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RE: [widgets] Comment on Widgets 1.0: Digital Signatures - the Usage property

From: Hillebrand, Rainer <Rainer.Hillebrand@t-mobile.net>
Date: Wed, 11 Feb 2009 09:03:26 +0100
Message-ID: <41C7C0F2BC2713438D933052463E9259024A87D8@DEMSWBMXSC0104.sv.ad.tmo>
To: "Marcos Caceres" <marcosscaceres@gmail.com>
Cc: <public-webapps@w3.org>

Hi Marcos,

I am not aware of any feedback on your e-mail. Here is mine.

Best Regards,

Rainer
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-----Original Message----- 
From: public-webapps-request@w3.org [mailto:public-webapps-request@w3.org] On Behalf Of Marcos Caceres
Sent: Dienstag, 27. Januar 2009 11:56
To: Priestley, Mark, VF-Group; public-webapps@w3.org
Subject: Re: [widgets] Comment on Widgets 1.0: Digital Signatures - the Usage property



Hi Mark,
Some minor comments below. Bar a few clarifications, I mostly agree with your proposal. 

On 1/26/09 1:35 PM, "Priestley, Mark, VF-Group"
<Mark.Priestley@vodafone.com> wrote:

> 
> A possible solution to this problem would be to require an updates to 
> be signed using the same private key that was used to sign the 
> previous version of the widget archive. Essentially this update 
> signature would securely link an update to an installed widget 
> resource by nature of the fact that they had both been signed by 
> someone with access to the same private key.

I'm ok with this so long as it an auxiliary feature and that updates can be performed over plain-old HTTP without requiring a certificate. If an implementer chooses to deviate from this model by disallowing updates that lack a digital signature, that is their prerogative. Irrespective, I am of the position that we must architecture the update model to work without signatures and then progressibly enhance the update model firstly through HTTPS and then through signatures.
 
RH: An update may not need to be signed. This depends on the original widget resource that shall be updated. An update for a widget resource should only be processed if it has the same or a higher security level than the original widget resource. For example, a signed widget resource that was installed from a memory card shall not be updated with an unsigned update package that was retrieved from a web server without SSL/TLS. On the other hand, a signed update package should update a widget resource that was retrieved from a web server without SSL/TLS.
Received on Wednesday, 11 February 2009 08:04:07 GMT

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