diff --git a/v2rayN/ServiceLib/Common/AesUtils.cs b/v2rayN/ServiceLib/Common/AesUtils.cs
deleted file mode 100644
index dec56742..00000000
--- a/v2rayN/ServiceLib/Common/AesUtils.cs
+++ /dev/null
@@ -1,115 +0,0 @@
-using System;
-using System.IO;
-using System.Security.Cryptography;
-using System.Text;
-
-namespace ServiceLib.Common
-{
-    public class AesUtils
-    {
-        private const int KeySize = 256; // AES-256
-        private const int IvSize = 16;   // AES block size
-        private const int Iterations = 10000;
-
-        private static readonly byte[] Salt = Encoding.ASCII.GetBytes("saltysalt".PadRight(16, ' '));//google浏览器默认盐值
-
-        /// <summary>
-        /// Encrypt
-        /// </summary>
-        /// <param name="text">Plain text</param>
-        /// <param name="password">Password for key derivation</param>
-        /// <returns>Base64 encoded cipher text with IV</returns>
-        public static string Encrypt(string text, string password)
-        {
-            if (string.IsNullOrEmpty(text))
-                return string.Empty;
-
-            if (string.IsNullOrEmpty(password))
-                throw new ArgumentNullException("Password cannot be null.");
-
-            byte[] plaintext = Encoding.UTF8.GetBytes(text);
-            byte[] key = GetDefaultKey(password);
-            byte[] iv = GenerateIv();
-
-            using (Aes aes = Aes.Create())
-            {
-                aes.Key = key;
-                aes.IV = iv;
-
-                using (MemoryStream ms = new MemoryStream())
-                {
-                    ms.Write(iv, 0, iv.Length);
-
-                    using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
-                    {
-                        cs.Write(plaintext, 0, plaintext.Length);
-                        cs.FlushFinalBlock();
-                    }
-
-                    byte[] cipherTextWithIv = ms.ToArray();
-                    return Convert.ToBase64String(cipherTextWithIv);
-                }
-            }
-        }
-
-        /// <summary>
-        /// Decrypt
-        /// </summary>
-        /// <param name="cipherTextWithIv">Base64 encoded cipher text with IV</param>
-        /// <param name="password">Password for key derivation</param>
-        /// <returns>Plain text</returns>
-        public static string Decrypt(string cipherTextWithIv, string password)
-        {
-            if (string.IsNullOrEmpty(cipherTextWithIv))
-                return string.Empty;
-
-            if (string.IsNullOrEmpty(password))
-                throw new ArgumentNullException("Password cannot be null.");
-
-            byte[] cipherTextWithIvBytes = Convert.FromBase64String(cipherTextWithIv);
-            byte[] key = GetDefaultKey(password);
-
-            byte[] iv = new byte[IvSize];
-            Buffer.BlockCopy(cipherTextWithIvBytes, 0, iv, 0, IvSize);
-
-            byte[] cipherText = new byte[cipherTextWithIvBytes.Length - IvSize];
-            Buffer.BlockCopy(cipherTextWithIvBytes, IvSize, cipherText, 0, cipherText.Length - IvSize);
-
-            using (Aes aes = Aes.Create())
-            {
-                aes.Key = key;
-                aes.IV = iv;
-
-                using (MemoryStream ms = new MemoryStream())
-                {
-                    using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Write))
-                    {
-                        cs.Write(cipherText, 0, cipherText.Length);
-                        cs.FlushFinalBlock();
-                    }
-
-                    byte[] plainText = ms.ToArray();
-                    return Encoding.UTF8.GetString(plainText);
-                }
-            }
-        }
-
-        private static byte[] GetDefaultKey(string password)
-        {
-            using (Rfc2898DeriveBytes pbkdf2 = new Rfc2898DeriveBytes(password, Salt, Iterations, HashAlgorithmName.SHA256))
-            {
-                return pbkdf2.GetBytes(KeySize / 8);
-            }
-        }
-
-        private static byte[] GenerateIv()
-        {
-            using (RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider())
-            {
-                byte[] iv = new byte[IvSize];
-                rng.GetBytes(iv);
-                return iv;
-            }
-        }
-    }
-}