这是一个密码学的课程设计。里面包括SPN加密、线性密码分析、差分密码分析、改进的SPN、随机性检测、生成RSA算法的参数、实现RAS和文件加解密功能。使用的是gmp库。对于学习密码学很有参考价值。-It was a cryptography course design. Which includes SPN encryption, linear cryptanalysis, differential cryptanalysis, improved SPN, random testing, gen