Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1994-04-21
1996-05-07
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
34082534, 327525, H04K 100, H04K 900
Patent
active
055154409
ABSTRACT:
A secure computer controlling access to internal devices via an integrated card reader. A microprocessor-controlled card reader interface logically connected to the CPU of the computer reads and writes information from and to a card placed in the card reader and performs additional functions in response to commands received from the CPU. The boot ROM of the computer is programmed to start execution from a program logic device which runs a verification program to verify the authenticity of a user. Upon a valid user card being placed in the card reader, one or more questions are read from the card and displayed to the user. The user's responses are saved and compared to the correct answers stored on the card, and if the responses match the correct answers, a power control circuit is used by the CPU to turn on power to computer peripherals the user has been authorized to use.
The system additionally provides for a method of initializing and authorizing a user card with a security administrator card. Upon a valid security administrator card being placed in the card reader, a security administrator initializes and authorizes one or more individual user cards by selecting from a list of menu options displayed to the security administrator. The security administrator inputs a list of questions and answers which are then stored on the user card for use during the verification procedure.
The system further provides for the physical and logical destruction of data in response to unauthorized attempts by a user to violate the physical or logical integrity of the computer system. The physical and logical destruction of data may be disabled for maintenance or configuration purposes by the use of a maintenance card.
REFERENCES:
patent: 4742215 (1988-05-01), Daughters et al.
patent: 4797928 (1989-01-01), Dykes
patent: 4817140 (1989-03-01), Chandra
patent: 5065429 (1991-11-01), Lang
patent: 5084085 (1991-09-01), Abraham et al.
patent: 5091939 (1992-02-01), Cole et al.
patent: 5159629 (1992-10-01), Double et al.
patent: 5210795 (1993-05-01), Lipner et al.
patent: 5933898 (1990-06-01), Gilberg et al.
BITS: A Smartcard Protected Operating System, Communications of the ACM, Nov. 1994, vol. 37, No. 11, pp. 66-94.
SmartDisk Security Corporation, SafeBoot.TM. PC Security Sytem product brochure, 2 pages, 1993.
Super Crypt Spec from CE INFO SYS, High Speed Cryptographic Data Security Device, pp. 1-35.
INFOSYS-CryptCard, Security System for Notebooks, pp. 1-14.
GLazier James B.
Kimlinger Joseph A.
Mooney David M.
Wood David E.
Buczinski Stephen C.
Integrated Technologies Of America, Inc.
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