W3C home > Mailing lists > Public > ietf-http-wg-old@w3.org > May to August 2000

Re: draft-ietf-tls-http-upgrade reissued

From: Julien Pierre <jpierre@netscape.com>
Date: Thu, 04 May 2000 18:35:14 -0700
Message-ID: <39122552.AE0CAA7B@netscape.com>
To: Scott Lawrence <lawrence@agranat.com>
CC: Rohit Khare <rohit@uci.edu>, IETF HTTP List <http-wg@hplb.hpl.hp.com>

Scott Lawrence wrote:

> > From: Julien Pierre
> > I don't think users will waste their time filling forms
> > if they are not ahead of
> > time certain that it will be transmitted securely.
> If they are that concerned about it, then they should not fill out
> forms that were not delivered securely.  If the form was delivered
> over an unsecured connection, it may have been modified in any
> number of ways to subvert the apparent intent of the form.  Browsers
> don't normally expose the ACTION attribute of a form - an attacker
> may have changed that, or modified field names - the possibilities
> are endless.  Encrypting one exchange in a multiple exchange
> transaction is no security at all.

OK, assume the form was delivered on a secure server. Then it gets
submitted to somebody else - a virtual host on a payment processing
server - to actually process the transaction. This is very common. The
action URL will use regular http .
How does the security upgrade get triggered ?

One more thing to consider :
Let's say you are browsing a site and the connection got upgraded to TLS
. Then you sit idle for a while, and your keep-alive connection times
out. You are on a different part of the site now, filled with normal
http:// links. You click on one. The client has to reconnect. How does
the security get restored ?

> > The duplicate TCP port number issue is IMHO less of a
> > problem because it is rare
> > to exhaust all 2**16 possible TCP ports on a server.
> The concern is with the well-known ports - a much much smaller
> space.
> --
> Scott Lawrence      Director of R & D        <lawrence@agranat.com>
> Agranat Systems   Embedded Web Technology   http://www.agranat.com/

for a good time, try kill -9 -1

Received on Friday, 5 May 2000 02:36:14 UTC

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