用C#实现DES加密解密解决URL参数明文的问题

啥也不说，直接上代码。
加密解码，封装到一个类，key可以自己修改。

using System; 
using System.Security.Cryptography; 
using System.Text; 
using System.IO; 
 
namespace Common 
...{ 
        /**//// <summary> 
        /// DESEncrypt加密解密算法。 
        /// </summary> 
        public sealed class DESEncrypt 
        ...{ 
                private DESEncrypt() 
                ...{ 
                        // 
                        // TODO: 在此处添加构造函数逻辑 
                        // 
                } 
 
                private static string key = "joke168"; 
 
                /**//// <summary> 
                /// 对称加密解密的密钥 
                /// </summary> 
                public static string Key 
                ...{ 
                        get 
                        ...{ 
                                return key; 
                        } 
                        set 
                        ...{ 
                                key = value; 
                        } 
                } 
 
                /**//// <summary> 
                /// DES加密 
                /// </summary> 
                /// <param name="encryptString"></param> 
                /// <returns></returns> 
                public static string DesEncrypt(string encryptString) 
                ...{ 
                        byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8)); 
                        byte[] keyIV = keyBytes; 
                        byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); 
                        DESCryptoServiceProvider provider = new DESCryptoServiceProvider(); 
                        MemoryStream mStream = new MemoryStream(); 
                        CryptoStream cStream = new CryptoStream(mStream, provider.CreateEncryptor(keyBytes, keyIV), CryptoStreamMode.Write); 
                        cStream.Write(inputByteArray, 0, inputByteArray.Length); 
                        cStream.FlushFinalBlock(); 
                        return Convert.ToBase64String(mStream.ToArray()); 
                } 
 
                /**//// <summary> 
                /// DES解密 
                /// </summary> 
                /// <param name="decryptString"></param> 
                /// <returns></returns> 
                public static string DesDecrypt(string decryptString) 
                ...{ 
                        byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8)); 
                        byte[] keyIV = keyBytes; 
                        byte[] inputByteArray = Convert.FromBase64String(decryptString); 
                        DESCryptoServiceProvider provider = new DESCryptoServiceProvider(); 
                        MemoryStream mStream = new MemoryStream(); 
                        CryptoStream cStream = new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write); 
                        cStream.Write(inputByteArray, 0, inputByteArray.Length); 
                        cStream.FlushFinalBlock(); 
                        return Encoding.UTF8.GetString(mStream.ToArray()); 
                } 
        } 
} 

　欢迎批评指正。