AES Encryption/Decryption Circuit Based on Data Redundancy Real-time Error Detection Mechanism

Abstract

The invention discloses a circulating-unfolded-structured AES encryption / decryption circuit based on a data redundancy real-time error detection mechanism, and is used for resisting fault injection attacks or used for improving circuit reliability in an extreme application environment. The circuit comprises two parts of an AES encryption / decryption unit and a detecting unit, wherein the AES encryption / decryption unit adopts the circulating-unfolded structure, and is formed by Nk round transformation units and an alternative selector; the detecting unit is composed of Nk comparators. The AES encryption / decryption unit adopts the data redundancy processing technology in the data processing process, utilizes two adjacent round transformation units to perform the same operation on each group of data twice; the comparators in the detecting unit compare the results of the two operations; the AES encryption / decryption unit works normally if the operation results are the same; the AES encryption / decryption unit generates an error if the results are different. Compared with the conventional structural redundancy error detection mechanism, the adoption of data redundancy error detection mechanism can greatly reduce the circuit area.

Description

technical field [0001] The invention belongs to the technical field of cryptographic circuit realization, and in particular relates to an AES encryption / decryption circuit with a loop expansion structure based on a data redundancy real-time error detection mechanism. Background technique [0002] AES (Advanced Encryption Standard, Advanced Encryption Standard) is a new generation of block symmetric cipher algorithm developed by the National Institute of Standards and Technology in 2001 to replace the original DES (Data Encryption Standard, Data Encryption Standard). The data packet length of the AES encryption algorithm is 128 bits, and there are three kinds of key lengths: 128, 192 and 256 bits. AES stipulates that according to these three different key lengths, the encryption process requires 10, 12, and 14 rounds of round transformation operations, and each round transformation operation includes byte replacement, row shifting, column mixing, and key addition. sub-operat...

AI Technical Summary

Problems solved by technology

The fully expanded structure uses the N r +1 wheel conversion circuit unit, the circuit area is large, but the data does not need to be fed back, and the data processing speed is high

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