System and method for authentication of a roaming subscriber

Cryptography – Cellular telephone cryptographic authentication

Reexamination Certificate

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C380S270000

Reexamination Certificate

active

10181617

ABSTRACT:
A network system is proposed comprising a first network control element in a visited network, a second network control element in a home network and a communication device (UE) associated to a subscriber, wherein the first network control element is adapted to perform a first authentication (A9) of a roaming subscriber requesting authentication, and the second network control element is adapted to perform a second authentication (A11) of the same subscriber. By this measure, both network control elements are able to verify that the authentication was performed correctly. Also a corresponding method is proposed.

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patent: 197 30 301 (1998-09-01), None
Bjornland D.F. et al. “CTM Internetworking: Extending to Roaming Users” 1997 IEEE 47th. Vehicular Technology Conference. Phoenix, May 4-7, 1997, IEEE Vehicular Tech. Conference, New York, IEEE, US, vol. 3, Conf. 47, Nov. 18, 1996, pp. 1146-1150.

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