Physical unclonable function circuit and operation method thereof

Abstract

The invention discloses a physical unclonable function circuit and an operation method thereof, and belongs to the field of circuit design. The physical unclonable function circuit comprises a control module, a memristor array and a comparison amplification circuit, wherein the control module is used for selecting memristor units in the ith row and the jth column and memristor units in the ith row and the (j+1)th column in the memristor array based on an externally input excitation signal, conducting the ith row of the memristor array, applying a high level signal to the jth column of the memristor array, applying a low level signal to the (j+1)th column of the memristor array, and enabling the rest columns to be in a suspended state, so that the selected memristor units form a series circuit to perform voltage division operation. The source line output of the ith row of the memristor array is a voltage division signal at the middle voltage division point of the series circuit; the comparison amplification circuit is used for comparing the voltage division signal with the reference voltage to obtain a response signal. The circuit is not affected by crosstalk current, the accuracy of the response result is high, and the bit error rate is greatly reduced.

Description

technical field [0001] The invention belongs to the field of circuit design, and more specifically relates to a physically unclonable function circuit and an operation method thereof. Background technique [0002] With the rapid development of electronic technology and the Internet of Things (IoT), the security of hardware terminals has attracted more and more attention. Now encryption algorithms and terminals have problems such as poor computing power and limited resources; and the keys obtained by traditional encryption algorithms are all It can be easily invaded and tampered by a third party, and it is very easy to be cracked by intrusive attacks, which makes the security performance of the device unable to be guaranteed. Therefore, a higher level of security application is required to ensure that the key is unpredictable and uniquely random. The entropy source can be stored safely and reliably, so the concept of physically unclonable functions is proposed. [0003] Phys...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a physically unclonable function circuit and its operation method to solve the low accuracy of the response results in the prior art due to the influence of crosstalk current question

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