Mixed physical unclonable function structure and SBOX masking method

Abstract

The invention discloses a mixed physical unclonable function structure and an SBOX masking method, and belongs to the field of digital integrated circuit design and robot safety. The mask method provided by the invention is suitable for grouping encryption and decryption algorithms such as AES, DES, SM4 and the like which use the SBOX to carry out nonlinear transformation, and the reconfigurable SBOX which is realized by carrying out parameterization on the SBOX of the algorithms. The mixed PUF is formed by splicing response results of the basic PUF and the environment sensing PUF through bits, and the mixed PUF is of a PUF structure based on an SR latch and can generate unique output according to in-chip and off-chip environment characteristics; the SBOX mask method is based on the existing random mask method, and mask and compensation are respectively carried out on SBOX input and output by further adding a mixed PUF response result, so that not only can power consumption attack be resisted, but also chip-level anti-counterfeiting is supported.

Description

Technical field [0001] The present invention belongs to the design of digital integrated circuitry and robot security, and more particularly to a mixed physical unaccessible function structure and SBOX mask method. Background technique [0002] In grouping decomposition algorithms, such as AES, DES, SM4, etc., nonlinear step SBOX is an important part of ensuring process security. In the circuit, the 0, 1 flip operation of the data causes the corresponding capacitor charge and discharge to generate different power consumption change information, so that the power consumption information in the statistical process can be derived by the power consumption information in the statistical process. The crack of the algorithm is implemented by power attack. The mainstream anti-power attack scheme of the current algorithm is to mask the clear text and the key by the random number, so that the data flip in different operations is the same, thereby masking the power consumption characteristi...

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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