In this paper, the encryption process of SMS4 algorithm is briefly introduced, the orthomorphic character and the correctness of encryption and decryption of improved algorithm are validated in detail, the paper also compared improved algorithm with SMS4 Algorithm in security and occupancy of resources.
本文简要介绍了SMS4密码算法的加解密原理,提出了一个对SMS4算法的改进方案,并详细对该改进方案进行了正形性以及加解密正确性的验证,同时对该方案的安全性以及资源占用情况与SMS4算法进行了对比分析。