FIELD: information technologies.
SUBSTANCE: after first complete authentication of communication session between terminal (21) and server (24) by means of the first server (23a) authentication is performed as follows: stage (11), at which each of first authentication server (23a) and of other authentication servers (23b) is given appropriate unique realm; and stage (13), at which during authentication between terminal and first authentication server (23a) first authentication server (23a) transfers to terminal (21) identification code of reauthentication including unique realm given to first authentication server. Then during reauthentication, in order to ensure performance of reauthentication using the same authentication server (23a) which performed complete authentication, i.e. using first authentication server (23a), identification code of reauthentication is set to reauthentication query.
EFFECT: insuring of reauthentication by means of authentication server, accreditation and account, differing from ACS server which performed complete authentication.
14 cl, 2 dwg
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