Security in cellular telephones

Details Security in cellular telephones Security in cellular telephones

1997-02-07

2000-08-29

Cangialosi, Salvatore

Cryptography

Key management

Key distribution

380 46, H04K 100

Patent

active

061119555

ABSTRACT:
A system for delivering a security code to a cellular telephone. The cellular telephone holds a key X. The cellular telephone requests that an Authorization Center, AC, assign a security code to the cellular telephone. The AC selects a security code, and encrypts it, such that key X is effective to de-crypt the code, yet the AC does not know key X.

REFERENCES:
patent: 5239294 (1993-08-01), Flanders et al.
patent: 5513245 (1996-04-01), Mizikovsky et al.
patent: 5572193 (1996-11-01), Flanders et al.
patent: 5579375 (1996-11-01), Ginter
patent: 5689563 (1997-11-01), Brown et al.
patent: 5708710 (1998-01-01), Duda
patent: 5794139 (1998-08-01), Mizikovsky et al.
patent: 5799084 (1998-08-01), Gallagher et al.

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