Patent ID: 6425084
Filing Date: 2002-07-23
Classification: G06F,G06Q

Abstract:
An infrared (IR) multilevel security system to prevent unauthorized use of a computer, said system comprising:an infrared receiving port on the computer; an infrared key device having an IR transmitter and carrying at least a first serial number, and an encryption key, said infrared key device having a transmit switch which is manually operable to send an infrared message to the computer; a device installed in said computer storing a second serial number; a storage device installed in said computer and storing a validation record, having a copy of said first serial number and an encrypted copy of said second serial number; a computer program to compare said first serial number from said key device with said copy of the first serial number inside said computer and to decrypt said encrypted copy of said second serial number, and to compare said decrypted copy of said second serial number with said second serial number; and means for automatically powering down said computer if said copy of said second serial number and the decrypted second serial number do not match.