Reconfigurable S box circuit structure based on RAM (Radom Access Memory) sharing technology

Abstract

The invention discloses a reconfigurable S box circuit structure based on a RAM (Radom Access Memory) sharing technology, which can realize S box substitution operation in various block cipher algorithms and is suitable for various block cipher processors. The S box circuit structure consists of a configuration unit circuit and a substitution unit circuit, wherein the configuration unit is used for receiving and storing input control signals and configurating and controlling the operation state of the substitution unit; the substitution unit comprises n substitution elements and a RAM, and all substitution elements work in parallel and share one RAM. The invention has the advantages of high operation speed, flexible configuration, capability of processing data in parallel, small memory unit occupation and small circuit realization area.

Description

Technical field [0001] The present invention relates to the fields of information security technology and integrated circuit technology, and in particular to a reconfigurable S-box circuit structure based on RAM sharing technology, which is used to implement the S-box replacement operation in a block cipher algorithm. Background technique [0002] With the increasing informatization, digitization and networking of modern society, people's demand for information security technology has become more extensive and deeper. The application field of information security technology has gradually expanded from traditional military and political departments to all corners of social and economic life; information security products have become an important guarantee for the sound operation of the entire society, and the protection of information security has also become an important science and technology field. Subject. In the information security system, cryptographic algorithms are the f...

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Problems solved by technology

[0006] To sum up, in the prior art, the S-box based on the logic circuit has the disadvantages of slow calculation speed and lack of configurability; the S-box based on the look-up table occupies many storage units, the circuit implementation area is large, and it does not have Drawbacks in the ability to process data in parallel

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