密码保存到INI文件加密的问题

Question

一个用户登录界面 保存密码后把这个密码加密保存到ini文件
然后读出解密来验证
有什么比较好的方法用于这种加密呢?
呵呵
刚刚接触程序设计,大家多多指导~~

Answer 1

MD5就可以了
另外。NET中也有加密的算法

Answer 2

MD5不能解密（且不说理论上的事），可以用DES、RSA等类来实现，msdn里有例子

Answer 3

建议使用DES或者RSA，这是真的加密。MD5是哈希值，不是真的加密，散列而已贴一个DES的方法给你：// 初始化DES加密的密钥和一个随机的、8比特的初始化向量(IV)
private byte[] key_8 = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
private byte[] IV_8 = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef};
/// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="rgbKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <param name="rgbIV">密钥向量</param>
/// <returns>解密成功返回解密后的字符串，失败返源字符串</returns>
private string DES_Decrypt(string decryptString, byte[] rgbKey, byte[] rgbIV)
{
try
{
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
} /// <summary>
/// TripleDES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="rgbKey">密钥</param>
/// <param name="rgbIV">密钥向量</param>
/// <returns>加密成功返回加密后的字符串，失败则返回源字符串</returns>
private string TripleDES_Encrypt(string encryptString, byte[] rgbKey, byte[] rgbIV)
{
try
{
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
TripleDESCryptoServiceProvider dCSP = new TripleDESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
}

Answer 4

不好意思，ls贴错误了，贴成了三重DES了
应该是这个:// 初始化DES加密的密钥和一个随机的、8比特的初始化向量(IV)
private byte[] key_8 = {0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef};
private byte[] IV_8 = {0x12, 0x34, 0x56, 0x78, 0x90, 0xab, 0xcd, 0xef};
/// <summary>
/// DES加密字符串
/// </summary>
/// <param name="encryptString">待加密的字符串</param>
/// <param name="rgbKey">加密密钥,要求为8位</param>
/// <param name="rgbIV">密钥向量</param>
/// <returns>加密成功返回加密后的字符串，失败返回源字符串</returns>
private string DES_Encrypt(string encryptString, byte[] rgbKey, byte[] rgbIV)
{
try
{
byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Convert.ToBase64String(mStream.ToArray());
}
catch
{
return encryptString;
}
} /// <summary>
/// DES解密字符串
/// </summary>
/// <param name="decryptString">待解密的字符串</param>
/// <param name="rgbKey">解密密钥,要求为8位,和加密密钥相同</param>
/// <param name="rgbIV">密钥向量</param>
/// <returns>解密成功返回解密后的字符串，失败返源字符串</returns>
private string DES_Decrypt(string decryptString, byte[] rgbKey, byte[] rgbIV)
{
try
{
byte[] inputByteArray = Convert.FromBase64String(decryptString);
DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
MemoryStream mStream = new MemoryStream();
CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
catch
{
return decryptString;
}
}