A hybrid physical unclonable function structure and sbox masking method

Abstract

The invention discloses a mixed physical unclonable function structure and an SBOX masking method, belonging to the fields of digital integrated circuit design and robot safety. The masking method of the present invention is applicable to AES, DES, SM4 and other packet encryption and decryption algorithms using SBOX for nonlinear transformation, as well as reconfigurable SBOX realized by parameterizing the SBOX of the above algorithm. Among them, the mixed PUF is the basic PUF and the response result of the environment-aware PUF after bit splicing. They are all PUF structures based on SR latches, which can generate unique outputs according to the internal and external environmental characteristics of the chip; the SBOX masking method is based on the existing There is a random masking method, by further adding mixed PUF response results to mask and compensate at the SBOX input and output, so as to not only resist power consumption attacks, but also support chip-level anti-counterfeiting.

Description

technical field [0001] The invention belongs to the field of digital integrated circuit design and robot safety, and more specifically relates to a hybrid physical unclonable function structure and an SBOX masking method. Background technique [0002] In packet encryption and decryption algorithms, such as AES, DES, SM4, etc., the non-linear step SBOX is an important part to ensure process security. In the circuit, the 0 and 1 flip operation of the data will cause the corresponding capacitor to charge and discharge to generate different power consumption change information, so the key of the encryption and decryption process can be deduced through a large number of data operations and statistics of the power consumption information in the process , that is, to crack the algorithm through power consumption attack. At present, the mainstream anti-power attack scheme of the algorithm is to mask the plaintext and the key with random numbers, so that the probability of data flip...

AI Technical Summary

Problems solved by technology

[0003] At the same time, in some specific application scenarios, such as in embedded robots, by dismantling the genuine device chip that has been scrapped but the chip function is still normal, and assembling it with some low-cost peripherals with similar functions, it is possible to crack the chip without cracking the chip. Product counterfeiting, and currently there is no good active anti-counterfeiting measures

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