Method for improving the security of authentication...

H - Electricity – 04 – L

Patent

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Details

H04L 9/32 (2006.01) H04Q 7/38 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2343180

The invention relates to a method for improving the security of authentication procedures in digital mobile radio telephone systems. In order to make it more difficult if not impossible to work out a secret code KI, several different secret SIM-specific codes KI are contained in the mobile radio telephone network and on a subscriber identity module SIM and a code KI for the implementation of said authentication is selected from the various secret codes thus contained during the authentication process between the subscriber identity module and the mobile radio telephone system pertaining to said SIM.

Procédé de renforcement de la sécurité de procédures d'authentification dans des systèmes radiomobiles numériques. Selon la présente invention, dans le réseau radiomobile et sur un module d'identification d'abonné SIM sont conservés plusieurs codes secrets différents spécifiques au SIM. Lors de l'authentification entre le module d'identification d'abonné et le réseau radiomobile, un code KI est sélectionné par le SIM parmi les codes secrets conservés, en vue de la procédure d'authentification. Ledit procédé rend plus difficile, voire pratiquement impossible, la détection frauduleuse du code secret KI.

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