新型非等分Feistel网络数据加密算法  

Novel Data Cryptography Using Unequal Dichotomy Feistel Network

作　　者：张勇 吴文华 唐颖军 ZHANG Yong;WU Wen-hua;TANG Ying-jun(School of Software and Internet-of-Things Engineering,Jiangxi University of Finance and Economics,Nanchang 330013,China)

机构地区：[1]江西财经大学软件与物联网工程学院,南昌330013

出　　处：《小型微型计算机系统》2023年第10期2127-2136,共10页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61762043)资助;江西省教育厅科学技术研究项目(GJJ210507,GJJ190249)资助.

摘　　要：数据加密是对称密码学的重要研究分支,是物联网信息安全的主要技术手段.在数据加密标准(DES)的Feistel网络基础上,提出了一种高效的非等分Feistel网络.基于非等分Feistel网络提出了一种加密算法与解密算法共享的数据密码系统.该数据密码系统采用512比特长的外部密钥,使用混沌系统作为密钥发生器,明文数据和密文数据长度相同,均为512比特.在相同的软硬件条件和Wolfram程序下,提出的数据密码系统的加密与解密速度比DES、密钥长度为256比特的高级加密标准(AES)和SM4算法更快,同时,提出的数据密码算法和3种常用数据加密标准具有同等级别的雪崩效应,系统敏感性指标的相对误差小于0.5%.提出的数据密码算法可用于智能卡身份数据加密和物联网终端低密度数据加密.Data encryption is a cardinal research branch of symmetric cryptography and the fundamental technical means of information security in the Internet of things.Based on the Feistel network of data encryption standard(DES),an efficient unequal dichotomy Feistel network is proposed.A data cryptosystem sharing the encryption algorithm and decryption algorithm is proposed using the non-dichotomy Feistel network.The data cryptography uses a 512-bit long external key and a chaotic system as key generator.The lengths of plaintext data and cipher-text data are the same,both with 512 bits.Under the same hardware and software conditions and with Wolfram program,the encryption and decryption speeds of proposed data cryptosystem are faster than those of DES,advanced encryption standard(AES)with a 256-bit long key and SM4 algorithm.Meanwhile,the proposed data cryptography has the same level of avalanche effect as the three common data encryption standards,and has a relative error of less than 0.5%of the system sensitivity index.The proposed data cryptography can be applied for smartcard identity data encryption and low-density data encryption of Internet-of-things terminals.

关 键 词：数据加密 FEISTEL网络 雪崩效应 对称密码 混沌系统 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]