c#md5加密的简单用法

using System.Security.Cryptography;

//MD5 md5 = MD5.Create();

MD5 md5 = new MD5CryptoServiceProvider();

byte[] buffer = Encoding.Default.GetBytes(str);

byte[] bufferStr = md5.ComputeHash(buffer);

string md5Str = "";

foreach (byte item in bufferStr)

{

md5Str += item.ToString("x2");

}

return md5Str;

加密的还有des可逆对称加密，RSA非对称加密  数字整数ssl