Cryptography – Cellular telephone cryptographic authentication – Visiting center
Reexamination Certificate
2006-09-05
2009-11-03
Barron, Jr., Gilberto (Department: 2432)
Cryptography
Cellular telephone cryptographic authentication
Visiting center
C713S171000, C455S435100
Reexamination Certificate
active
07613299
ABSTRACT:
Techniques are described for enabling authentication and/or key agreement between communications network stations and service networks. The techniques described include the negotiation and use of a cryptographic primitive shared between a service network and a home environment of a station. The techniques described also feature a key usage indicator, such as a sequence number, maintained by the service network and a station. Comparison of the key usage indicators can, for example, permit efficient authentication of the service network.
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Barron Jr. Gilberto
Nobahar Abdulhakim
Verizon Laboratories Inc.
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