[129308] in cryptography@c2.net mail archive
Re: On the "randomness" of DNS
daemon@ATHENA.MIT.EDU (=?UTF-8?Q?Ivan_Krsti=C4=87?=)
Wed Jul 30 17:47:03 2008
Cc: Cryptography <cryptography@metzdowd.com>
From: =?UTF-8?Q?Ivan_Krsti=C4=87?= <krstic@solarsail.hcs.harvard.edu>
To: Ben Laurie <ben@links.org>
In-Reply-To: <4890AB33.3020407@links.org>
Date: Wed, 30 Jul 2008 14:55:33 -0400
On Jul 30, 2008, at 1:56 PM, Ben Laurie wrote:
> Oh, and I should say that number of ports and standard deviation are =20=
> not a GREAT way to test for "randomness". For example, the sequence =20=
> 1000, 2000, ..., 27000 has 27 ports and a standard deviation of over =20=
> 7500, which looks pretty GREAT to me. But not very "random".
I boggled a bit at the abuse of simple descriptive statistics, too. =20
For those interested in actual statistical tests of randomness, =20
there's a good literature survey at =
<http://www.ciphersbyritter.com/RES/RANDTEST.HTM=20
>.
--
Ivan Krsti=C4=87 <krstic@solarsail.hcs.harvard.edu> | http://radian.org
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