private const string AesIV256 = "IVFBWjJXU1gjRURDNFJGVg==";
        private const string AesKey256 = "ZzRtNDNuY3J5cHRrM3kuLi4=";//"UzNtM25jcnlwdGszeS4uLg==";



        public static string Encrypt(string text)
        {
            var sToEncrypt = text;
            var rj = new RijndaelManaged()
            {
                Padding = PaddingMode.Zeros,
                Mode = CipherMode.ECB,
                KeySize = 256,
                BlockSize = 256
            };


            var key = Convert.FromBase64String(AesKey256);
            var IV = Convert.FromBase64String(AesIV256);

            var encryptor = rj.CreateEncryptor(key, IV);

            var msEncrypt = new MemoryStream();
            var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);

            var toEncrypt = Encoding.UTF8.GetBytes(sToEncrypt);

            csEncrypt.Write(toEncrypt, 0, toEncrypt.Length);
            csEncrypt.FlushFinalBlock();

            var encrypted = msEncrypt.ToArray();

            return (Convert.ToBase64String(encrypted));
        }

private final static String SecretKey  = "g4m43ncryptk3y..";
public CryptoHelper() {
    //ivspec = new IvParameterSpec(Base64.decode(ivector.getBytes(),Base64.DEFAULT));
    keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");


    try {
        cipher = Cipher.getInstance("AES/ECB/ZeroBytePadding");
    } catch (NoSuchAlgorithmException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

private byte[] decryptInternal(String code) throws Exception {
    if (code == null || code.length() == 0) {
        throw new Exception("Empty string");
    }

    byte[] decrypted = null;
    byte[] newDecrypted=null;
    try {

        cipher.init(Cipher.DECRYPT_MODE, keyspec);
        //decrypted = cipher.doFinal(Base64.decode(code,Base64.DEFAULT));
        decrypted= Base64.decode(code,Base64.DEFAULT);
        newDecrypted= cipher.doFinal(decrypted);

    } catch (Exception e) {
        throw new Exception("[decrypt] " + e.getMessage());
    }
    return newDecrypted;
}