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diff --git a/popcorn/Assets/AvoEx/AesEncryptor.meta b/popcorn/Assets/AvoEx/AesEncryptor.meta
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diff --git a/popcorn/Assets/AvoEx/AesEncryptor/AesEncryptor.cs b/popcorn/Assets/AvoEx/AesEncryptor/AesEncryptor.cs
new file mode 100644
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+++ b/popcorn/Assets/AvoEx/AesEncryptor/AesEncryptor.cs
@@ -0,0 +1,296 @@
+using UnityEngine;
+using System;
+using System.Text;
+using System.Security.Cryptography;
+using System.Linq;
+
+/* See the "http://avoex.com/avoex/default-license/" for the full license governing this code. */
+
+namespace AvoEx
+{
+    // based on http://stackoverflow.com/questions/165808/simple-two-way-encryption-for-c-sharp
+    public static class AesEncryptor
+    {
+        // only the 128, 192, and 256-bit key sizes are specified in the AES standard. https://en.wikipedia.org/wiki/Advanced_Encryption_Standard
+        const int keySize = 16; // keySize must be 16, 24 or 32 bytes.
+        const string keyString = "defaultKeyString"; // EDIT 'keyString' BEFORE RELEASE. keyString must be longer than keySize.
+        // DO NOT EDIT 'keySize, keyString' AFTER RELEASE YOUR PROJECT.
+        // if you change keyString, you can not decrypt saved data encrypted by old keyString.
+
+        // The size of the IV property must be the same as the BlockSize property divided by 8.
+        // https://msdn.microsoft.com/ko-kr/library/system.security.cryptography.symmetricalgorithm.iv(v=vs.110).aspx
+        const int IvLength = 16;
+
+        static readonly UTF8Encoding encoder;
+        static readonly AesManaged aes;
+
+        static AesEncryptor()
+        {
+            encoder = new UTF8Encoding();
+            aes = new AesManaged { Key = encoder.GetBytes(keyString).Take(keySize).ToArray() };
+            aes.BlockSize = IvLength * 8; // only the 128-bit block size is specified in the AES standard.
+        }
+
+        public static byte[] GenerateIV()
+        {
+            aes.GenerateIV();
+            return aes.IV;
+        }
+
+        #region PREPEND_VECTOR
+        /// <summary>
+        /// encrypt bytes with random vector. prepend vector to result.
+        /// </summary>
+        public static byte[] Encrypt(byte[] buffer)
+        {
+            aes.GenerateIV();
+            using (ICryptoTransform encryptor = aes.CreateEncryptor())
+            {
+                byte[] inputBuffer = encryptor.TransformFinalBlock(buffer, 0, buffer.Length);
+                return aes.IV.Concat(inputBuffer).ToArray();
+            }
+        }
+
+        /// <summary>
+        /// decrypt bytes, encrypted by Encrypt(byte[]).
+        /// </summary>
+        public static byte[] Decrypt(byte[] buffer)
+        {
+            byte[] iv = buffer.Take(IvLength).ToArray();
+            using (ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, iv))
+            {
+                return decryptor.TransformFinalBlock(buffer, IvLength, buffer.Length - IvLength);
+            }
+        }
+        #endregion PREPEND_VECTOR
+
+        #region CUSTOM_KEY
+        /// <summary>
+        /// not prepend vector to result. you must use DecryptIV(byte[], byte[]) to decrypt.
+        /// </summary>
+        public static byte[] EncryptIV(byte[] buffer, byte[] IV)
+        {
+            return EncryptKeyIV(buffer, aes.Key, IV);
+        }
+
+        /// <summary>
+        /// decrypt bytes, encrypted by EncryptIV(byte[], byte[]).
