Anti-attack block cipher encryption method for multi-scene application

Abstract

The invention relates to an anti-attack block cipher encryption method for multi-scene application. Firstly, a group of random numbers generated by a random number module are pre-stored in a register, plaintexts are encrypted by designing two groups of round functions at the same time, and irrelevant data are encrypted by using irrelevant secret keys to interfere a power consumption curve of a current chip while the correct plaintexts are encrypted, so that the power consumption curve acquired by an attacker contains irrelevant power consumption, and the analysis difficulty of the power consumption curve is increased; meanwhile, a random pseudo wheel is inserted into 10-round encryption in normal operation, so that a fault injection attack is prevented; when no attacker attacks, the two groups of round functions can be used at the same time, two groups of plaintexts are encrypted at the same time, and the encryption speed is increased.

Description

technical field [0001] The invention belongs to the field of embedded micro-controllers, and proposes a block cipher encryption method capable of preventing attacks to a certain extent. Background technique [0002] With the wide-scale application of smart devices, data security in the process of data encryption will be considered by people, and how to defend against attacks by attackers in the process of encryption will be an important aspect of data security. The encryption algorithm has been verified by rigorous mathematical reasoning when it was proposed, and it is confirmed that it is irreversible in the case of known ciphertext, but in the actual implementation of the encryption process, it is always accompanied by other loopholes, which can be obtained after simple analysis key. [0003] With the information leakage during the encryption process, attackers have developed many attack methods such as energy attack and fault attack. Therefore, the defense in the encrypt...

AI Technical Summary

Problems solved by technology

[0003] With the information leakage during the encryption process, attackers have developed many attack methods such as energy attack and fault attack. Therefore, the defense in the encryption process is an important part of the defense process. There are different defense methods for different attack methods. , for some defense methods may introduce new loopholes, this paper uses interference and insertion methods to make it difficult for attackers to obtain effective information

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