Patent ID: 11893142
Assignee: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A digital fingerprint generation method of an integrated circuit, applicable to a digital fingerprint generation circuit, the digital fingerprint generation circuit comprising: a control unit, a first clock generator, a second clock generator, and a frequency detector, wherein the control unit is electrically coupled with the first clock generator and the second clock generator, and both of the first clock generator and the second clock generator are further electrically coupled with the frequency detector; the method comprising:
generating a first control word and a second control word and transmitting the first control word to the first clock generator and the second control word to the second clock generator by the control unit;
generating a first clock signal based on the first control word and transmitting the first clock signal to the frequency detector by the first clock generator;
generating a second clock signal based on the second control word and transmitting the second clock signal to the frequency detector by the second clock generator; and
generating a digital fingerprint of the integrated circuit based on the first clock signal and the second clock signal by the frequency detector;
wherein the first clock generator and the second clock generator have different manufacturing deviations, and both of the first control word and the second control word have an integer portion and a fraction portion.