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SCENERY:a lightweight block cipher based on feistel structure

Frontiers of Computer Science 2022年第3期16卷 193-202页

作者： Jingya FENG Lang LI Hunan Provincial Key Laboratory of Intelligent Information Processing and Application Hengyang Normal UniversityHengyang 421002China College of Information Science and Engineering Hunan Normal UniversityChangsha 410081China College of Computer Science and Technology Hengyang Normal UniversityHengyang 421002China

In this paper,we propose a new lightweight block cipher called *** main purpose of SCENERY design applies to hardware and software *** is a 64-bit block cipher supporting 80-bit keys,and its data processing consists of 28 *** round function of SCENERY consists of 84×4 S-boxes in parallel and a 32× 32 binary matrix,and we can implement SCENERY with some basic logic *** hardware implementation of SCENERY only requires 1438 GE based on 0.18 um CMOS technology,and the software implementation of encrypting or decrypting a block takes approximately 1516 clock cycles 0118-bit microcontrollers and 364 clock cycles on 64-bit *** with other encryption algorithms,the performance of SCENERY is well balanced for both hardware and *** the security analyses,SCENERY can achieve enough security margin against known attacks,such as differential cryptanalysis,linear cryptanalysis,impossible differential cryptanalysis and related-key attacks.

关键词： lightweight block cipher feistel structure cryptanalysis internet of things

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Quantum key-recovery attack on feistel structures

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Science China(Information Sciences) 2018年第10期61卷 240-246页

作者： Xiaoyang DONG Xiaoyun WANG Institute for Advanced Study Tsinghua University Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationShandong University

Post-quantum cryptography has drawn considerable attention from cryptologists on a global scale. At Asiacrypt 2017, Leander and May combined Grover’s and Simon’s quantum algorithms to break the FX-based block ciphers, which were introduced by Kilian and Rogaway to strengthen DES. In this study,we investigate the feistel constructions using Grover’s and Simon’s algorithms to generate new quantum key-recovery attacks on different rounds of feistel constructions. Our attacks require 2quantum queries to break an r-round feistel construction. The time complexity of our attacks is less than that observed for quantum brute-force search by a factor of 2. When compared with the best classical attacks, i.e.,Dinur et al.’s attacks at CRYPTO 2015, the time complexity is reduced by a factor of 2without incurring any memory cost.

关键词： quantum cryptanalysis quantum key-recovery feistel structure Simon Grover

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Confidential Communication Through Chaos Encryption in Wireless Sensor Network

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Journal of China University of Mining and Technology 2007年第2期17卷 258-261页

作者： CHEN Shuai ZHONG Xian-xin Electronic Staff Room of Physics Department Huainan Normal University Huainan Anhui 232001 China Key Laboratory of Optoelectronic Technology ＆ System Under State Ministry of Education Chongqing University Chongqing 400030 China

A new byte block cipher algorithm with discrete chaos and feistel structure has been studied for confidential communication in wireless sensor network to improve security. After permutation,the byte block was encrypted through a feistel structure in multiple turns and afterwards replaced again. The child keys are the composite sequence of discrete chaos and linear congruence sequences. Both the plain text and cipher text are of 8 bits. The number of keys is alterable. A nonlinear encryption function in the feistel structure with chaos was constructed. The cipher algorithm was realized in the Micaz node,and the confidential communication experiment in wireless sensor network was completed success-fully. Additional ROM memory required for the cipher algorithm is 4144 bytes and an additional RAM memory 61 bytes. The cipher algorithm is nonlinear chaos and the feistel structure holds the best of the RC6,DES and SKIPJACK cipher *** result shows that the algorithm needs a little memory and is safe at a high level.

关键词： algorithm encryption chaos wireless sensor network feistel structure

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