Computer with improved keyboard password functions

Details Computer with improved keyboard password functions Computer with improved keyboard password functions

1989-02-07

1990-07-17

Buczinski, Stephen C.

Cryptography

Cryptanalysis

380 25, 380 50, 34082531, 34082534, H04L 932

Patent

active

049426060

ABSTRACT:
A computer having an improved keyboard/auxiliary device interface controller which supports the selective restriction of user interaction with the computer system, while maintaining the full internal functionality of the host/peripheral interface. A "password lock mode" of the improved controller prevents users from gaining unauthorized access to the computer system, but still application and operating system software can continue to issue commands to and receive responses from the otherwise disabled peripheral devices. The improved controller does not require modification to the conventional keyboard/auxiliary device hardware.

REFERENCES:
patent: 4529870 (1985-07-01), Chaum
patent: 4536647 (1985-08-01), Atalla et al.
patent: 4697072 (1987-09-01), Kawana
patent: 4882752 (1989-11-01), Lindman et al.
patent: 4891838 (1990-01-01), Faber

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