C#实现加密的几种方法介绍

//DES加密 

        private static string DESPWD(string ciphertext)

        {

            string desPWD = "";

            byte[] buffer;

            DESCryptoServiceProvider DesCSP = new DESCryptoServiceProvider();

            MemoryStream ms = new MemoryStream();//先创建 一个内存流

            CryptoStream cryStream = new CryptoStream(ms, DesCSP.CreateEncryptor(), CryptoStreamMode.Write);//将内存流连接到加密转换流

            StreamWriter sw = new StreamWriter(cryStream);

            sw.WriteLine(ciphertext);//将要加密的字符串写入加密转换流

            sw.Close();

            cryStream.Close();

            buffer = ms.ToArray();//将加密后的流转换为字节数组

            desPWD = Convert.ToBase64String(buffer);//将加密后的字节数组转换为字符串

            return desPWD;

        }