|
||||
|
||||
- [ ] All tests pass
|
||||
- [ ] Zero lint warnings
|
||||
- [ ] At least one approval (for team projects)
|
||||
- [ ] No unresolved conversations
|
||||
- [ ] Branch up to date with main
|
||||
|
||||
---
|
||||
|
||||
## Security Review Process
|
||||
|
||||
### When Security Review is Required
|
||||
|
||||
1. Any change to:
|
||||
- Encryption configuration
|
||||
- Password policy
|
||||
- Firewall rules
|
||||
- SSH configuration
|
||||
- Authentication mechanisms
|
||||
- Kernel module blacklists
|
||||
|
||||
2. Any change touching files in:
|
||||
- `config/hooks/installed/`
|
||||
- `config/hooks/live/`
|
||||
- `src/security-hardening.sh`
|
||||
- `src/firewall-setup.sh`
|
||||
|
||||
### Security Review Checklist
|
||||
|
||||
- [ ] Change aligns with PRD requirements
|
||||
- [ ] No security regressions introduced
|
||||
- [ ] Complies with NIST SP 800-53 controls
|
||||
- [ ] Complies with NIST SP 800-111 (encryption)
|
||||
- [ ] Complies with CIS Benchmarks
|
||||
- [ ] Audit logging covers the change
|
||||
- [ ] Documentation updated
|
||||
|
||||
---
|
||||
|
||||
## Compliance Mapping
|
||||
|
||||
### NIST SP 800-53 Control Mapping
|
||||
|
||||
| Control | Implementation | Test |
|
||||
|---------|----------------|------|
|
||||
| AC-3 (Access Enforcement) | SSH key-only auth | `test:security` |
|
||||
| AU-2 (Audit Events) | auditd rules | `test:security` |
|
||||
| SC-13 (Crypto Protection) | LUKS2 encryption | `test:security` |
|
||||
| SC-28 (Data at Rest) | Full disk encryption | `test:security` |
|
||||
|
||||
### Compliance Test Execution
|
||||
|
||||
```bash
|
||||
# Run compliance-focused tests
|
||||
./run.sh test:security
|
||||
|
||||
# Run encryption-specific tests
|
||||
./run.sh test:encryption
|
||||
|
||||
# Run full compliance verification
|
||||
./run.sh test
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Release Process
|
||||
|
||||
### Pre-Release Checklist
|
||||
|
||||
- [ ] All tests pass (78 tests: 63 pass, 15 skip for libvirt)
|
||||
- [ ] Zero lint warnings
|
||||
- [ ] Security review complete
|
||||
- [ ] Documentation updated
|
||||
- [ ] CHANGELOG updated
|
||||
- [ ] Version bump in applicable files
|
||||
|
||||
### Build Verification
|
||||
|
||||
```bash
|
||||
# Build ISO
|
||||
./run.sh iso
|
||||
|
||||
# Verify checksums
|
||||
cd output/
|
||||
sha256sum -c knel-football-secure.iso.sha256
|
||||
md5sum -c knel-football-secure.iso.md5
|
||||
```
|
||||
|
||||
---
|
||||
|
||||
## Incident Response
|
||||
|
||||
### Security Vulnerability Found
|
||||
|
||||
1. **STOP** - Do not commit the vulnerable code
|
||||
2. **DOCUMENT** - Create issue tracking the vulnerability
|
||||
3. **FIX** - Implement fix following TDD process
|
||||
4. **VERIFY** - All tests pass, security tests pass
|
||||
5. **REVIEW** - Security review of the fix
|
||||
6. **RELEASE** - Expedited release if critical
|
||||
|
||||
---
|
||||
|
||||
## References
|
||||
|
||||
- **PRD.md** - Product Requirements Document
|
||||
- **AGENTS.md** - Agent Behavior Guidelines
|
||||
- **README.md** - Project overview and commands
|
||||
- **docs/TEST-COVERAGE.md** - Test suite documentation
|
||||
- **docs/VERIFICATION-REPORT.md** - Verification results
|
||||
|
||||
---
|
||||
|
||||
## Version History
|
||||
|
||||
| Version | Date | Changes |
|
||||
|---------|------|---------|
|
||||
| 1.0 | 2026-02-17 | Initial SDLC document |
|
||||
|
||||
---
|
||||
|
||||
**This SDLC is MANDATORY for all changes to this project.**
|
||||
|
||||
**Copyright © 2026 Known Element Enterprises LLC**
|
||||
**License: GNU Affero General Public License v3.0 only**
|
||||
Reference in New Issue
Block a user