AUTHENTICATION METHOD IN DATA COMMUNICATION AND SM

专利名称：AUTHENTICATION METHOD IN DATA

COMMUNICATION AND SMART CARD FORIMPLEMENTING THE SAME

发明人：BERNARD, Eddy, c/o Axalto SA,SALGADO,

Stéphanie, c/o Axalto SA

申请号：EP04744327.0申请日：20040830公开号：EP1665726A1公开日：20060607

摘要：The invention sets forth an authentication method for use in a system includinga first entity and a second entity in a network, the first entity being adapted toauthenticate the second entity and data received therefrom, both first and secondentities storing the same secret key. The method is implemented in a smart card such asa USIM card, including : a memory storing authentication algorithms and keys; means forreceiving a message authenticating code and other parameters; means for computing anexpected code from said other parameters and from said secret key; means forcomparing said message authenticating code received and said expected code; andmeans for aborting authentication if the message authenticating code received and theexpected code do not match. The smart card further comprises a failure counter adaptedto store the number of abortion occurrences, and means for updating said failurecounter every time the comparing means indicate that said message authenticating codeand said expected code do not match. Thanks to its built-in failure counter and the factthat the updating of this counter is controlled from inside the card, the card becomes

tamper-resistant against reiterated fraudulent authentication attempts.

申请人：Axalto SA

地址：50, avenue Jean Jaurès 92120 Montrouge FR

国籍：FR

代理机构：Jacquot, Ludovic R. G.

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