This invention uses magnetic fields and magnetic sensors to detect backside attack intrusions. If the magnetic part is removed or damaged, the magnetic sensor ...
A magnetoresistive or Hall effect sensor placed in a given location close to or on the device makes it possible to detect movement of the walls and domains, ...
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... US patent- US20100283456 Magnetic detection of back-side layer Google Search. 13. John Walker, Itsik Mantin, US patent - US 7,966,666 Chip attack protection ...
