Paging device including password accessed stored cryptographic k

Details Paging device including password accessed stored cryptographic k Paging device including password accessed stored cryptographic k

1995-03-21

1996-01-09

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 49, 34082544, 3403111, H04K 100

Patent

active

054835950

ABSTRACT:
A paging device includes a cryptographic function and a password accessed cryptographic key look-up table associating each stored key with a password. When an cryptographic message is collected by the paging device, the user can select a relatively long cryptographic key by entering a relatively shorter password. The paging device then applies a cryptographic function to a received message using a selected relatively long cryptographic key, the selection being a function of user entry of a relatively short password. Overall, paging messages in transit, i.e., while broadcast by radio signal, enjoy a high level of security by encryption with a relatively long cryptographic key by a message source. As accessed by the user, however, the cryptographic messages are reviewed in readable form by use of a relatively short password designating a relatively long stored cryptographic key.

REFERENCES:
patent: 4783654 (1988-11-01), Ichikawa
patent: 5146217 (1992-09-01), Holmes et al.
patent: 5150954 (1992-09-01), Hoff
patent: 5241599 (1993-08-01), Bellovin et al.
patent: 5283832 (1994-02-01), Lockhart, Jr. et al.
patent: 5285496 (1994-02-01), Frank et al.
patent: 5294922 (1994-03-01), Akahori

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