CPC H04L 9/3278 (2013.01) [G06F 21/75 (2013.01); H04L 9/0877 (2013.01)] | 12 Claims |
1. An operation method of a physical unclonable function (PUF) cell device including a plurality of PUF cells, the method comprising:
selecting a first target PUF cell of the plurality of PUF cells;
applying a first voltage to a first word line connected with the first target PUF cell;
generating a first target value based on a first target current corresponding to the first target PUF cell and generating a first central value based on a first sum current corresponding to a sum of first currents output from first PUF cells, connected with the first word line, of the plurality of PUF cells;
determining a first target bit of the first target PUF cell based on the first target value and the first central value; and
generating a security key based on the first target bit for responding to an authentication request.
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