Password processing whereby a foreign password is referred to af

Details Password processing whereby a foreign password is referred to af Password processing whereby a foreign password is referred to af

1994-05-06

1995-12-12

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

235382, 2353825, 380 4, H04K 100

Patent

active

054757550

ABSTRACT:
Only while correct passwords are supplied to a comparator (21) of a password processing device to put a utilization device (11) into operation, a processor (25) processes password information into a processed datum. If a foreign, incorrect password supplied to the comparator the utilization device is not put into operation, and the foreign password is stored in a memory (17) as a stored datum and is processed into the processed datum. If consecutively supplied, such foreign passwords are successively used in the stored datum. The processed datum is thereby rendered undefined. Preferably, the password information makes the processed datum twice or five times indicate a unique password. The utilization device is typically a receiver circuit of a selective call radio receiver.

REFERENCES:
patent: 4734568 (1988-03-01), Watanabe
patent: 5073767 (1991-12-01), Holmes et al.
patent: 5206905 (1993-04-01), Lee et al.
patent: 5323465 (1994-06-01), Avarne

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