+        /// </summary>
+        public static byte[] DecryptIV(byte[] buffer, byte[] IV)
+        {
+            return DecryptKeyIV(buffer, aes.Key, IV);
+        }
+
+        public static byte[] EncryptKeyIV(byte[] buffer, byte[] key, byte[] IV)
+        {
+            using (ICryptoTransform encryptor = aes.CreateEncryptor(key, IV))
+            {
+                return encryptor.TransformFinalBlock(buffer, 0, buffer.Length);
+            }
+        }
+
+        public static byte[] DecryptKeyIV(byte[] buffer, byte[] key, byte[] IV)
+        {
+            using (ICryptoTransform decryptor = aes.CreateDecryptor(key, IV))
+            {
+                return decryptor.TransformFinalBlock(buffer, 0, buffer.Length);
+            }
+        }
+        #endregion CUSTOM_KEY
+
+        #region ENCRYPT_TO_STRING
+        // string
+        /// <summary>
+        /// encrypt string with random vector. prepend vector to result.
+        /// </summary>
+        public static string Encrypt(string unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(encoder.GetBytes(unencrypted)));
+        }
+
+        /// <summary>
+        /// decrypt string, encrypted by Encrypt(string).
+        /// </summary>
+        [Obsolete("Decrypt(string) has been made obsolete. Please use the DecryptString(string).")]
+        public static string Decrypt(string encrypted)
+        {
+            return DecryptString(encrypted);
+        }
+        public static string DecryptString(string encrypted)
+        {
+            return DecryptString(Convert.FromBase64String(encrypted));
+        }
+        public static string DecryptString(byte[] encrypted)
+        {
+            byte[] bytesDecrypted = Decrypt(encrypted);
+            return encoder.GetString(bytesDecrypted, 0, bytesDecrypted.Length);
+        }
+
+        /// <summary>
+        /// not prepend vector to result. you must use DecryptIV(string, byte[]) to decrypt.
+        /// </summary>
+        public static string EncryptIV(string unencrypted, byte[] vector)
+        {
+            return Convert.ToBase64String(EncryptIV(encoder.GetBytes(unencrypted), vector));
+        }
+
+        /// <summary>
+        /// decrypt string, encrypted by EncryptIV(string, byte[]).
+        /// </summary>
+        public static string DecryptIV(string encrypted, byte[] vector)
+        {
+            byte[] bytesDecrypted = DecryptIV(Convert.FromBase64String(encrypted), vector);
+            return encoder.GetString(bytesDecrypted, 0, bytesDecrypted.Length);
+        }
+
+        // bool
+        public static string Encrypt(bool unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static bool DecryptBool(string encrypted)
+        {
+            return DecryptBool(Convert.FromBase64String(encrypted));
+        }
+        public static bool DecryptBool(byte[] encrypted)
+        {
+            return BitConverter.ToBoolean(Decrypt(encrypted), 0);
+        }
+
+        // char
+        public static string Encrypt(char unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static char DecryptChar(string encrypted)
+        {
+            return DecryptChar(Convert.FromBase64String(encrypted));
+        }
+        public static char DecryptChar(byte[] encrypted)
+        {
+            return BitConverter.ToChar(Decrypt(encrypted), 0);
+        }
+
+        // double
+        public static string Encrypt(double unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static double DecryptDouble(string encrypted)
+        {
+            return DecryptDouble(Convert.FromBase64String(encrypted));
+        }
+        public static double DecryptDouble(byte[] encrypted)
+        {
+            return BitConverter.ToDouble(Decrypt(encrypted), 0);
+        }
+
+        // float
+        public static string Encrypt(float unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static float DecryptFloat(string encrypted)
+        {
+            return DecryptFloat(Convert.FromBase64String(encrypted));
+        }
+        public static float DecryptFloat(byte[] encrypted)
+        {
+            return BitConverter.ToSingle(Decrypt(encrypted), 0);
+        }
+
+        // int
+        public static string Encrypt(int unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+        public static int DecryptInt(string encrypted)
+        {
