Encrypting and deciphering system for realizing SMS4 algorithm

An encryption, decryption and algorithm technology, which is applied in the field of encryption and decryption systems, can solve the problem of high component redundancy and achieve the effect of reducing component redundancy
CN101764685AInactive Publication Date: 2010-06-30GCI SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
GCI SCI & TECH
Publication Date
2010-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of block cipher algorithm of wireless local network, and provides an encrypting and deciphering system for realizing SMS4 algorithm; the encrypting and deciphering system comprises a first operation module and a first-stage production line of a first storing module, a second operation module and a second -stage production line of a second storing module and a third operation module and a third -stage production line of a third storing module. The three operation modules in the technical scheme of the invention realize functional reuse for encryption and decryption operation and round key spreading operation, thereby directly reducing component redundancy and reducing the occupied area of the system. Moreover, the invention adopts three-stage production line structure to deal with three groups of data simultaneously, and in which any group of data can be the encryption and decryption operation or the round key spreading operation, so as to improve system efficiency.
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Description

technical field

[0001] The invention relates to the field of block cipher algorithms for wireless local area networks, and specifically proposes an encryption and decryption system for realizing the SMS4 algorithm. Background technique

[0002] The SMS4 cryptographic algorithm is the first commercial cryptographic algorithm for wireless LAN products announced in China. This algorithm is the first public cryptographic algorithm for a special field in my country. It is of great significance to the wireless local area network industry and commercial cryptographic research. SMS4 is a block symmetric cipher algorithm based on S-box, which encrypts and decrypts a set of bit data. The block length of this algorithm is 128 bits, and the key length is 128 bits. Both the encryption algorithm and the key expansion algorithm adopt a 32-round nonlinear iterative structure.

[0003] The encryption algorithm is mainly the process of reading the encrypted and decrypted data and the round k...

Claims

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