Random mixed encryption system for resisting energy analysis and implementation method thereof

Abstract

The invention discloses a random mixed encryption system for resisting energy analysis and an implementation method of the random mixed encryption system, belonging to the information safety field. The system adopts an integral design scheme from top to bottom, comprising a pseudorandom sequence PN128 generation module, an S-box updating module, a mask correction generation module, a plaintext input register, a pseudorandom sequence PN64 generation module, a gate circuit A, a gate circuit B, a Storage Management Services4 (SMS4) encryption module, an Advanced Encryption Standard (AES) encryption module, a multiplexer and a ciphertext output register. The random mixed encryption system for resisting energy analysis and the implementation method of the random mixed encryption system, are firstly proposed, the plaintext is encrypted by random adoption of the AES or SMS4 algorithm based on the mask technology through the pseudorandom sequence PN64, and all basic circuit units in algorithm hardware implementation are realized by a symmetric circuit, therefore, simple and differential energy analysis is radically eliminated; the encryption system has multiple working modes and is suitable for different scenes.

Description

technical field [0001] The invention relates to side-channel attack protection technology, encryption circuit design technology and circuit power consumption equalization technology in high-speed data encryption technology, and belongs to the field of information security, in particular to a random hybrid encryption system resistant to energy analysis and an implementation method thereof. Background technique [0002] With the rapid development of computer technology and communication technology, people pay more and more attention to the issue of information security. Various new encryption technologies are constantly emerging, and attacks against the cryptographic algorithm itself and its implementation equipment are also emerging in an endless stream. Side channel attacks are an effective means to crack cryptographic devices, including time analysis attacks, power consumption attacks, and electromagnetic radiation analysis attacks. Among various side-channel attack techniq...

AI Technical Summary

Problems solved by technology

At present, the main methods used to resist side channel attacks include masking technology, balanced Hamming weight, and the use of two capacitors (one is charged by an external power source, and the other is powered by an encryption device), etc. However, the current technologies at home and abroad have the following deficiencies Advantages: (1) Although the mask is introduced, there is no guarantee that all intermediate results are protected by the mask, and there is still a chance that careful attackers will find the vulnerability; (2) Even if some technical means are used to balance the Hamming Weight, but it is difficult to make the power consumption curve of each encryption independent of the key; (3) Introducing two capacitors into an encryption device is not universal for general hardware devices (such as FPGA)

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