Cryptography – Key management – Having particular key generator
Patent
1992-06-26
1994-05-17
Ray, Gopal C.
Cryptography
Key management
Having particular key generator
380 25, 34082531, 364231, 3642864, 3642865, 364234, 364DIG1, G06F 1314, H04L 932
Patent
active
053136390
ABSTRACT:
A computer has a floppy disk drive provided in one of the spaces for receiving disk drives of the computer, a computer keyboard and a main system board. An access control device includes a casing placed into another one of the spaces for receiving disk drives of the computer, a keypad provided on a front panel of the casing and operated so as to provide an input password, and a control unit provided within the casing and electrically connected to the keypad. The control unit includes a memory unit which contains a desired password, a microprocessor unit which receives the input password from the keypad and which generates an activating signal when the input password tallies with the desired password in the memory unit, and at least one control circuit connected to a respective one of the computer keyboard, the floppy disk drive and the main system board. Each of the control circuits is actuated by the activating signal from the microprocessor unit so as to unlock and enable the respective one of the computer keyboard, the floppy disk drive and the main system board and permit normal operation of the computer.
REFERENCES:
patent: 4295039 (1981-10-01), Stuckert
patent: 4310720 (1982-01-01), Check, Jr.
patent: 4758718 (1988-07-01), Fujisaki et al.
patent: 4787027 (1988-11-01), Prugh et al.
patent: 4812841 (1989-03-01), Chen
patent: 4815032 (1989-03-01), Fujii
patent: 4879645 (1989-11-01), Tamada et al.
patent: 4970504 (1990-11-01), Chen
patent: 5012514 (1991-04-01), Renton
patent: 5060263 (1991-10-01), Bosen et al.
patent: 5097506 (1992-03-01), Kaiser, Jr. et al.
patent: 5173940 (1992-12-01), Lantz et al.
LandOfFree
Computer with security device for controlling access thereto does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Computer with security device for controlling access thereto, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computer with security device for controlling access thereto will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-885129