diff --git a/oid/oid.go b/oid/oid.go
index af2474e..92ad886 100644
--- a/oid/oid.go
+++ b/oid/oid.go
@@ -15,26 +15,27 @@
 // Package oid contains X.509 and TCG ASN.1 object identifiers.
 package oid
 
-import "encoding/asn1"
-
 // Trusted Computing Group (2.23.133)
 var (
-	TPMManufacturer            = asn1.ObjectIdentifier{2, 23, 133, 2, 1}
-	TPMModel                   = asn1.ObjectIdentifier{2, 23, 133, 2, 2}
-	TPMVersion                 = asn1.ObjectIdentifier{2, 23, 133, 2, 3}
-	TCGPlatformSpecification   = asn1.ObjectIdentifier{2, 23, 133, 2, 17}
-	TBBSecurityAssertions      = asn1.ObjectIdentifier{2, 23, 133, 2, 19}
-	TPMSpecification           = asn1.ObjectIdentifier{2, 23, 133, 2, 16}
-	TCGCredentialSpecification = asn1.ObjectIdentifier{2, 23, 133, 2, 23}
-	TCGCredentialType          = asn1.ObjectIdentifier{2, 23, 133, 2, 25}
-	PlatformManufacturerStr    = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 1}
-	PlatformManufacturerID     = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 2}
-	PlatformConfigURI          = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 3}
-	PlatformModel              = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 4}
-	PlatformVersion            = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 5}
-	PlatformSerial             = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 6}
-	PlatformConfigurationV1    = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 7, 1}
-	PlatformConfigurationV2    = asn1.ObjectIdentifier{2, 23, 133, 5, 1, 7, 2}
+	TPMManufacturer            = []int{2, 23, 133, 2, 1}
+	TPMModel                   = []int{2, 23, 133, 2, 2}
+	TPMVersion                 = []int{2, 23, 133, 2, 3}
+	TCGPlatformSpecification   = []int{2, 23, 133, 2, 17}
+	TBBSecurityAssertions      = []int{2, 23, 133, 2, 19}
+	TPMSpecification           = []int{2, 23, 133, 2, 16}
+	TCGCredentialSpecification = []int{2, 23, 133, 2, 23}
+	TCGCredentialType          = []int{2, 23, 133, 2, 25}
+	PlatformManufacturerStr    = []int{2, 23, 133, 5, 1, 1}
+	PlatformManufacturerID     = []int{2, 23, 133, 5, 1, 2}
+	PlatformConfigURI          = []int{2, 23, 133, 5, 1, 3}
+	PlatformModel              = []int{2, 23, 133, 5, 1, 4}
+	PlatformVersion            = []int{2, 23, 133, 5, 1, 5}
+	PlatformSerial             = []int{2, 23, 133, 5, 1, 6}
+	PlatformConfigurationV1    = []int{2, 23, 133, 5, 1, 7, 1}
+	PlatformConfigurationV2    = []int{2, 23, 133, 5, 1, 7, 2}
+	EKCertificate              = []int{2, 23, 133, 8, 1}
+	VerifiedTPMRestricted      = []int{2, 23, 133, 11, 1, 3}
+	EKPermIDSHA256             = []int{2, 23, 133, 12, 1}
 )
 
 // X.509 (2.23.23)
@@ -42,7 +43,20 @@ var (
 // https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=14033
 // https://tools.ietf.org/html/rfc5280
 var (
-	SubjectDirectoryAttributes = asn1.ObjectIdentifier{2, 5, 29, 9}
-	SubjectAltName             = asn1.ObjectIdentifier{2, 5, 29, 17}
-	CertificatePolicies        = asn1.ObjectIdentifier{2, 5, 29, 32}
+	SubjectDirectoryAttributes = []int{2, 5, 29, 9}
+	SubjectAltName             = []int{2, 5, 29, 17}
+	CertificatePolicies        = []int{2, 5, 29, 32}
 )
+
+// RFC 4043
+//
+// https://tools.ietf.org/html/rfc4043
+var (
+	PermanentIdentifier = []int{1, 3, 6, 1, 5, 5, 7, 8, 3}
+)
+
+// Google (1.3.6.1.4.1.11129)
+var (
+	CloudComputeInstanceIdentifier = []int{1, 3, 6, 1, 4, 1, 11129, 2, 1, 21}
+)
+