Re: getDisplayMedia() and system audio

On Thu, Sep 6, 2018 at 10:11 AM Bernard Aboba
<Bernard.Aboba@microsoft.com> wrote:
>
> On Sep 5, 2018, at 4:59 PM, Martin Thomson <martin.thomson@gmail.com> wrote:
> >
> > 3. note that the browser chooses how much audio comes with any given
> > share (for instance, platform limitations might make it impossible to
> > capture audio from the entire system, or it might be impossible to
> > separate audio from a single app).
>
> [BA] Some security requirements are probably needed here. If the user selects a single window this should not enable an application to capture audio for the entire system. You *know* that there are applications that would abuse that loophole if it were available (e.g. to find users downloading unauthorized music).

There is probably some role for consent there, but I agree that this
should be as narrow as the selection.  To vary from that would require
some exceptional consent, in an area that is already a minefield.