FIELD: information technologies.
SUBSTANCE: initial download server function (IDSF) is specified, which creates authentication voucher announcing authentication for network application function NAF. IDSF generates keys Ks and Ks NAF with according identifiers B-TID and B-TID-NAF keys. In order to prevent tracking of user by means of collusion between several objects of NAF, B-TID-NAF and voucher may be unique for each NAF. Ua interface is additionally protected by coding with application of Ks key, and Ub interface is additionally protected against attacks by connection with substitute by application of signatures with key Ks and provision of update.
EFFECT: improved level of confidentiality and authentication protection.
23 cl, 8 dwg
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