private string Decrypt(byte[] data)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
des.Key = _desKey;
des.IV = _desIV;
byte[] decryptedData = des.CreateDecryptor().TransformFinalBlock(data, 0, data.Length);
return ASCIIEncoding.ASCII.GetString(decryptedData);
}