Mask operation method and device of SM2 algorithm

Abstract

The invention belongs to the technical field of SM2 cryptographic algorithms, and particularly relates to a mask operation method and device of an SM2 algorithm, the mask operation method masks a random number k in [k] G operation by presetting a point and a random number, and the [k] G calculation in the SM2 algorithm operation process specifically comprises the following steps: presetting a point P0 = [nr] G and a first random number r in a chip; wherein P0 is a point on a finite field elliptic curve, n is an order of the elliptic curve, and G is a base point on the elliptic curve; a secondrandom number d is generated in the chip, and a generation point P1 = [d] G is calculated; a third random number k = dr is calculated and generated through the first random number r and the second random number d; A point P2 = [k] G = [dr] G = [d] G [r] G = [d] G + [nr] G = P0 + P1 is generated by calculation. The mask operation device comprises a preset module, a random number generation module,a random number operation module, a point multiplication operation module and a point addition operation module; the cracking difficulty of real parameter information k and power consumption analysisacquisition information can be enhanced, and power consumption analysis attacks can be effectively coped with.

Description

technical field [0001] The invention belongs to the technical field of SM2 encryption algorithm, and in particular relates to a mask operation method and device of the SM2 algorithm with high security, small calculation amount and fast processing speed. Background technique [0002] With the continuous development of cryptography and computing technology, the currently commonly used 1024-bit public key encryption algorithm RSA is facing serious threats. Due to the advantages of SM2 algorithm, such as high security, small amount of calculation, and fast processing speed, our national encryption management department has studied it. It was decided to replace the RSA algorithm with the SM2 elliptic curve cryptographic algorithm. Compared with the RSA algorithm, under the premise of achieving the same security strength, the key length required by the SM2 algorithm is shorter, and the hardware implementation is simpler. [0003] The SM2 cryptographic algorithm is theoretically v...

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Problems solved by technology

[0003] The SM2 cryptographic algorithm is theoretically very safe, but in the implementation process, it is necessary to take into account the newly emerging cryptographic analysis methods in recent years. The side-channel attack of the key information poses a serious threat to the security of the cryptog...

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