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Computer security system

  • US 5,297,200 A
  • Filed: 04/28/1993
  • Issued: 03/22/1994
  • Est. Priority Date: 04/01/1989
  • Status: Expired due to Fees
First Claim
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1. A security system for a computer (10) having at least one external serial communications port (12),the external serial communications port comprising a plurality of inputs and outputs for connection to a peripheral device,the security system comprising:

  • a card reader (14);

    switching means (22) connected to the card reader and connectable to the external serial communications port, the switching means being operable to connect the card reader to at least a portion of the inputs of the external serial communications port and to disconnect the same portion of the inputs from the peripheral device in response to a command including protected routines which generate said command to cause the switching means to connect the card reader to the at least a portion of the inputs of the external serial communications port; and

    means for comparing data, read from a card by the card reader, with authorization data held in the computer, to enable or disable further operation of the protected routine.

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