Patent ID: 6189099
Filing Date: 2001-02-13
Classification: G06F,G06Q

Abstract:
A multi-level security system to prevent unauthorized use of a computer, said system comprising:a program resident on said computer and implementing a user-validation procedure;a key device to be inserted into the computer by the user to gain use of the computer, and carrying a first serial number and an optional encryption key;means for storing in said computer a second serial number, said second serial number being the serial number of a device internal to said computer;a mass storage device installed in said computer and storing a validation record; said validation record including an unencrypted portion and an encrypted portion, said unencrypted portion including a copy of said first serial number and said encrypted portion including a copy of said second serial number;means for interfacing said key device to said computer;a protocol initiated by said computer that is recognized by said key device to transmit said first serial number and said encryption key;means for reading said first serial number and said encryption key from said key device, and for matching the key device and the validation record, and means for allowing use of the computer only if said matching exists.