在System.Security.Cryptography中使用TripleDESCryptoServiceProvider:

public static class CryptoHelper
{
    private const string Key = "MyHashString";
    private static TripleDESCryptoServiceProvider GetCryproProvider()
    {
        var md5 = new MD5CryptoServiceProvider();
        var key = md5.ComputeHash(Encoding.UTF8.GetBytes(Key));
        return new TripleDESCryptoServiceProvider() { Key = key, Mode = CipherMode.ECB, Padding = PaddingMode.PKCS7 };
    }

    public static string Encrypt(string plainString)
    {
        var data = Encoding.UTF8.GetBytes(plainString);
        var tripleDes = GetCryproProvider();
        var transform = tripleDes.CreateEncryptor();
        var resultsByteArray = transform.TransformFinalBlock(data, 0, data.Length);
        return Convert.ToBase64String(resultsByteArray);
    }

    public static string Decrypt(string encryptedString)
    {
        var data = Convert.FromBase64String(encryptedString);
        var tripleDes = GetCryproProvider();
        var transform = tripleDes.CreateDecryptor();
        var resultsByteArray = transform.TransformFinalBlock(data, 0, data.Length);
        return Encoding.UTF8.GetString(resultsByteArray);
    }
}

我认为这是世界上最简单的一个!

string encrypted = "Text".Aggregate("", (c, a) => c + (char) (a + 2));

Test

 Console.WriteLine(("Hello").Aggregate("", (c, a) => c + (char) (a + 1)));
            //Output is Ifmmp
 Console.WriteLine(("Ifmmp").Aggregate("", (c, a) => c + (char)(a - 1)));
            //Output is Hello

我清理了SimpleAES(上图)供我使用。固定复杂的加密/解密方法;用于编码字节缓冲区、字符串和url友好字符串的分离方法;利用现有的库进行URL编码。

代码更小，更简单，更快，输出更简洁。例如，johnsmith@gmail.com产生:

SimpleAES: "096114178117140150104121138042115022037019164188092040214235183167012211175176167001017163166152"
SimplerAES: "YHKydYyWaHmKKnMWJROkvFwo1uu3pwzTr7CnARGjppg%3d"

代码:

public class SimplerAES
{
    private static byte[] key = __Replace_Me__({ 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 });

    // a hardcoded IV should not be used for production AES-CBC code
    // IVs should be unpredictable per ciphertext
    private static byte[] vector = __Replace_Me_({ 146, 64, 191, 111, 23, 3, 113, 119, 231, 121, 221, 112, 79, 32, 114, 156 });

    private ICryptoTransform encryptor, decryptor;
    private UTF8Encoding encoder;

    public SimplerAES()
    {
        RijndaelManaged rm = new RijndaelManaged();
        encryptor = rm.CreateEncryptor(key, vector);
        decryptor = rm.CreateDecryptor(key, vector);
        encoder = new UTF8Encoding();
    }

    public string Encrypt(string unencrypted)
    {
        return Convert.ToBase64String(Encrypt(encoder.GetBytes(unencrypted)));
    }

    public string Decrypt(string encrypted)
    {
        return encoder.GetString(Decrypt(Convert.FromBase64String(encrypted)));
    }

    public byte[] Encrypt(byte[] buffer)
    {
        return Transform(buffer, encryptor);
    }

    public byte[] Decrypt(byte[] buffer)
    {
        return Transform(buffer, decryptor);
    }

    protected byte[] Transform(byte[] buffer, ICryptoTransform transform)
    {
        MemoryStream stream = new MemoryStream();
        using (CryptoStream cs = new CryptoStream(stream, transform, CryptoStreamMode.Write))
        {
            cs.Write(buffer, 0, buffer.Length);
        }
        return stream.ToArray();
    }
}

命名空间System.Security.Cryptography包含TripleDESCryptoServiceProvider类和RijndaelManaged类

不要忘记添加对系统的引用。安全大会。

多年后，我回来对他们说:不要这样做!看XOR加密有什么问题?获取详细信息。

一种非常简单的双向加密是异或加密。

Come up with a password. Let's have it be mypass. Convert the password into binary (according to ASCII). The password becomes 01101101 01111001 01110000 01100001 01110011 01110011. Take the message you want to encode. Convert that into binary, also. Look at the length of the message. If the message length is 400 bytes, turn the password into a 400 byte string by repeating it over and over again. It would become 01101101 01111001 01110000 01100001 01110011 01110011 01101101 01111001 01110000 01100001 01110011 01110011 01101101 01111001 01110000 01100001 01110011 01110011... (or mypassmypassmypass...) XOR the message with the long password. Send the result. Another time, XOR the encrypted message with the same password (mypassmypassmypass...). There's your message!

马克斯(优秀)答案的变体

添加“使用” 将类设置为IDisposable 删除URL编码代码以简化示例。 添加一个简单的测试装置来演示使用方法

希望这能有所帮助

[TestFixture]
public class RijndaelHelperTests
{
    [Test]
    public void UseCase()
    {
        //These two values should not be hard coded in your code.
        byte[] key = {251, 9, 67, 117, 237, 158, 138, 150, 255, 97, 103, 128, 183, 65, 76, 161, 7, 79, 244, 225, 146, 180, 51, 123, 118, 167, 45, 10, 184, 181, 202, 190};
        byte[] vector = {214, 11, 221, 108, 210, 71, 14, 15, 151, 57, 241, 174, 177, 142, 115, 137};

        using (var rijndaelHelper = new RijndaelHelper(key, vector))
        {
            var encrypt = rijndaelHelper.Encrypt("StringToEncrypt");
            var decrypt = rijndaelHelper.Decrypt(encrypt);
            Assert.AreEqual("StringToEncrypt", decrypt);
        }
    }
}

public class RijndaelHelper : IDisposable
{
    Rijndael rijndael;
    UTF8Encoding encoding;

    public RijndaelHelper(byte[] key, byte[] vector)
    {
        encoding = new UTF8Encoding();
        rijndael = Rijndael.Create();
        rijndael.Key = key;
        rijndael.IV = vector;
    }

    public byte[] Encrypt(string valueToEncrypt)
    {
        var bytes = encoding.GetBytes(valueToEncrypt);
        using (var encryptor = rijndael.CreateEncryptor())
        using (var stream = new MemoryStream())
        using (var crypto = new CryptoStream(stream, encryptor, CryptoStreamMode.Write))
        {
            crypto.Write(bytes, 0, bytes.Length);
            crypto.FlushFinalBlock();
            stream.Position = 0;
            var encrypted = new byte[stream.Length];
            stream.Read(encrypted, 0, encrypted.Length);
            return encrypted;
        }
    }

    public string Decrypt(byte[] encryptedValue)
    {
        using (var decryptor = rijndael.CreateDecryptor())
        using (var stream = new MemoryStream())
        using (var crypto = new CryptoStream(stream, decryptor, CryptoStreamMode.Write))
        {
            crypto.Write(encryptedValue, 0, encryptedValue.Length);
            crypto.FlushFinalBlock();
            stream.Position = 0;
            var decryptedBytes = new Byte[stream.Length];
            stream.Read(decryptedBytes, 0, decryptedBytes.Length);
            return encoding.GetString(decryptedBytes);
        }
    }

    public void Dispose()
    {
        if (rijndael != null)
        {
            rijndael.Dispose();
        }
    }
}