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RE: AW: Re: [BONDI Architecture & Security] [widgets] new digsig draft

From: Marcin Hanclik <Marcin.Hanclik@access-company.com>
Date: Thu, 26 Mar 2009 23:05:29 +0100
To: Thomas Roessler <tlr@w3.org>, "Hillebrand, Rainer" <Rainer.Hillebrand@t-mobile.net>
CC: "marcosc@opera.com" <marcosc@opera.com>, "paddy@aplix.co.jp" <paddy@aplix.co.jp>, "public-webapps@w3.org" <public-webapps@w3.org>, "otsi-arch-sec@omtplists.org" <otsi-arch-sec@omtplists.org>
Message-ID: <FAA1D89C5BAF1142A74AF116630A9F2C0A26D782B8@OBEEX01.obe.access-company.com>
Hi Thomas,

Nice suggestion, but I am not sure whether it will survive in the real world and be abandoned or replaced by other interpretations.

[I personally associate the author with the widget developer]

Let's imagine I am a developer D of the widget W and I work for company C.
Who is the actual author and what does it mean?
Whose private key is used for author signature?
Could e.g. the company C be the first distributor of the widget W and I remain the author and sign the widget with my private key?

I am not sure whether it is feasible to map all the possible configurations of the relationships with 2-level signature architecture (author + distributors).
Even then, the role names would not fit probably.

Maybe this would be enough?
> The author signature binds the author's identity to the widget package.
Then similarly:
> The distributor's signature binds the distributor's identity to the widget package.

So it would be only about binding various entities with each other.

Thanks.

Kind regards,
Marcin

________________________________________
From: public-webapps-request@w3.org [public-webapps-request@w3.org] On Behalf Of Thomas Roessler [tlr@w3.org]
Sent: Thursday, March 26, 2009 10:38 PM
To: Hillebrand, Rainer
Cc: marcosc@opera.com; paddy@aplix.co.jp; public-webapps@w3.org; otsi-arch-sec@omtplists.org
Subject: Re: AW: Re: [BONDI Architecture & Security] [widgets] new digsig draft

Suggestion:

> The author signature asserts that the signing party is an author of
> the widget, and binds the author's identity to the widget package.

Regards,
--
Thomas Roessler, W3C  <tlr@w3.org>







On 26 Mar 2009, at 17:20, Hillebrand, Rainer wrote:

> Dear Marcos,
>
> We cannot technically guarantee that the author signature really
> comes from the widget's author. It is like having an envelop with an
> unsigned letter. The envelop and the letter can come from different
> sources even if the envelop has a signature.
>
> Best Regards,
>
> Rainer
> ---------------------------------------
> Sent from my mobile device
>
>
> ----- Originalnachricht -----
> Von: Marcos Caceres <marcosc@opera.com>
> An: Paddy Byers <paddy@aplix.co.jp>
> Cc: Hillebrand, Rainer; WebApps WG <public-webapps@w3.org>; otsi-arch-sec@omtplists.org
>  <otsi-arch-sec@omtplists.org>
> Gesendet: Thu Mar 26 17:12:20 2009
> Betreff: Re: [BONDI Architecture & Security] [widgets] new digsig
> draft
>
> On Thu, Mar 26, 2009 at 4:29 PM, Paddy Byers <paddy@aplix.co.jp>
> wrote:
>> Hi,
>>
>>> Agreed. Can we say "were signed with the same certificate" instead?
>>
>> I understood that Webapps had agreed to add a signature profile that
>> designates a particular signature as the author signature - and
>> where this
>> is present it is possible to come up with appropriate precise
>> wording as to
>> whether or not two packages originate from the same author.
>
> Well, that's basically what we have, but Rainer seems to imply that it
> is impossible to do this. I think we get as close as we technically
> can to achieving that goal. However, if that current solution is
> inadequate, then please send us suggestions.
>
> --
> Marcos Caceres
> http://datadriven.com.au
>
>
> T-Mobile International AG
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> Chairman)
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> Handelsregister/Commercial Register Entry: Amtsgericht Bonn, HRB 12276
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>



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Received on Thursday, 26 March 2009 22:07:39 GMT

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