C ++麦克风输入作为随机种子 [英] C++ Microphone Input As A Random Seed

问题描述

我目前正在使用某种加密技术(在这种情况下为RSA公钥)，为了生成随机密钥，我需要一个随机输入.我认为麦克风将是相对不可复制的数据的良好来源.是否有任何方法可以用麦克风播种方式从麦克风中读取原始数据?有没有更好的方法来获取纯随机种子，如果可以的话，我该怎么办?

I am currently playing around with some cryptography (RSA Public Key, in this case) and in order to generate a random key I need a random input. I figured the microphone would be a good source for relatively unreplicatable data. Is there any way to read the raw data out of a microphone in a way that can be used as to seed srand? Is there a better way to get a purely random seed and if so how would I do it?

我正在带有内置麦克风的笔记本电脑上运行Windows 8，并且正在使用g ++编译器.

I am running Windows 8 on a laptop with a built in mic and I am using the g++ compiler.

推荐答案

不要不要尝试自己从硬件中获取种子.操作系统比您更了解如何获得质量随机性.

Do not try to get seed from hardware yourself. The OS knows a lot more than you about how to get quality randomness.

在Linux上，正确的方法是读取/dev/urandom (不是/dev/random ；它实际上毫无价值)

On Linux, the correct way is to read /dev/urandom (not /dev/random; it is actually worthless)

在Windows上，Google指示您应使用 CryptGenRandom 函数.

On Windows, Google indicates that you should use the CryptGenRandom function.

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