Physically Unclonable Function Circuits and Methods of Performing Key Enrollment in Physically Unclonable Function Circuits

摘要

A key enrollment method of a physically unclonable function (PUF) circuit including a plurality of PUF cells includes receiving a first level key from PUF cells, performing bit encoding on the first level key using a bit coding table based on Hamming weights of a plurality of bits in the first level key to generate a second level key, storing first helper data associated with the second level key in a non-volatile memory, performing block encoding on the second level key using an error correction code to generate a third level key, and storing second helper data associated with the third level key in the non-volatile memory.

主权项

1. A method of performing key enrollment for a physically unclonable function (PUF) circuit including a plurality of PUF cells, the method comprising;
receiving a first level key from the PUF cells, the first level key comprising a plurality of key values, each of the key values comprising a plurality of bits; performing bit encoding on the first level key using a bit coding table based on Hamming weights of the plurality of bits in the key values of the first level key to generate a second level key; storing first helper data associated with the second level key in a non-volatile memory; performing block encoding on the second level key using an error correction code to generate a third level key; and storing second helper data associated with the third level key in the non-volatile memory.