RC4加密算法改进研究及电路设计  

Improvement of RC4 encryption algorithm and circuit design

作　　者：雷文媛 夏宏[1] 师瑞峰[1] LEI Wen-yuan;XIA Hong;SHI Rui-feng(School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206

出　　处：《计算机工程与设计》2024年第9期2561-2568,共8页Computer Engineering and Design

基　　金：中央高校基本科研业务费专项资金基金项目(2023JC007)。

摘　　要：针对软件实现RC4算法易遭受攻击且效率不高的问题,基于硬件电路实现算法的思想,引入快速伪随机数发生器提出一种改进RC4并设计电路实现。结合种子密钥和伪随机数进行字节内部与字节间的置乱改进初始化算法,提高算法安全性;设计消耗更少时钟周期的电路生成密钥流,提升加密效率。NIST检测显示改进RC4的密钥流序列随机性优于现存基于硬件的RC4产生的密钥流,仿真结果表明,电路能够完成正确加解密。To address the vulnerability and inefficiency issues of software implementation of the RC4 algorithm,based on the idea of using hardware circuit to implement algorithm,an improved RC4 was proposed by incorporating a fast pseudo random number generator and the circuit was designed.The algorithm security was significantly enhanced by incorporating a seed key and pseu-dorandom numbers for both intra-byte and inter-byte shuffling in the improved initialization process.The circuit that consumed less clock cycles was designed to generate key stream,which greatly improved the encryption efficiency.NIST testing indicates that the keystream sequences generated using the improved RC4 exhibits superior randomness compared to existing hardware-based RC4 implementations.Simulation results demonstrate that the circuit successfully accomplishes correct encryption and decryption.

关 键 词：加密算法 流密码 伪随机数发生器 密钥流随机性 硬件加密 混合进位加法器 随机性检测 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]