| 摘要 |
FIELD: communication facilities. ^ SUBSTANCE: it is implemented unpredictable for attackers - unattended mobile systems relation of formed in mobile system ringing signal from the secret key, value of time station and random number, that provides increasing of proofness against attack of interlocking of network access, implemented by attacker. It is excluded reuse by attackers of ring signal of operate of mobile systems in the capacity of spurious ring signal, accepted by base station as original. In base station during the receiving and checking of identity of received ring signal excluding additional checking is directly established, is it a ring signal of serviced mobile system or ring signal of unattended mobile system. Characteristics of versions of declared method are different foundations of ring signal conditioning and used for it pseudorandom sequence. In control system of access control CDMA including not less than one base station, authentication center and i- mobile system, where i=1, 2, Ç, N there are introduced additional blocks and connections to each other. ^ EFFECT: increasing proofness against attack of network CDMA access blocking. ^ 18 cl, 58 dwg |
