字符串在.NET中的简单模糊处理？ [英] Simple obfuscation of string in .NET?

问题描述

我需要发送的约30个字符的字符串结束，这将可能最终成为了另一家公司的数据库中的ID互联网。

I need to send a string of about 30 chars over the internet which will probably end up as an ID in a another company's database.

虽然本身不​​会被识别字符串，我仍然喜欢它不被识别的任何方式。

While the string itself will not be identifying, I would still like it not to be recognisable in any way.

什么是混淆这样的字符串在.NET中最简单的方法，因此，它可以很容易地逆转时，有必要吗？

What is the easiest way to obfuscate such a string in .NET, so that it can be easily reversed when necessary?

推荐答案

如何经典的东西（具有现代风味的）。

How about something classical (with a modern twist).

public static string Caesar(this string source, Int16 shift)
{
    var maxChar = Convert.ToInt32(char.MaxValue);
    var minChar = Convert.ToInt32(char.MinValue);

    var buffer = source.ToCharArray();

    for (var i = 0; i < buffer.Length; i++)
    {
        var shifted = Convert.ToInt32(buffer[i]) + shift;

        if (shifted > maxChar)
        {
            shifted -= maxChar;
        }
        else if (shifted < minChar)
        {
            shifted += maxChar;
        }

        buffer[i] = Convert.ToChar(shifted);
    }

    return new string(buffer);
}

这显然你会使用这样的

Which obviously you would use like this

var plain = "Wibble";
var caesered = plain.Caesar(42);
var newPlain = caesered.Caesar(-42);

它的快，你的关键仅仅是一个的Int16 ，它将prevent从副本漫不经心的观察者粘贴的价值，但它并不安全。

Its quick, your key is just an Int16 and it will prevent the casual observer from copy pasting the value but, its not secure.

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