[7854] in cryptography@c2.net mail archive
Re: Oh for a decently encrypted mobile phone...
daemon@ATHENA.MIT.EDU (Sampo A Syreeni)
Thu Sep 21 19:42:28 2000
Date: Wed, 20 Sep 2000 09:56:45 +0300 (EEST)
From: Sampo A Syreeni <ssyreeni@cc.helsinki.fi>
Reply-To: Sampo Syreeni <decoy@iki.fi>
To: ji@research.att.com
Cc: cryptography@c2.net
In-Reply-To: <200009181959.PAA07889@bual.research.att.com>
Message-ID: <Pine.SOL.4.20.0009200954370.25182-100000@kruuna.Helsinki.FI>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Mon, 18 Sep 2000 ji@research.att.com wrote:
>> yet connect to normal analog lines. No reasons why the security
>> couldn't be end-to-end.
>
>Lots of reasons. The base unit of those phones has a D-A
>converter, and talks to the analog network. The digital part is only
>for the over-the-air connection.
With Phase 2+ GSM and UMTS we will have tandem free operation - here it
should theoretically be possible to do e2e security. The same goes for
GPRS/HSCSD - no essential reason why we couldn't build the voice service on
top of a data one, if retransmits can be suppressed and we use a newer
codec to fit the bits in the pipe.
Sampo Syreeni <decoy@iki.fi>, aka decoy, student/math/Helsinki university
