C# 对密码等数据进行对称性加密解密

类：

 /// <summary>
 /// DESEncrypt加密解密算法。
 /// </summary>
 public class DESEncrypt
 {
         private DESEncrypt()
         {
             //
             // TODO: 在此处添加构造函数逻辑
             //
         }

         //自定义口令
         private static string key = "XluK7kDuA9yptTks";

         /// <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)
         {
             try
             {
                 byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(, ));
                 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, , inputByteArray.Length);
                 cStream.FlushFinalBlock();
                 return Convert.ToBase64String(mStream.ToArray());
             }
             catch (Exception)
             {
                 return "";
             }
         }

         /// <summary>
         /// DES解密
         /// </summary>
         /// <param name="decryptString"></param>
         /// <returns></returns>
         public static string DesDecrypt(string decryptString)
         {
             try
             {
                 byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(, ));
                 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, , inputByteArray.Length);
                 cStream.FlushFinalBlock();
                 return Encoding.UTF8.GetString(mStream.ToArray());
             }
             catch (Exception)
             {
                 return "";
             }
         }
     }

调用：

 //加密
 string account=DESEncrypt.DesEncrypt(“account”);
 //解密
 account=DESEncrypt.DesDecrypt(account);