Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1992-10-29
1994-12-27
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 4, 380 23, 380 49, 34082531, 34082534, 235380, H04L 932, G06F 1300
Patent
active
053772695
ABSTRACT:
A system for controlling access to a computer. Memory-resident software logic cooperates with a remote electronic key device coupled to the computer's processor, through the printer port, to disable the computer unless an authorized key is inserted in the key device. The logic is executed in the processor responsive to the computer's system timer interrupt for continuous monitoring capability. Until a user inserts an authorized key, or upon removal of the key, the logic suspends operation of any application programs, the monitor is blanked and the mouse, keyboard and floppy disk drive are disabled. A record is stored in memory of authorized users and user audit information. Utility menu options are used to add or delete user keys, display access and usage records and to customize the number and selection of I/O devices to be disabled by the system.
REFERENCES:
patent: 3609697 (1971-09-01), Blevins et al.
patent: 4599489 (1986-07-01), Cargile
patent: 4609777 (1986-09-01), Cargile
patent: 4757533 (1988-07-01), Allen et al.
patent: 4819267 (1989-04-01), Cargile et al.
patent: 4870401 (1989-09-01), Lee et al.
patent: 4943804 (1990-07-01), Lee et al.
patent: 4951249 (1990-08-01), McClung et al.
patent: 4959861 (1990-09-01), Howlette
patent: 4972470 (1990-11-01), Farago
patent: 5010331 (1991-04-01), Dias et al.
patent: 5081676 (1992-01-01), Chou et al.
patent: 5083309 (1992-01-01), Beysson
patent: 5155680 (1992-10-01), Wiedemer
patent: 5182770 (1993-01-01), Medveczky et al.
patent: 5222133 (1993-06-01), Chou et al.
patent: 5222134 (1993-06-01), Waite et al.
Dallas Semiconductor, Electronic Key, DS1204U, promotional literature, no date.
Baker Robert
Heptig John P.
Schultz George R.
Gregory Bernarr E.
Intelligent Security Systems, Inc.
McCombs David L.
LandOfFree
Security access and monitoring system for personal computer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Security access and monitoring system for personal computer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Security access and monitoring system for personal computer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-924664