Fwd: Re: Timer randomness

[Benjamin]

For those of you who read my prior forward:

-------- Original Message --------
Subject: 	Re: Timer randomness
Date: 	Tue, 11 Oct 2011 14:36:55 +0800
From: 	Sandy Harris <sandyinchina at gmail.com>
To: 	Speculators <dc-stuff at dc-stuff.org>



On Sun, Oct 2, 2011 at 11:24 AM, Sandy Harris<sandyinchina at gmail.com>  wrote:
>  I have written a demon for Linux that gathers entropy from timer
>  jitter and pushes it into random(4). There is working code and a
>  PDF rationale document.
>
>  Comment and criticism solicited.
>
>  It is at: ftp://ftp.cs.sjtu.edu.cn:990/sandy/maxwell/

Do not use any version earlier than today's. I just found and fixed
and simple but nasty bug.

Dumb, much? To combine two 16-bit items into one 32-bit word,
I used:

    x = (a<<16)&  b ;

because of the AND, that always gives zero. Of course it has
to be an OR.