Section: B.3 Derivation of CK’CS|| IK’CS from CKPS||IKPS
Content: This input string is used for UMTS subscribers when there is a need to derive CK’CS|| IK’CS from CKPS||IKPS during mapping the security contexts from HSPA to UTRAN/GERAN. The Key is the concatenation of CKPS||IKPS (which are 128 bits each), and the output is CK’CS||IK’CS (which are 128 bits each). - FC = 0x30 - P0 = NONCE - L0 = length of NONCE (i.e. 0x00 0x10) Further, the GSM Kc’ used in GERAN shall be derived from CK’CS||IK’CS using the key conversion function c3 defined in this specification.