#1楼 得分：0回复于：2009-12-26 15:37:26
加密有很多种方法.同时C#也提供了很多加密方法.你需要加密和解密在加密算法上需要使用对称加密.我给你提供一个简单的算法.在保存的时候可以使用二进制的方式来保存到文件.
C# code
using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;
namespace Tools
{
/// <summary>
/// 加密
/// </summary>
public class AES
{
//默认密钥向量
private static byte[] Keys = { 0x18, 0x72, 0x65, 0x79, 0x6F, 0x57, 0x6D, 0x79, 0x35, 0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };
/// <summary>
/// 设置加密密匙向量
/// </summary>
public static byte[] IV
{
set { Keys = value; }
get { return Keys; }
}
/// <summary>
/// AES加密数据
/// </summary>
/// <param name="encryptString">需要加密的数据</param>
/// <param name="encryptKey">加密密匙</param>
/// <returns>加密后的数据</returns>
public static string Encode(string encryptString, string encryptKey)
{
encryptKey = Utils.GetSubString(encryptKey, 32, "");
encryptKey = encryptKey.PadRight(32, ' ');
RijndaelManaged rijndaelProvider = new RijndaelManaged();
rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
rijndaelProvider.IV = IV;
ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();
byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);
return Convert.ToBase64String(encryptedData);
}
/// <summary>
/// AES解密
/// </summary>
/// <param name="decryptString">需要解密的数据</param>
/// <param nam
