对称加密:
DES(Data Encryption Standard), 1976, 容易被破解,不安全
AES(Advanced Encryption Standard or Rijndael), around 2001,目前最流行
aes-128|192|256
非对称加密(public-key cryptography)
RSA: Rivest-Shamir-Adleman
原文地址:http://www.cnblogs.com/zzSoftware/p/3758728.html