METHOD AND SYSTEM FOR GENERATING A SEQUENCE NUMBER

专利名称：METHOD AND SYSTEM FOR GENERATING A

SEQUENCE NUMBER TO BE USED FORAUTHENTICATION

发明人：NIEMI, Valtteri,LAKSHMESHWAR,

Shreekanth,KOVANEN, Tero

申请号：EP00925175.2申请日：20000406公开号：EP1273126A1公开日：20030108

摘要：The invention relates to a method and system for performing an authentication,preferably between an user equipment and a network entity of a communication networkwherein sequence numbers are used for generating an authentication information whichmay be transmitted to the user equipment for authentication purpose. The sequencenumbers are generated on the basis of a general information changing in a definedmanner such as a global clock, and a value stored in a database. For reducing the numberof database writing operations, the value is used several times for generating severaldifferent sequence numbers. The user-specific value may be calculated based on thedifference between a previously used or predetermined sequence number and thegeneral information, and is changed only in a re-synchronisation procedure. Such a re-synchronisation procedure may be performed when the difference between the user-specific value and the general information exceeds a certain limit, or when the previouslyused or predetermined sequence number is larger than the general information.

申请人：Nokia Corporation

地址：Keilalahdentie 4 02150 Espoo FI

国籍：FI

代理机构：Leson, Thomas Johannes Alois, Dipl.-Ing.

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