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Mechanisms for detecting tampering of an electronic device

  • US 8,278,948 B2
  • Filed: 03/10/2010
  • Issued: 10/02/2012
  • Est. Priority Date: 08/10/2009
  • Status: Active Grant
First Claim
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1. An electronic device comprising:

  • a chassis;

    a printed wiring board (PWB) having a hole, a fastener installed in the hole thereby securing the PWB to the chassis, the PWB having formed therein a pair of conductive traces, and a cap being an amount of conductive glue covering a part of the fastener and filling electrically insulating gaps between each trace and the fastener to thereby form a conductive path that connects the two traces; and

    a sensing circuit coupled to the pair of traces to detect a change in impedance of the path and in response, signal an alert to a data processor that evaluates and logs tamper events in the electronic device.

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