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Reply To: AuC – Authentication Center


Is there any usualy used protocol to interconnect AuC with HLR? (because this is only feasible way to connect AuC with HLR from different producer)

About algorithms A3, A8 I have found that they are not strictly standardized. There exist only some proposals that are available from GSM forum. As I suppose the specific algorithm (A3, A8) is negotiated between operator and SIM card supplier. Can anybody confirm this guess? Another question arise: Is it usual that one operator uses more than one type of A3, A8 algorithms – different version of SIMs??? Why? – different level of security???