diff --git a/Falcon.Extend/AESCryptoService.cs b/Falcon.Extend/AESCryptoService.cs
new file mode 100644
index 0000000..78d330c
--- /dev/null
+++ b/Falcon.Extend/AESCryptoService.cs
@@ -0,0 +1,82 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Falcon.Extend
+{
+    /// <summary>
+    /// AES加密服务
+    /// </summary>
+    public class AESCryptoService:ICryptoService
+    {
+        /// <summary>
+        /// 用AES加密字符串
+        /// </summary>
+        /// <param name="content">明文</param>
+        /// <param name="key">关键字</param>
+        /// <returns>密文</returns>
+        public string Encrypt(string content,string key) {
+            var encryptKey = GetDecryptKey(key);
+            using(var aesAlg = Aes.Create()) {
+                using(var encryptor = aesAlg.CreateEncryptor(encryptKey,aesAlg.IV)) {
+                    using(var msEncrypt = new MemoryStream()) {
+                        using(var csEncrypt = new CryptoStream(msEncrypt,encryptor,CryptoStreamMode.Write))
+                        using(var swEncrypt = new StreamWriter(csEncrypt)) {
+                            swEncrypt.Write(content);
+                        }
+                        var iv = aesAlg.IV;
+                        var decryptedContent = msEncrypt.ToArray();
+                        var result = new byte[iv.Length + decryptedContent.Length];
+                        Buffer.BlockCopy(iv,0,result,0,iv.Length);
+                        Buffer.BlockCopy(decryptedContent,0,result,iv.Length,decryptedContent.Length);
+                        return Convert.ToBase64String(result);
+                    }
+                }
+            }
+        }
+        /// <summary>
+        /// AES解密
+        /// </summary>
+        /// <param name="content">密文</param>
+        /// <param name="key">关键字</param>
+        /// <returns>明文</returns>
+        public string Decrypt(string content,string key) {
+            var fullCipher = Convert.FromBase64String(content);
+            var iv = new byte[16];
+            var cipher = new byte[fullCipher.Length - iv.Length];
+            Buffer.BlockCopy(fullCipher,0,iv,0,iv.Length);
+            Buffer.BlockCopy(fullCipher,iv.Length,cipher,0,fullCipher.Length - iv.Length);
+            var decryptKey = GetDecryptKey(key);
+            using(var aesAlg = Aes.Create()) {
+                using(var decryptor = aesAlg.CreateDecryptor(decryptKey,iv)) {
+                    string result;
+                    using(var msDecrypt = new MemoryStream(cipher)) {
+                        using(var csDecrypt = new CryptoStream(msDecrypt,decryptor,CryptoStreamMode.Read)) {
+                            using(var srDecrypt = new StreamReader(csDecrypt)) {
+                                result = srDecrypt.ReadToEnd();
+                            }
+                        }
+                    }
+                    return result;
+                }
+            }
+        }
+
+        /// <summary>
+        /// 格式化加密key长度
+        /// </summary>
+        /// <param name="key">加密用的key</param>
+        /// <param name="keyLength">格式化长度</param>
+        /// <returns>加密key字节数组</returns>
+        protected byte[] GetDecryptKey(string key,int keyLength = 32) {
+            var buf = new byte[keyLength];
+            var ek = Encoding.UTF8.GetBytes(key);
+            var len = keyLength > ek.Length ? ek.Length : buf.Length;
+            for(var i = 0;i < len;i++) {
+                buf[i] = ek[i];
+            }
+            return buf;
+        }
+    }
+}
diff --git a/Falcon.Extend/ICryptoService.cs b/Falcon.Extend/ICryptoService.cs
new file mode 100644
index 0000000..ff4f7e9
--- /dev/null
+++ b/Falcon.Extend/ICryptoService.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Falcon.Extend
+{
+    /// <summary>
+    /// 数据加密解密接口
+    /// </summary>
+    public interface ICryptoService
+    {
+        /// <summary>
+        /// 使用指定的key加密内容
+        /// </summary>
+        /// <param name="content">要加密的明文</param>
+        /// <param name="key">加密key</param>
+        /// <returns>加密后的密文</returns>
+        string Encrypt(string content,string key);
+        /// <summary>
+        /// 使用指定的key解密内容
+        /// </summary>
+        /// <param name="content">要解密的密文</param>
+        /// <param name="key">key</param>
+        /// <returns>解密后的明文</returns>
+        string Decrypt(string content,string key);
+    }
+}
diff --git a/Falcon.ExtendTests/AESCryptoServiceTests.cs b/Falcon.ExtendTests/AESCryptoServiceTests.cs
new file mode 100644
index 0000000..a0d3b84
--- /dev/null
+++ b/Falcon.ExtendTests/AESCryptoServiceTests.cs
@@ -0,0 +1,28 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Falcon.Extend;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Falcon.Extend.Tests
+{
+    [TestClass()]
+    public class AESCryptoServiceTests
+    {
+        [TestMethod()]
+        public void EncryptTest() {
+            ICryptoService service = new AESCryptoService();
+            var mw = new string[] { "abc","123","中文明文","中英文混编123abc","+-*/ _=-`~!@#$%^&*()" };
+            var keys = new string[] { Guid.NewGuid().ToString("N"),"123","0123456789012345678901234567890123456789" };
+            for(int i = 0;i < mw.Length;i++) {
+                for(int y = 0;y < keys.Length;y++) {
+                    var mwn = mw[i];
+                    var k = keys[y];
+                    var miw = service.Encrypt(mwn,k);
+                    var mwn1 = service.Decrypt(miw,k);
+                    Assert.AreEqual(mwn,mwn1,$"明文有变化{k}_{mwn}{mwn1}");
+                }
+            }
+        }
+    }
+}
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