A Strong/Weak Hybrid PUF Circuit Against Model Attack

Abstract

The invention discloses a strong / weak hybrid PUF circuit for resisting model attack, comprising a control circuit and N PUF unit circuits with the same structure, wherein a PUF cell circuit includes astorage type random source, a linear feedback shift register, a serial-parallel module and an arbiter PUF, the clock side of the linear feedback shift register and the clock side of the serial-parallel block are connected to the clock signal, the input of the arbiter PUF is connected to an input signal, the output of the arbiter PUF is used to output the PUF output response, the 8-bit parallel output of the storage random source is connected to the 8-bit parallel input of the linear feedback shift register, the serial output terminal of the linear feedback shift register is connected with theserial input terminal of the serial-parallel module, the 16-bit parallel output terminal of the serial-parallel module is connected with the 16-bit parallel control terminal of the arbiter PUF, and the memory random source comprises eight memory cells with the same structure; the serial output terminal of the linear feedback shift register is connected with the serial input terminal of the serial-parallel module. The advantages are good randomness, uniqueness and security.

Description

technical field [0001] The invention relates to a PUF circuit, in particular to a strong / weak hybrid PUF circuit against model attack. Background technique [0002] With the advent of the digital information age, smart home, smart interconnection and digital dependence have become ubiquitous in daily life. Smart devices have become the carrier of smart applications, and the application of smart devices is becoming more and more common. These smart devices store a lot of personal private information, and the security vulnerabilities of smart devices cause personal and social risks. The security vulnerability of smart devices is mainly due to the low security of the hardware authentication key between smart devices, which is easy to be attacked by collecting a large number of keys and performing mathematical modeling. Therefore, the randomness and security of the key become the key elements of hardware authentication between smart devices. Physically unclonable functional ci...

AI Technical Summary

Problems solved by technology

Although this scheme increases the number of excitation corresponding pairs by combining the arbiter PUF and the ring oscillator, there are still problems that the excitation signal cannot be continuously generated, the number of excitation signals is insufficient, the number of generated responses is low, and the uniqueness is poor.

The above-mentioned physical unclonable function circuits all have low randomness of the generated data, which cannot defend against model attacks and low security.

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