Patent ID: 11889001
Assignee: UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. A physically unclonable function device, comprising:
an array of optical interferometers having inputs for light entering thereinto and outputs for light exiting therefrom;
an arrangement of successive columns of said optical interferometers wherein each successive column comprises one additional interferometer relative to the immediately preceding column;
light paths exiting any optical interferometer in a preceding column into two optical interferometers in the immediately succeeding column;
light paths exiting optical interferometers comprising the last column of optical interferometers being connected to the outputs of said array;
light paths entering the first column of optical interferometers being connected to the inputs of said array; and
wherein tuning any of said optical interferometers controls the presence of light that is output from said array.