[43015] in Cypherpunks
Re: forging headers
daemon@ATHENA.MIT.EDU (Bill Sommerfeld)
Mon Nov 6 23:29:08 1995
To: tien@well.sf.ca.us (Lee Tien), perry@piermont.com
Cc: cypherpunks@toad.com
In-Reply-To: Your message of "Mon, 06 Nov 1995 21:55:12 -0500 ."
<199511070255.VAA14851@jekyll.piermont.com>
Date: Mon, 06 Nov 1995 22:53:05 -0500
From: Bill Sommerfeld <sommerfeld@orchard.medford.ma.us>
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> You didn't send ALL the headers, only some of them. You need to send
> on the full set to make a trace possible.
More specifically, the headers which are most needed are the Received:
and Message-Id: headers; each mailer along the path adds another
Received; header, typically with its name, a timestamp, and sometimes
the name or address of the previous system.
Other headers may also help.
> Lee Tien writes:
> > So I got this message. How would someone identify the sender of this
> > message? I'm writing an article on anonymity, with some discussion of
> > remailers, and want to argue that forging already permits people to raise
> > the costs of tracing significantly, anonymous remailers or no.
- Bill
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