Tamper protection mesh in an electronic device

An electronic device comprising:

• an electrical circuit;
• a housing that encloses the electrical circuit;
• a first conductor affixed to an interior surface of the housing;
• a first detector coupled to the first conductor, to detect a first electrical condition associated with the first conductor, the first electrical condition indicative of tampering with the housing;
• and
• a multiplexer coupled to receive a plurality of inputs, each of which is coupled to a separate one of a plurality of contacts on the first conductor, the multiplexer configured to respond to a first control signal by selecting a first one of the plurality of inputs via which the first detector is to monitor for the first electrical condition and to respond to a second control signal by selecting a second one of the plurality of inputs via which the first detector is to monitor for the first electrical condition, wherein each of the first control signal and the second control signal is generated based on a randomness function.

A method of detecting tampering in an electronic device, the method comprising:

• receiving a signal from each of a plurality of contacts on a metal loop, the metal loop being affixed to an interior surface of a housing of the electronic device;
• generating each of a first control signal and a second control signal based on a randomness function;
• in response to the first control signal, selecting a first one of the received signals to monitor for a first electrical condition;
• in response to the second control signal, selecting a second one of the received signals to monitor for the first electrical condition;
• monitoring for the first electrical condition on the metal loop;
• permitting an operation to be performed by the electronic device while said monitoring does not detect the first electrical condition on the metal loop;
• and
• disabling the operation in response to detecting the first electrical condition on the metal loop.