Multi-factor physically unclonable function key, coin, or rfid

A magnetic reader device with mechanical cut detection in a pin tumbler comprising:

• a magnetometer embedded in the pin tumbler;
• mechanical lock pins;
• a slot to guide the insertion of the key;
• one or more magnetometer sensors to read the three-dimensional magnetic field at the tip of the key;
• one or more magnetometer sensors to read the three-dimensional magnetic field along one or both sides of the key;
• and
• one or more magnetometer sensors to read the three-dimensional magnetic field along the cuts of the key.

A multi-factor authentication system comprising:

• a key that contains a physical unclonable function (PUF) matrix material of pre-magnetized flakes in a nonmagnetic base material, wherein the the material is molded or cut into a key-shape;
• an electronic magnetometer reader located within a core keyway to read the tip or along one or more surfaces of the key shape that measures the magnetic field orientation and magnitude of the pre-magnetized flakes;
• a single source of light emission within the core keyway to illuminate the key;
• and
• a single point optical sensing system that measures the light transmission through the key or the reflectivity.