AV
Authentication Vector
The GSM authentication vector uses a triplet of parameters which provides temporary authentication data that enables a VLR (Visitor Location Register) or SGSN (Serving GPRS Support Node) to engage in GSM authentication with a particular user. The UMTS authentication vector uses a quintet of parameters which provides temporary authentication data that enables an VLR or SGSN to engage in UMTS authentication with a particular user.
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