Epic Mnemonic Decryption

The attached EpicRequest class is an example of the decryption process required to ascertain an Epic Hyperspace Mnemonic Encryption service’s decrypted value.

class EpicRequest
    {
        public string Decrypt(string encryptedUser)
        {
            var  xusr = "";
            try
            {
                var keyValue = WebConfigurationManager.AppSettings["SharedSecret"];        
                var userByte = new byte[32];
                Array.Copy(Encoding.UTF8.GetBytes(encryptedUser), userByte, 0);
                xusr = Decryptor(encryptedUser, keyValue);
            }
            catch (Exception e)
            {
                Console.WriteLine("Error: {0}", e.Message);
            }
            return xusr;
        }
        public static string Decryptor(string TextToDecrypt, string strKey)
        {
            byte[] EncryptedBytes = Convert.FromBase64String(TextToDecrypt);
            string strIV = "0000000000000000";          
            AesCryptoServiceProvider aesProvider = new AesCryptoServiceProvider();
            aesProvider.BlockSize = 128;
            aesProvider.KeySize = 128;

            aesProvider.Key = string2byte(strKey);
            aesProvider.IV = string2byte(strIV);
            aesProvider.Padding = PaddingMode.PKCS7;
            aesProvider.Mode = CipherMode.ECB;

            ICryptoTransform cryptoTransform = aesProvider.CreateDecryptor(aesProvider.Key, aesProvider.IV);
            byte[] DecryptedBytes = cryptoTransform.TransformFinalBlock(EncryptedBytes, 0, EncryptedBytes.Length);
            return Encoding.UTF8.GetString(DecryptedBytes);
        }

        public static byte[] string2byte(string newString)
        {
            char[] CharArray = newString.ToCharArray();
            byte[] ByteArray = new byte[CharArray.Length];

            for (int i = 0; i < CharArray.Length; i++)
            {
                ByteArray[i] = Convert.ToByte(CharArray[i]);
            }
            return ByteArray;
        }

        public static byte[] stringToByte(string newString, int charLength)
        {
            char[] CharArray = newString.ToCharArray();
            byte[] ByteArray = new byte[charLength];
            for (int i = 0; i < CharArray.Length; i++)
            {
                ByteArray[i] = Convert.ToByte(CharArray[i]);
            }
            return ByteArray;
        }
    }