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Date: Sat, 15 Sep 2012 02:58:20 +0100
From: RW <rwmaillists@googlemail.com>
To: Mark Murray <mark@grondar.org>
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Cc: Arthur Mesh <arthurmesh@gmail.com>,
	Ian Lepore <freebsd@damnhippie.dyndns.org>,
	Doug Barton <dougb@freebsd.org>, Ben Laurie <benl@freebsd.org>,
	freebsd-security@freebsd.org, "Bjoern A. Zeeb" <bz@freebsd.org>
Subject: Re: svn commit: r239569 - head/etc/rc.d
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On Fri, 14 Sep 2012 22:49:14 +0100
Mark Murray wrote:

> If not, then whatever you run instead must also be sound. XOR isn't.
> 
> You have a way to go before you convince me on this one. I'll buy this
> argument if it is a routine/regular/risky ocurrence that the output
> of (say)
> 
> $ ( ps -gauxwww ; netstat -arn ; sysctl -ao ) | gzip | ...
> 
> ... can be demonstrated to have insignificant entropy when harvested
> using my proposed method. BTW - you may want to actually see the
> method.

The fastest compression setting on gzip is five times slower than
sha256 and doesn't actually solve any specific problem.

So far no one has come up with a single cogent argument for
compression. If you replace compression with hashing then the need
modifying the kernel code is eliminated.