哈工大信息安全实验二，密码学应用与实践。实现不完美但是可以用。-Experiment II HIT information security, cryptography, application and practice. Implementation is not perfect but you can use.

通过编程实现位移密码的密钥获取并解密，加深对古典密码体系的了解，为以后深入学习密码学奠定基础。(Shift cipher analysis experiment (including source code))