Power-on password functions for computer system

Details Power-on password functions for computer system Power-on password functions for computer system

1989-02-07

1990-09-25

Tarcza, Thomas H.

Cryptography

Cryptanalysis

380 25, H04L 900

Patent

active

049598600

ABSTRACT:
A power-on password security function for a digital computer system allows the system software to distinguish between authorized and unauthorized users. Safeguards are made against corruption of password data which could lead to lock-out authorized users, and redundant checks allow the security function to operate even when first-level checks fail. The battery-powered RAM storage area used to hold the password when the system is turned "off" is protected against being accessible by unauthorized users when the system is turned "on".

REFERENCES:
patent: 3890601 (1975-06-01), Pietrolewicz
patent: 4800590 (1989-01-01), Vaughan

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