1994-02-15 - Clipper and Traffic Analysis

Header Data

From: hughes@ah.com (Eric Hughes)
To: cypherpunks@toad.com
Message Hash: e7a9dd7ae965a0c8478b75422e47f5e4347e472dc8a56a520873b4d506629d97
Message ID: <9402151458.AA22074@ah.com>
Reply To: <199402151428.JAA29394@eff.org>
UTC Datetime: 1994-02-15 15:11:42 UTC
Raw Date: Tue, 15 Feb 94 07:11:42 PST

Raw message

From: hughes@ah.com (Eric Hughes)
Date: Tue, 15 Feb 94 07:11:42 PST
To: cypherpunks@toad.com
Subject: Clipper and Traffic Analysis
In-Reply-To: <199402151428.JAA29394@eff.org>
Message-ID: <9402151458.AA22074@ah.com>
MIME-Version: 1.0
Content-Type: text/plain


>Does anyone here have any thoughts as to whether Clipper enables traffic
>analysis or tracing more easy than it normally is under Switching System
>7? 

SS7 uses out-of-band signalling.  The clipper LEAF is an in-band
signal.  Therefore a tap for clipper yields two kinds of information,
content and identities.

Tapping an SS7 signalling network is more expensive and more difficult
to justify.  More expensive because it runs packet-switched, more
difficult because it's not the conversation of any particular party
except the phone company.

Eric

Thread

• Return to February 1994

• Return to “hughes@ah.com (Eric Hughes)”
• Return to “Mike Godwin <mnemonic@eff.org>”
• Return to “paul@poboy.b17c.ingr.com (Paul Robichaux)”

• Return to ““Perry E. Metzger” <pmetzger@lehman.com>”

• 1994-02-15 (Tue, 15 Feb 94 06:31:42 PST) - Clipper and Traffic Analysis - Mike Godwin <mnemonic@eff.org>
  • 1994-02-15 (Tue, 15 Feb 94 07:11:42 PST) - Clipper and Traffic Analysis - hughes@ah.com (Eric Hughes)
    • 1994-02-15 (Tue, 15 Feb 94 08:11:41 PST) - Re: Clipper and Traffic Analysis - Mike Godwin <mnemonic@eff.org>
  • 1994-02-15 (Tue, 15 Feb 94 08:21:42 PST) - Re: Clipper and Traffic Analysis - “Perry E. Metzger” <pmetzger@lehman.com>
  • 1994-02-15 (Tue, 15 Feb 94 08:23:36 PST) - Re: Clipper and Traffic Analysis - paul@poboy.b17c.ingr.com (Paul Robichaux)