[45327] in Cypherpunks
Re: Timing Cryptanalysis Attack
daemon@ATHENA.MIT.EDU (Perry E. Metzger)
Wed Dec 13 10:15:30 1995
To: Simon Spero <ses@tipper.oit.unc.edu>
Cc: cypherpunks@toad.com
In-Reply-To: Your message of "Tue, 12 Dec 1995 23:17:30 EST."
<Pine.SUN.3.91.951212231006.5039C-100000@tipper.oit.unc.edu>
Reply-To: perry@piermont.com
Date: Wed, 13 Dec 1995 10:00:35 -0500
From: "Perry E. Metzger" <perry@piermont.com>
Simon Spero writes:
> Perry - I don't think NTP goes down to the sort of resolution that
> appeared to be where the signal is here, and for quantisation reasons, I
> don't think it can work over a public routed internetwork.
The question isn't whether you can really get the timing down as far
as you want, but whether you can use statistics to cut down your
search space sufficiently to make things interesting. I can't say, but
I'm no longer prepared to trust the stuff, being fairly conservative
in what I trust.
Perry
