Side channel energy analysis method and device for HMAC (Hash-based Message Authentication Code)-SM3 cryptographic algorithm

Abstract

The invention provides a side channel energy analysis method and a device for a HMAC (Hash-based Message Authentication Code)-SM3 cryptographic algorithm. The method comprises steps: the value of first key data Kin is analyzed and acquired; the value of second key data Kout is analyzed and acquired; and according to the acquired value of the first key data Kin and the value of the second key data Kout, a message digest is generated. The step of analyzing and acquiring the value of the first key data Kin comprises sub steps: a message group M is inputted to a cryptographic module; energy consumption information generated during the process of processing each inputted message by the cryptographic module is acquired; when j=1, (A1 xor B1) and (E1 xor F1) are firstly selected as analysis objects, and values of variables B1 and F1 are acquired respectively; (A1 xor B1 xor C1) and (E1 xor F1 xor G1) are then selected as analysis objects, and values of variables C1 and G1 are acquired respectively. When the method of the invention is used for acquiring the first key data, the decryption success rate can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of data analysis, in particular to a side channel energy analysis method and device of an HMAC-SM3 cryptographic algorithm. Background technique [0002] Cryptographic hash algorithms are widely used in digital signature and verification, message authentication code generation and verification, and random number generation, etc., which meet the security requirements of various cryptographic applications. Among them, the SM3 cryptographic algorithm is the earliest cryptographic hash algorithm published in my country, and it is widely used. [0003] Hash-based Message Authentication code (HMAC) based on cryptographic hash algorithm uses cryptographic hash algorithm, takes a key and message as input, and outputs a message digest with authentication information. The receiver of the message digest can verify the identity of the sender of the message digest and the validity of the message according to the authent...

AI Technical Summary

Problems solved by technology

Because the Hamming distance model is more suitable for the cryptographic module of the HMAC-SM3 cryptographic algorithm implemented in hardware, but for the cryptographic module implemented in software, if the Hamming distance model is used to crack the key, it is difficult to crack, and the success rate is low

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