MK = PRF'(IK'|CK',"EAP-AKA'"|Identity) MK_ECDHE = PRF'(IK'|CK'|SHARED_SECRET,"EAP-AKA' FS"|Identity) K_encr = MK[0..127] K_aut = MK[128..383] K_re = MK_ECDHE[0..255] MSK = MK_ECDHE[256..767] EMSK = MK_ECDHE[768..1279]