[114293] in cryptography@c2.net mail archive
Re: Dutch Transport Card Broken
daemon@ATHENA.MIT.EDU (James A. Donald)
Wed Jan 30 11:48:31 2008
Date: Wed, 30 Jan 2008 15:18:56 +1000
From: "James A. Donald" <jamesd@echeque.com>
To: Richard Salz <rsalz@us.ibm.com>
CC: Cryptography <cryptography@metzdowd.com>
In-Reply-To: <OFB2B0CB84.7CD69BF0-ON852573E0.0015EDBF-852573E0.001647CF@us.ibm.com>
James A. Donald:
>> SSL is layered on top of TCP, and then one layers
>> one's actual protocol on top of SSL, with the result
>> that a transaction involves a painfully large number
>> of round trips.
Richard Salz wrote:
> Perhaps theoretically painful, but in practice this is
> not the case; commerce on the web is the
> counter-example.
The delay is often humanly perceptible. If humanly
perceptible, too much.
> The benefits of layering for outweigh the perceived
> gains of just merging it all together into one glob.
> For example, the ability to replace layers, or replace
> them by just dropping in a new library.
Compilation would provide the same benefits, and a fair
bit more - such as built in protocol negotiation, rather
than protocol negotiation being reinvented ad hoc in a
different and incompatible way each, and bolted on after
the fact in a different way each time.
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