Encrypt and Decrypt the XML file(XML 데이터 암호화)

// 데이터 암호화
public static string Encrypt (string toEncrypt)
{
  byte[] keyArray  = UTF8Encoding.UTF8.GetBytes ("12345678901234567890123456789012");

  // 256-AES key
  byte[] toEncryptArray   = UTF8Encoding.UTF8.GetBytes (toEncrypt);

  RijndaelManaged rDel  = new RijndaelManaged ();
  rDel.Key              = keyArray;
  rDel.Mode             = CipherMode.ECB;

  // http://msdn.microsoft.com/en-us/library/system.security.cryptography.ciphermode.aspx
  rDel.Padding   = PaddingMode.PKCS7;

  // better lang support
  ICryptoTransform cTransform  = rDel.CreateEncryptor ();

  byte[] resultArray   = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

  return Convert.ToBase64String (resultArray, 0, resultArray.Length);
}
 
 // 데이터 암호 해독
public static string Decrypt (string toDecrypt)
{
  byte[] keyArray  = UTF8Encoding.UTF8.GetBytes ("12345678901234567890123456789012");

  // AES-256 key
  byte[] toEncryptArray   = Convert.FromBase64String (toDecrypt);

  RijndaelManaged rDel  = new RijndaelManaged ();
  rDel.Key              = keyArray;
  rDel.Mode             = CipherMode.ECB;

  // http://msdn.microsoft.com/en-us/library/system.security.cryptography.ciphermode.aspx
  rDel.Padding    = PaddingMode.PKCS7;

  // better lang support
  ICryptoTransform cTransform  = rDel.CreateDecryptor ();

  byte[] resultArray   = cTransform.TransformFinalBlock (toEncryptArray, 0, toEncryptArray.Length);

  return UTF8Encoding.UTF8.GetString (resultArray);
}