Introduction to encoding and encryption algorithms

Encryption algorithm:

MD5

The full name of the (one-way hashing algorithm) is message-digest algorithm 5

MD5 algorithm principle

http://blog.csdn.net/forgotaboutgirl/article/details/7258109

Why do you say MD5 is not reversible?

https://www.zhihu.com/question/22651987

Base64

The principle of coding --Base64 coding

Http://www.cnblogs.com/chengxiaohui/articles/3951129.html

Aes

Vernacular Interpretation symmetric encryption algorithm VS asymmetric encryption algorithm

https://zhuanlan.zhihu.com/p/21336272

Symmetric encryption:

PlainText <-> keys <-> redaction

The common symmetric encryption algorithms are des, 3DES, AES, Blowfish, Idea, RC5, RC6.

Asymmetric encryption

First, a pairof keys, one called private key private key, one becomes public key

Distribute your public key to the user who wants to send you the ciphertext, and then the user encrypts the ciphertext using the public key , only use your private key to decrypt

This encryption algorithm is widely used, such asSSH, HTTPS, TLS, electronic certificate, electronic signature, electronic ID card and so on.

Introduction to encoding and encryption algorithms