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Re: OneRNG: Open Hardware Random Number Generator

From Marko Rauhamaa <marko@pacujo.net>
Newsgroups comp.misc
Subject Re: OneRNG: Open Hardware Random Number Generator
Date 2014-11-03 22:12 +0200
Organization A noiseless patient Spider
Message-ID <87bnooyrf6.fsf@elektro.pacujo.net> (permalink)
References <CDQMAMXHXef8qCbpaJtDabMN@dont-email.me> <alpine.LNX.2.02.1410291605340.4171@darkstar.example.org> <m2tt1s$hc8$1@dont-email.me> <87y4rx4d1w.fsf@elektro.pacujo.net> <m38nbl$krk$1@dont-email.me>

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scott@alfter.diespammersdie.us (Scott Alfter):

> In article <87y4rx4d1w.fsf@elektro.pacujo.net>,
> Marko Rauhamaa  <marko@pacujo.net> wrote:
>>scott@alfter.diespammersdie.us (Scott Alfter):
>>> If /dev/random isn't backed by hardware, other entropy sources are
>>> considered: time between keystrokes, mouse movement, disk interrupts,
>>> etc.
>>
>>That sounds like hardware to me.
>
> Perhaps a better way of putting it would've been to distinguish a
> purpose-built entropy source (such as a hardware RNG) from a device (such as
> a keyboard) whose normal operating characteristics can be exploited to serve
> as an entropy source.

A coworker today was trying to generate a GPG key. He had to do quite a
bit of exercise with the mouse to produce the needed entropy. It seemed
to me he had to work several seconds for each random byte, and the total
amount of was hundreds of bytes.


Marko

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Thread

OneRNG: Open Hardware Random Number Generator Rich <rich@example.invalid> - 2014-10-28 10:15 +0000
  Re: OneRNG: Open Hardware Random Number Generator Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-10-28 15:17 -0700
    Re: OneRNG: Open Hardware Random Number Generator Tonton Th <tTh@nowhere.invalid> - 2014-10-28 22:34 +0000
      Re: OneRNG: Open Hardware Random Number Generator Michael Black <et472@ncf.ca> - 2014-10-28 19:15 -0400
        Re: OneRNG: Open Hardware Random Number Generator Oregonian Haruspex <bob_davis_retired@yahoo.com> - 2014-10-28 18:43 -0700
      Re: OneRNG: Open Hardware Random Number Generator Christian Neukirchen <chneukirchen@gmail.com> - 2014-10-29 15:41 +0100
        Re: OneRNG: Open Hardware Random Number Generator scott@alfter.diespammersdie.us (Scott Alfter) - 2014-10-29 18:11 +0000
        Re: OneRNG: Open Hardware Random Number Generator Michael Black <et472@ncf.ca> - 2014-10-29 16:06 -0400
          Re: OneRNG: Open Hardware Random Number Generator scott@alfter.diespammersdie.us (Scott Alfter) - 2014-10-30 17:38 +0000
            Re: OneRNG: Open Hardware Random Number Generator Marko Rauhamaa <marko@pacujo.net> - 2014-10-30 20:39 +0200
              Re: OneRNG: Open Hardware Random Number Generator scott@alfter.diespammersdie.us (Scott Alfter) - 2014-11-03 20:08 +0000
                Re: OneRNG: Open Hardware Random Number Generator Marko Rauhamaa <marko@pacujo.net> - 2014-11-03 22:12 +0200
  Re: OneRNG: Open Hardware Random Number Generator Sylvia Else <sylvia@not.at.this.address> - 2014-10-31 16:52 +1100
    Re: OneRNG: Open Hardware Random Number Generator nobody@nowhere.invalid (natp) - 2014-11-01 01:52 +0000

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