Identity confidentiality method in radio communication system

Details Identity confidentiality method in radio communication system Identity confidentiality method in radio communication system

1995-12-15

1999-03-30

Hayes, Gail O.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 28, 380 29, 380 30, 380 49, H04L 900, H04K 100

Patent

active

058898611

ABSTRACT:
The radio communication system has at least one first radio station such as a base station and a plurality of second radio stations such as mobile stations. The base station at least possesses a public key, and each of the mobile stations possesses a public-key cryptography function for using the public key and an identity itself. An identity confidentiality method includes steps of generating a time-varying public key at the base station based upon a predetermined time initial, and repeatedly broadcasting, from the base station, the generated time-varying public key to all the mobile stations. The mobile stations cipher their respective identities with the broadcasted time-varying public key so that the encrypted/identities of the mobile stations, which are sent to the base station, remain confidential. After enciphering their identity, the mobile stations wait to be called. When a mobile station is to be called, the base station enciphers the mobile station's identity with the time-varying public key and pages the enciphered identity to all mobile stations.

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"Answers to Frequently Asked Questions About Today's Crytography", RSA Laboratories, Revision 2.0, Oct. 5, 1993, pp. 1-44.

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