本篇内容简要介绍BASE64、MD5、SHA、HMAC几种加密算法。

BASE64编码算法不算是真正的加密算法。

MD5、SHA、HMAC这三种加密算法，可谓是非可逆加密，就是不可解密的加密方法，我们称之为单向加密算法。我们通常只把他们作为加密的基础。单纯的以上三种的加密并不可靠。 -This brief introduction to the contents of BASE64, MD5, SHA, HMAC several encryption algorithms. BASE64 encoding algorithm is not a real encryption algorithm. MD5, SHA, HMAC three encryption algorithms can be described as non-reversible encryption and decryption of the encryption method is not, we call one-way encryption algorithm. We usually put them as the basis for encryption. These three simple encryption is not reliable.