Method for improving the security of authentication...

Details Method for improving the security of authentication... Method for improving the security of authentication...

2005-08-23

2005-08-23

Beamer, Temica M. (Department: 2681)

Telecommunications

Radiotelephone system

Security or fraud prevention

C455S411000, C455S558000, C380S277000

Reexamination Certificate

active

06934531

ABSTRACT:
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.

REFERENCES:
patent: 5596641 (1997-01-01), Ohashi et al.
patent: 5661806 (1997-08-01), Nevoux et al.
patent: 5887251 (1999-03-01), Fehnel
patent: 6009174 (1999-12-01), Tatebayashi et al.
patent: 6058477 (2000-05-01), Kusakabe et al.
patent: 6665529 (2003-12-01), Mills, Jr.
patent: 0 506 637 (1992-09-01), None
patent: 0 653 895 (1995-05-01), None
PCT Search Report mailed Apr. 17, 2000 corresponding to PCT/DE99/02836.

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