static void Main(string[] args)
{
    Encoding byteEncoder = Encoding.Default;

    String key = "ShHhd8a08JhJiho98ayslcjh";
    String message = "Let us meet at 9 o'clock at the secret place.";

    String encryption = Encrypt(message,key,false);
    String decryption = Decrypt(encryption,false);

    Console.WriteLine("Message: {0}",message);
    Console.WriteLine("Encryption: {0}",encryption);
    Console.WriteLine("Decryption: {0}",decryption);
}

public static string Encrypt(string toEncrypt,string key,bool useHashing)
{
    byte[] keyArray;
    byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);

    if (useHashing)
    {
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
    }
    else
        keyArray = UTF8Encoding.UTF8.GetBytes(key);

    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    tdes.Key = keyArray;
    tdes.Mode = CipherMode.ECB;
    tdes.Padding = PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateEncryptor();
    byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray,toEncryptArray.Length);

    return Convert.ToBase64String(resultArray,resultArray.Length);
}

public static string Decrypt(string toDecrypt,bool useHashing)
{
    byte[] keyArray;
    byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);

    if (useHashing)
    {
        MD5CryptoServiceProvider hashmd5 = new MD5CryptoServiceProvider();
        keyArray = hashmd5.ComputeHash(UTF8Encoding.UTF8.GetBytes(key));
    }
    else
        keyArray = UTF8Encoding.UTF8.GetBytes(key);

    TripleDESCryptoServiceProvider tdes = new TripleDESCryptoServiceProvider();
    tdes.Key = keyArray;
    tdes.Mode = CipherMode.ECB;
    tdes.Padding = PaddingMode.PKCS7;

    ICryptoTransform cTransform = tdes.CreateDecryptor();
    byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray,toEncryptArray.Length);

    return UTF8Encoding.UTF8.GetString(resultArray);
}

当我用PHP加密时,我得到：arTdPqWOg6VppOqUD6mGITjb24 x5vJjfAufNQ4DN7rVEtpDmhFnMVM W / WFlksR

<?PHP
        $key = "ShHhd8a08JhJiho98ayslcjh";
        $input = "Let us meet at 9 o'clock at the secret place.";

        $td = mcrypt_module_open('tripledes','','ecb','');
        $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td),MCRYPT_RAND);
        mcrypt_generic_init($td,$key,$iv);
        $encrypted_data = mcrypt_generic($td,$input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        echo base64_encode($encrypted_data);
    ?>

我对密码学知之甚少,无法弄清楚原因.有任何想法吗？谢谢.