MD5算法，应用于网络安全，密码学方面的知识，加密解密算法，自己写的，仅供参考-MD5 algorithm used in network security, knowledge of cryptography, encryption and decryption algorithms, wrote it myself, for reference only

3des加密解密算法，网络安全密码学的知识，初学者刚刚写的，仅供参考-3des encryption and decryption algorithms, network security knowledge of cryptography, beginners just written, for reference