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Security device for stored sensitive data

  • US 4,691,350 A
  • Filed: 06/23/1986
  • Issued: 09/01/1987
  • Est. Priority Date: 10/30/1985
  • Status: Expired due to Term
First Claim
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1. A security device for protecting stored sensitive data comprising:

  • a closed housing containing memory means adapted to store sensitive data including conductive path means and conductive sheet means;

    said conductive path means including a plurality of interconnected first and second conductive path segments;

    said conductive sheet means including a plurality of interconnected conductive sheets;

    each of said first conductive path segments, an associated second conductive path segment and an associated conductive sheet being arranged in superposed relationship and being separated by insulating material;

    and tamper detection circuitry connected to said conductive path means and said conductive sheet means including a reset signal generating means arranged to provide a reset signal to erase the contents of said memory means in the event of interruption of said conductive path means or electrical interconnection between said conductive path means and said conductive sheet means brought about by an attempt to penetrate said housing.

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