AES (Advanced Encryption Standard) encryption method and power attack resisting method based on the same

Abstract

The invention discloses an AES (Advanced Encryption Standard) encryption method and a power attack resisting method based on the same; the AES encryption method comprises the following steps: grouping clear data; carrying out XOR operation on an input and an expanded secret key of a round function; carrying out data replacement with an S box having an 8-bit input and a 32-bit output; shifting 32-bit data output by the S box; carrying out the XOR operation correspondingly on the 32-bit data output by row shifting operation; carrying out the XOR operation on the expanded secret key; carrying out the data replacement with the S box having the 8-bit input and the 8-bit output; carrying out the XOR operation with the expanded secret key; and outputting encrypted data. The invention has the following advantages: the operations needed by each of the steps in the encryption method only have table look-up, shifting and XOR, so the logic implementation is relatively simple and efficient; and the power attack resisting method has mixcolumn, so the power attack resisting effect is good.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to an AES encryption method and an anti-power consumption attack method based on and. Background technique [0002] With the development of informatization, information security issues are becoming more and more important. People have proposed various cryptographic algorithms in this process. Among these various cryptographic algorithms, AES (Advanced Encryption Standard, Advanced Encryption Standard) is widely used all over the world. It is used and has become an internationally common symmetric encryption algorithm. With its advantages of short key establishment time, high sensitivity, and low memory requirements, it is widely used in information security fields, such as e-commerce and communication encryption. [0003] As people analyze the AES algorithm at various levels, there are many ways to attack and crack the AES algorithm. Among the many attack methods, the p...

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Problems solved by technology

[0008] However, the existing methods of resisting power consumption attacks on AES are mainly designed for traditional AES implementation schemes, and there is a lack of anti power consumption attack strategies for this kind of non-column confusion and more efficient encryption implementation process.

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