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Trusted personal computer system with limited accessibility

  • US 5,918,007 A
  • Filed: 05/27/1992
  • Issued: 06/29/1999
  • Est. Priority Date: 05/27/1992
  • Status: Expired due to Fees
First Claim
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1. A personal computer system for receiving and retaining data to be maintained at a selected one of a plurality of levels of security and capable of securing data retained within the system against unauthorized access, the system comprising:

  • a normally closed enclosure defining at least one physical opening for one of;

    (i) passage of a flow of cooling air and (ii) insertion and removal of digital signal storage media and (iii) connection of cables and the like,at least one security feature element mounted within said enclosure for selective activation to secure and non-secure states, said security feature element when set into secure state protecting the personal computer system against access to stored data by an unauthorized user and being disposed within said enclosure at a location which is physically inaccessible to any unauthorized user of the personal computer system attempting to affect the state of said security feature element by insertion of a probe through said physical opening, anda system processor mounted within said enclosure and operatively connected with said security feature element for controlling access to data stored within the system by distinguishing between the secure and non-secure states of said element.

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