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Re: Call for adoption - use case for "Trusted application, untrusted intermediary"

From: Eric Rescorla <ekr@rtfm.com>
Date: Tue, 27 Nov 2018 15:28:25 -0800
Message-ID: <CABcZeBPuJu0-2RBp0sCZXGVyXKC9PamhhLy50Zx0NNrQ0LfBKQ@mail.gmail.com>
To: Emad Omara <emadomara@google.com>
Cc: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>, Adam Roach <adam@nostrum.com>, Nils Ohlmeier <nohlmeier@mozilla.com>, public-webrtc@w3.org
On Tue, Nov 27, 2018 at 11:03 AM Emad Omara <emadomara@google.com> wrote:

> Worth mentioning that as I pointed out during my presentation in TPAC
> these APIs could be generic APIs to process/transforms encoded frames, and
> it is up to the application to write their own transformation including
> encryption.
>

Sure, but we're discussing the motivating use cases.

-Ekr

Emad
>
> On Tue, Nov 27, 2018 at 2:28 AM Sergio Garcia Murillo <
> sergio.garcia.murillo@gmail.com> wrote:
>
>> On 26/11/2018 19:59, Adam Roach wrote:
>> > On 11/25/18 4:16 PM, Sergio Garcia Murillo wrote:
>> >> That the IdP script is trusted, so I don't see any reason why it
>> >> can't handle the keys.
>> >
>> >
>> > This doesn't make any sense. There's nothing that prevents the domain
>> > hosting the application JavaScript from pointing to its own IdP (or an
>> > IdP under its control) using setIdentityProvider() -- which has the
>> > exact same security properties of handing the key to itself under your
>> > proposal.
>>
>> No, because the browser will show the domain on the prompt and you will
>> know who you do trust. If not IdP would be completely useless.
>>
>> >
>> > The IdP is trusted to do one very exact and precise thing. Media key
>> > handling is very different than identity assertion.
>> >
>> Why? Idp can say: remote peer is "Sergio Garcia" and this is his public
>> key so you can send media to him (on top of dtls keys that are exchanged
>> normally and not available to the app)
>>
>> Best regards
>>
>> Sergio
>>
>>
>>
>>
Received on Tuesday, 27 November 2018 23:29:26 UTC

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