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Ordinary round transformation operation unit, ordinary round transformation circuit and aes decryption circuit

A computing unit, round transformation technology, applied in the field of decryption, to achieve the effect of reducing the implementation area

Active Publication Date: 2021-03-05
ANHUI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides an AES decryption common round transformation circuit, which aims to solve the problem that the existing common round transformation circuits based on merge operations optimize the length of the critical path at the cost of increasing the circuit area

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  • Ordinary round transformation operation unit, ordinary round transformation circuit and aes decryption circuit
  • Ordinary round transformation operation unit, ordinary round transformation circuit and aes decryption circuit
  • Ordinary round transformation operation unit, ordinary round transformation circuit and aes decryption circuit

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] The arithmetic unit used for AES decryption operation includes: key addition arithmetic unit, inverse column mixed arithmetic unit, inverse row shift arithmetic unit and inverse byte replacement arithmetic unit, all of which are existing arithmetic units. The operational formulas of the above arithmetic units are as follows:

[0040] Assume that the input state matrix of the ordinary round transformation operation is:

[0041]

[0042] 1. Key plus operation unit

[0043] The key addition operation unit performs the key addition operation, the key addition operation is the same as the key...

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Abstract

The present invention belongs to the technical field of decryption, and provides a common round transform operation unit, a common round transform circuit and an AES decryption circuit. The common round transform unit proposed by the present invention for AES decryption, through the merging and synthesis operation of constant matrices, converts In the AES decryption algorithm, all the linear transformation operations in the ordinary round transformation are combined into two synthesis matrices. The synthesis matrix and the synthesis matrix can realize the critical path of the circuit, and can also reduce the circuit implementation area.

Description

technical field [0001] The invention belongs to the technical field of decryption, and provides a common round transformation operation unit, a common round transformation circuit and an AES decryption circuit. Background technique [0002] AES (Advanced Encryption Standard, Advanced Encryption Standard) is a new generation of block symmetric cipher algorithm formulated by the National Institute of Standards and Technology in 2001 to replace the original DES (Data Encryption Standard, Data Encryption Standard). [0003] At present, the AES encryption algorithm has been adopted by many international standard organizations. It is currently the most widely used block encryption algorithm. The data block length of the AES encryption algorithm is 128 bits, and the key length is 128, 192 and 256 bits. Called AES-128, AES-192, AES-256, the AES algorithm is an iterative algorithm, each iteration can be called a round transformation, the key length is different, and the number of rou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/06
CPCH04L9/0631
Inventor 张肖强王磊郑辛星郑群现王新航孙忠先
Owner ANHUI POLYTECHNIC UNIV