Method for preventing injection attack of high-level encryption standard coprocessor

Abstract

The embodiment of the invention relates to a method for preventing an injection attack of a high-level encryption standard coprocessor. The method comprises the following steps: initializing encryption and decryption path state words; obtaining a first plaintext and a first key, and generating a first check code and a second check code; generating a second plaintext and a key; performing first anti-injection check on the second plaintext and the first check code; performing second anti-injection check on the second key and the second check code; generating a first ciphertext and a third checkcode according to the second plaintext and the key; generating a second ciphertext, and performing third anti-injection check on the second ciphertext and the third check code; performing fourth anti-injection verification; carrying out fifth anti-injection verification; and performing sixth anti-injection check on the encryption and decryption path state word. The data verification is set at eachread-write operation of physical read-write, and the data verification is set before and after each key task node of the application layer, so that the purpose of preventing the injection attack is achieved, and the injection prevention process is ensured not to be subjected to the injection attack by setting the encryption and decryption path state words.

Description

technical field [0001] The invention relates to the technical field of single-chip microcomputers, in particular to a method for preventing injection attack of an Advanced Encryption Standard coprocessor. Background technique [0002] The Advanced Encryption Standard (Advance Encryption Standard, abbreviation: AES) coprocessor has been widely used in secure computing single-chip microcomputers, and is mainly used to improve the data encryption and decryption capabilities of the single-chip microcomputers. The purpose of the injection attack on the coprocessor is to destroy the data of its internal storage unit through injection means, resulting in miscalculation in the execution of the algorithm. The existing injection attack objects are mainly for injection damage to the internal data storage space of the coprocessor. Contents of the invention [0003] The purpose of the present invention is to provide an AES coprocessor anti-injection attack method for the existing tech...

AI Technical Summary

Problems solved by technology

The purpose of the injection attack on the coprocessor is to destroy the data of its internal storage unit through injection means, resulting in miscalculation in the execution of the algorithm.

Existing injection attack objects are mainly aimed at injecting damage to the internal data storage space of the coprocessor

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