Random Number (RAND), Signed Response (SRES) and Ciphering Key (Kc) fields form a triplet vector used for authentication and encryption as defined in TS 43.020
In I-WLAN for SIM based users, triplet vectors are calculated in the 2G AuC and provided to the 2G HLR/HSS (see GSM 12.03 
). For USIM based users, triplet vectors are derived from quintuplet vectors in the 3G HLR/HSS if needed (see TS 33.102
A set of up to 5 triplet values are sent from the 2G HLR/HSS to the 3GPP AAA Server upon request. These data are temporary subscriber data stored in the 3GPP AAA Server.
Random Challenge (RAND), Expected Response (XRES), Cipher Key (CK), Integrity Key (IK) and Authentication Token (AUTN) fields form a quintuplet vector used for user authentication, data confidentiality and data integrity as defined in TS 33.102
In I-WLAN, a set of quintuplet vectors are calculated in the AuC, and up to 5 quintuplets are sent from the HLR/HSS to the 3GPP AAA Server upon request (see TS 29.002
These data are temporary subscriber data stored in the HSS and 3GPP AAA Server.