A tamper detection system includes a trigger mechanism system and a detection
circuit
that operate in combination to protect an integrated circuit from attack. The detection
circuit connects to the trigger mechanism system that is basically a protective
mesh that consists of two separate loops of wire held in close proximity to each
other and an optional ground layer. The mesh is such that an attempted penetration
is highly likely to cause an open of either loop or a short of one loop to the
other. The detection system recognizes shorts and opens in the mesh. The detection
circuit is intended to be very simple in its operation it that it does not require
a sophisticated stimulus and response set to operate. It is designed to be polled
on a regular basis for indications of a change in its operation.
