Glossary

AV – Authentication Vector
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AV – Authentication Vector

Either a quintet or a triplet of parameters. 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. A triplet consists of three elements: a network challenge, RAND (Random Number) an expected user response, SRES (Signed Response) Kc (Cipher key). 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. A quintet consists of five elements: a network challenge (RAND) an expected user response, XRES (Expected Response) CK (Cipher Key) IK (Integrity Key) AUTN (Authentication Token).

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