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Re: [UPGRADE] Consider plan B for reduced complexity?

From: Peter Eckersley <pde@eff.org>
Date: Mon, 16 Mar 2015 03:14:09 -0700
To: Mike West <mkwst@google.com>
Cc: Daniel Kahn Gillmor <dkg@fifthhorseman.net>, "public-webappsec@w3.org" <public-webappsec@w3.org>, Eric Mill <eric@konklone.com>
Message-ID: <20150316101409.GS8301@eff.org>
On Mon, Mar 16, 2015 at 10:26:39AM +0100, Mike West wrote:
> On Mon, Mar 16, 2015 at 10:11 AM, Peter Eckersley <pde@eff.org> wrote:
> 
> How? Without an explicit signal (from the server or the client), it's not
> clear to me how you'd choose which users you could safely send to HTTPS for
> a given resource. Could you spell this out in a little more detail?

Sorry for the confusion.  In reply to your point 3, I was just saying
that sites could perform HTTP -> HTTPS rewrites for subsets of their
users or resources, to evaluate the consequences, not that there was a
magical way to know which subsets to target.

So to be clear, I agree that dkg's proposal (which we could call
"upgrade-insecure-by-default") will require some kind of client ->
server compataibility signalling mechanism.  In fact I think I said that
here:

https://lists.w3.org/Archives/Public/public-webappsec/2015Mar/0030.html

Probably that should be a header, "Prefer: https" is okay, "Prefer: tls"
is even shorter :)


> (As an aside: I don't at all think that Daniel's proposal runs counter to
> the UPGRADE spec. I think we can evaluate how to make aspects of that spec
> default behavior in parallel to shipping it as an opt-in.)

Yes, I agree that these efforts are closely aligned.


-- 
Peter Eckersley                            pde@eff.org
Technology Projects Director      Tel  +1 415 436 9333 x131
Electronic Frontier Foundation    Fax  +1 415 436 9993
Received on Monday, 16 March 2015 10:14:44 UTC

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