如何随机是System.Random在.NET 3？ [英] How random is System.Random in .NET 3?

问题描述

我目前正在写一个简单的密码生成器（C＃）。为此，我需要一些随机数。

I am currently writing a simple password generator (C#). For that I need some random numbers.

是否确定要简单地使用随机类随.NET或是否有任何已知的问题是什么？

Is it OK to simply use the Random class that ships with .NET or are there any known problems with that?

推荐答案

没有什么不妥之处 - 它足以产生简单的密码。一个简单的例子（源）：

There is nothing wrong with it -- it's good enough to generate simple passwords. A simple example (source):

Random RandomClass = new Random();
int RandomNumber = RandomClass.Next(); // Random number between 1 and 2147483647
double RandomNumber = RandomClass.Next(1,10); // Random number between 1 and 10

double RandomDouble = RandomClass.NextDouble(); // Random double between 0.0 and 1.0

这篇文章的 如何：生成一个随机密码（C＃/ VB.NET） 的有一个非常COM prehensive产生很好的例子，易于读取指定的复杂密码。这可能是矫枉过正你，但它可能会提供从创意复制一个很好的来源。

The article How To: Generate a Random Password (C#/VB.NET) has a very comprehensive example of generating good, easy-to-read passwords with specified complexity. It may be overkill for you, but it might provide a nice source to copy ideas from.

如果你需要更多的东西的密码，还有另外一个命名空间为：

If you need something more for cryptography, there's another namespace for that:

System.Security.Cryptography

具体而言，可以使用这样的：

Specifically, you can use this:

System.Security.Cryptography.RNGCryptoServiceProvider.GetBytes(yourByte)

一个例子是的 使用加密在VB中的随机数.NET 的，另一种是 加密随机数 的。

An example is Using Crypto for your Random Numbers in VB.NET, and another one is Crypto Random Numbers.

如果你正在考虑滚动您自己，该网站的 <一个href="http://www.guidanceshare.com/wiki/.NET_Framework_2.0_Security_Inspection_Questions_-_Cryptography"相对=nofollow>开发人员指南分享 的有一些信息来说服你出来吧。

If you're thinking about rolling your own, the site Developer Guidance Share has some information to talk you out of it.

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