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1. (WO2001037586) METHOD FOR AUTHENTICATING A RADIO COMMUNICATION NETWORK VIS-A-VIS A MOBILE STATION

Pub. No.:    WO/2001/037586    International Application No.:    PCT/DE2000/004060
Publication Date: Sat May 26 01:59:59 CEST 2001 International Filing Date: Fri Nov 17 00:59:59 CET 2000
IPC: H04W 12/12
Applicants: SIEMENS AKTIENGESELLSCHAFT
HORN, Günther
VINCK, Bart
Inventors: HORN, Günther
VINCK, Bart
Title: METHOD FOR AUTHENTICATING A RADIO COMMUNICATION NETWORK VIS-A-VIS A MOBILE STATION
Abstract:
The invention relates to a method for authenticating a radio communication network vis-à-vis a mobile station. In such a method, batches (BA) of authentication vectors (AVn) that each contain an authentication token (AUTNn) with a pertaining sequence number (SQNn) are generated on the network side. At the mobile station side an identity module (USIM) of the mobile station (MT) decides whether a sequence number (SQNi) contained in a previously selected authentication vector (AVi) is accepted for authentication or rejected. The identity module (USIM) is informed by the radio communication network which authentication tokens (AUTNn) with the pertaining sequence numbers (SQNn) are present in the same batch (BA). One sequence number (SQNx, SQN) per batch (BA) is stored by the identity module (USIM) and is used to decide whether the sequence number (SQNi) received is accepted or rejected.