CK’,IK’推导: 鉴权成功后,ME和AUSF网元会生成该密钥。长度为128bits。 KDF(Key,S),其中,Key为CK || IK,S值如下: FC = 0x20, P0 = SNN, L0 =length of SNN P1= SQN⊕AK L1= length of SQN⊕AK
输出的前128bits为CK’,后128bits为IK’。
KAUSF推导: primaryauthentication过程成功后,ME和AUSF网元会生成该密钥。长度为256bits。 对于5GAKA:KDF(Key,S), 其中,Key为CK || IK,S值如下:
FC = 0x10, P0 = SNN, L0 =length of SNN P1= SQN⊕AK L1 =length of SQN Å AK
对于EAPAKA’: KAUSF为EMSK的前256bits。
KSEAF推导: ME和AUSF网元会根据KAUSF计算生成KSEAF。AUSF网元会将该密钥传递给SEAF网元。长度为256bits。 KDF(Key,S),其中Key为KAUSF,S值为:
FC = 0x6C, P0 = SNN, L0 =length of SNN.
KAMF推导: ME和SEAF网元会根据KSEAF计算生成KAMF。长度为256bits。 KDF(Key,S),其中Key为KSEAF,S值为:
FC = 0x6D P0 = SUPI L0 = P0length - number of octets in P0 P1 = ABBAparameter L1 = P1length - number of octets in P1
KNASint推导: 3GPP接入的NAS信令完保密钥。长度为256bits或者128bits。 KDF(Key,S),其中,Key为KAMF,S值如下:
FC = 0x69, P0 =algorithm type distinguisher, L0 =length of algorithm type distinguisher P1 =algorithm identity L1 =length of algorithm identity
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