+            return DecryptInt(Convert.FromBase64String(encrypted));
+        }
+        public static int DecryptInt(byte[] encrypted)
+        {
+            return BitConverter.ToInt32(Decrypt(encrypted), 0);
+        }
+
+        // long
+        public static string Encrypt(long unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static long DecryptLong(string encrypted)
+        {
+            return DecryptLong(Convert.FromBase64String(encrypted));
+        }
+        public static long DecryptLong(byte[] encrypted)
+        {
+            return BitConverter.ToInt64(Decrypt(encrypted), 0);
+        }
+
+        // short
+        public static string Encrypt(short unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static short DecryptShort(string encrypted)
+        {
+            return DecryptShort(Convert.FromBase64String(encrypted));
+        }
+        public static short DecryptShort(byte[] encrypted)
+        {
+            return BitConverter.ToInt16(Decrypt(encrypted), 0);
+        }
+
+        // uint
+        public static string Encrypt(uint unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static uint DecryptUInt(string encrypted)
+        {
+            return DecryptUInt(Convert.FromBase64String(encrypted));
+        }
+        public static uint DecryptUInt(byte[] encrypted)
+        {
+            return BitConverter.ToUInt32(Decrypt(encrypted), 0);
+        }
+
+        // ulong
+        public static string Encrypt(ulong unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static ulong DecryptULong(string encrypted)
+        {
+            return DecryptULong(Convert.FromBase64String(encrypted));
+        }
+        public static ulong DecryptULong(byte[] encrypted)
+        {
+            return BitConverter.ToUInt64(Decrypt(encrypted), 0);
+        }
+
+        // ushort
+        public static string Encrypt(ushort unencrypted)
+        {
+            return Convert.ToBase64String(Encrypt(BitConverter.GetBytes(unencrypted)));
+        }
+
+        public static ushort DecryptUShort(string encrypted)
+        {
+            return DecryptUShort(Convert.FromBase64String(encrypted));
+        }
+        public static ushort DecryptUShort(byte[] encrypted)
+        {
+            return BitConverter.ToUInt16(Decrypt(encrypted), 0);
+        }
+        #endregion ENCRYPT_TO_STRING
+    }
+}
\ No newline at end of file
diff --git a/popcorn/Assets/AvoEx/AesEncryptor/AesEncryptor.cs.meta b/popcorn/Assets/AvoEx/AesEncryptor/AesEncryptor.cs.meta
new file mode 100644
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diff --git a/popcorn/Assets/AvoEx/AesEncryptor/readme.txt b/popcorn/Assets/AvoEx/AesEncryptor/readme.txt
new file mode 100644
index 00000000..39e4f57f
--- /dev/null
+++ b/popcorn/Assets/AvoEx/AesEncryptor/readme.txt
@@ -0,0 +1,63 @@
+----------------------------------------------------------------
+AesEncryptor
+
+simple AES encryptor C#.
+you can edit a key and key size to 128, 192 or 256 bits in AesEncrypt.cs
+default key size is 128 bits(16 bytes).
+
+ - encrypt/decrypt a byte array to a byte array.
+ - encrypt a supported data type to a string.
+ - decrypt a string to a supported data type.
+
+more informations:
+http://avoex.com
+https://www.facebook.com/avoexgames
+
+----------------------------------------------------------------
+How to use AesEncryptor
+
+Just one line to encrypt/decrypt.
+
+Encrypt
+	- call AvoEx.AesEncryptor.Encrypt(...) function returns a encrypted string or byte.
+
+Decrypt
+	- call AvoEx.AesEncryptor.Decrypt...(...) function returns a decrypted data.
+
+
+watch video tutorial.
+http://youtu.be/g4jzSald9Oo
+
+----------------------------------------------------------------
+supported data type
+
+ - byte[]
+ - bool
+ - char
+ - double
+ - float
+ - int
+ - long
+ - short
+ - uint
+ - ulong
+ - ushort
+
+
+-------------------------------------------------------
+version history
+
+1.0.44
+ - supporting Window phone 8.
+
+1.0.39
+ - added Decrypt...(byte[]) functions.
+
+1.0.25
+ - added readme.txt
+ 
+1.0.20
+ - added EncryptKeyIV, DecryptKeyIV function.
+
+1.0.15
+ - added ExampleAesEncryptor.
diff --git a/popcorn/Assets/AvoEx/AesEncryptor/readme.txt.meta b/popcorn/Assets/AvoEx/AesEncryptor/readme.txt.meta
new file mode 100644
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