置换密钥矩阵加密算法的改进

提出了对分组加密算法(RKM)的改进,主要包括密钥进化算法、特征因子子矩阵和密钥的分发与更新算法.密钥进化算法是特征因子子矩阵生成算法和密钥分发与更新算法的基本组件,由一个16字节的单字节数组(称为进化指针)和一个密钥矩阵计算一个新的密钥矩阵.特征因子子矩阵是把128 bit矩阵特征因子作为进化指针代入密钥进化算法计算而得.在引入特征因子子矩阵的基础上对算法流程进行了改进,使算法的加、解密完全对称.在不降低算法安全性的基础上减少了4轮异或运算,从而降低了运算量.在密钥进化算法的基础上设计了密钥的分发与更新算法,使算法无需每次传输密钥矩阵就能共享.

Enhancement of replacing key matrix encryption algorithm

The enhancement of the novel encryption algorithm replacing key matrix(RKM)is presented.The enhancement comprises: key evolution algorithm,characterization factor matrix,and the key distribution and update algorithm.Key evolution algorithm,which is the basic module of the characterization factor matrixcalculating algorithm and the key distribution and update algorithm,calculates a new key matrix from a 16-byte array(so-called "evolution pointer") and an old key matrix.Based on the characterization factor matrix,which is calculated from the 128 bit key matrix characterization factor,the enhancement of the encryption process is made.The encryption and the decryption process of the new algorithm is absolutely the same.The new algorithm omits 4 rounds XOR operations without harming the security of the algorithm.Using the key distribution and update algorithm,there is no need to transfer the key matrix every time.