Cryptography – Cellular telephone cryptographic authentication
Reexamination Certificate
2011-04-19
2011-04-19
Cervetti, David Garcia (Department: 2436)
Cryptography
Cellular telephone cryptographic authentication
C380S270000, C380S044000
Reexamination Certificate
active
07929699
ABSTRACT:
Systems and methods of securing wireless communications between a network and a subscriber station include inserting a marker denoting an encryption type within a random value used for authentication, calculating a first session key and a first response value as a function of the random value, then calculating a second session key and a second response value as a function of the random value, first session key and first response value. The two levels of session keys and response values may be used by upgraded subscriber stations and network access points to prevent attackers from intercepting authentication triplets.
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Hawkes Philip M.
Paddon Michael
Rose Gregory G.
Semple James F.
Cervetti David Garcia
Ekwueme Kristine U.
Qualcomm Incorporated
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