[9673] in cryptography@c2.net mail archive
Re: limits of watermarking (Re: First Steganographic Image in the Wild)
daemon@ATHENA.MIT.EDU (Michael Shields)
Wed Oct 17 15:06:33 2001
To: Ben Laurie <ben@algroup.co.uk>
Cc: Adam Back <adam@cypherspace.org>,
Greg Broiles <gbroiles@well.com>,
cryptography <cryptography@wasabisystems.com>
From: Michael Shields <shields@msrl.com>
Date: Wed, 17 Oct 2001 17:57:48 +0000
In-Reply-To: <3BCD4DF7.204FD708@algroup.co.uk> (Ben Laurie's message of "Wed, 17 Oct 2001 10:23:03 +0100")
Message-ID: <87zo6qywrn.fsf@challah.msrl.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
In article <3BCD4DF7.204FD708@algroup.co.uk>,
Ben Laurie <ben@algroup.co.uk> wrote:
> b) Even if physical media goes away, individual watermarking blows away
> multicast - and broadband will just never work without that.
It is true that broadband isn't viable if it requires a high-bandwidth
from one source to every end user; the stream has to be exploded at
some replication points near the viewers. But that replication
doesn't have to be done by the routers; it can also happen at a
distributed network of servers, which can be intelligent enough to add
watermarking at a cost on the same order of the cost to provide SSL.
This sort of server-based multicasting is widely deployed today by
Akamai and others, and has been far more successful than router-based
multicasting.
--
Shields.
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