G - Physics – 06 – F
Patent
G - Physics
06
F
354/233
G06F 13/42 (2006.01) G06F 12/14 (2006.01) G06F 21/00 (2006.01)
Patent
CA 1231457
ABSTRACT OF THE INVENTION A method and apparatus are taught to prevent unauthorized access to and/or service by a computer system that is not dependent upon passwords. The preferred embodiment of the invention is an integrated circuit chip 'key' associated with each piece of authorized equipment, and a small amount of computer program controlling application of signals to, and receiving signals from, each circuit chip key for checking authorized access. In operation the system controller of the computer system utilizes the aforementioned program to periodically check each identical key by transmitting a randomly generated binary number to each key, which keys react thereto to encrypt the randomly generated number and return a resultant binary number to the system controller. The system controller checks the resultant binary number received from each key associated with a piece of equipment connected to the computer system with the resultant binary number received from its own key. Upon there being a match between the numbers the controller knows that the particular piece of equipment is authorized to be connected to the system. If there is no match the equipment is not authorized to be connected to the system and is denied access to service.
484251
Bakhmutsky David
Fu Andrew N.
Gould Kirk B.
Smart & Biggar
Wang Laboratories Inc.
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