linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Michal Schmidt <xschmi00@stud.feec.vutbr.cz>
To: linux-os@analogic.com
Cc: Andries Brouwer <aebr@win.tue.nl>,
	Ron Peterson <rpeterso@mtholyoke.edu>,
	linux-kernel@vger.kernel.org
Subject: Re: /dev/random vs. /dev/urandom
Date: Fri, 07 Jan 2005 18:55:14 +0100	[thread overview]
Message-ID: <41DECD02.2000102@stud.feec.vutbr.cz> (raw)
In-Reply-To: <Pine.LNX.4.61.0501071729330.22391@chaos.analogic.com>

linux-os wrote:
> Also, the following shows that the AND operation will destroy
> the randomness of the data. In this case I AND with 1, which
> should produce as many '1's as '0's, ... and clearly does not.
> 

It should not. If it always resulted in exactly the same number of '0's 
and '1's then it wouldn't be random. But the relative rate of '0's and 
'1's will approach 50% if the number of tries is statistically 
significant. 32 tries isn't.

Michal

  reply	other threads:[~2005-01-07 23:33 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-07 19:05 /dev/random vs. /dev/urandom Ron Peterson
2005-01-07 19:16 ` Paulo Marques
2005-01-07 19:24 ` Chris Friesen
2005-01-07 19:26 ` Florian Weimer
2005-01-07 19:27 ` linux-os
2005-01-07 19:40 ` Robert Love
2005-01-07 20:50   ` Ron Peterson
2005-01-07 21:39 ` Andries Brouwer
2005-01-07 22:39   ` linux-os
2005-01-07 17:55     ` Michal Schmidt [this message]
2005-01-07 23:29     ` Andries Brouwer
2005-01-08 17:34     ` Patrick J. LoPresti
2005-01-10 12:41       ` linux-os
2005-01-10 13:03         ` Paulo Marques
2005-01-10 14:39           ` Felipe Alfaro Solana
2005-01-10 15:13         ` Patrick J. LoPresti
2005-01-10 19:24         ` David Schwartz
2005-01-11 14:38         ` Andrea Arcangeli

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=41DECD02.2000102@stud.feec.vutbr.cz \
    --to=xschmi00@stud.feec.vutbr.cz \
    --cc=aebr@win.tue.nl \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-os@analogic.com \
    --cc=rpeterso@mtholyoke.edu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).