Surge:一种新型、低资源、高效的轻量级分组密码算法

摘要

目前,适合资源约束的轻量级密码算法已成为研究热点.提出一种低资源、高性能与高安全性的新轻量级分组密码算法Surge.Surge密码分组长度为64位,使用64位、80位和128位3种密钥长度,且基于SPN结构.轮函数分为5个模块,密钥扩展模块采用无扩展方式;轮常数加模块采用0到15的数字组合成轮常数,构造高效且高度混淆的轮常数加变换;列混合模块利用易于硬件实现的(0,1,2,4)组合矩阵,从而可以在有限域GF(24)上构造硬件实现友好型矩阵.将Surge算法在FPGA上进行了实现,实验结果表明,相对于目前SPN结构的轻量级密码算法,Surge算法占用的面积资源更小,同时有着良好的加密性能;安全性实验证明了Surge可以有效抗差分与线性攻击、代数攻击.%Lightweight cryptography algorithm has become a hot research.The paper presented a new lightweight block cipher algorithm named Surge.Surge has low resource,high performance and high security.Block length of Surge cipher is 64 bits.Its variable key uses 64,80 or 128-bit length.Surge is based on the SPN structure.The round function is divided into 5 modules.Key expansion module is no expansion.Round-constants add module uses 0 to 15 to combine so that it can achieve efficient and highly confused round-constrants add operation.MixColumn module uses (0,1,2,4) to composite hardware-friendly matrix on the GF (24).Low resource and highly efficient of Surge is attained by this novel design.Surge is implemented and downloaded in FPGA.Experimental results show that it has smaller area resources and better cryptographic properties.The security expriment proves that surge can be against differential and linear attacks,algebraic attacks.