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Method for making security systems more tamper resistant and a security system

  • US 6,441,733 B1
  • Filed: 06/16/2000
  • Issued: 08/27/2002
  • Est. Priority Date: 06/16/2000
  • Status: Active Grant
First Claim
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1. A method for making a security system more tamper resistant, the security system including a control processor and at least one detection circuit monitored by the control processor, the at least one detection circuit having at least one detector, the method comprising:

  • (a) monitoring at least one electrical reference characteristic selected from resistance, capacitance, impedance and inductance in the at least one detection circuit; and

    (b) generating random periodic changes to the at least one electrical reference characteristic in order to detect any tampering with the at least one electrical reference characteristic in the at least one detection circuit, said random periodic changes being generated internally by the security system.

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