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[Jim Hodapp <1224756@xxxxxxxxxxxxxxxxxx>]

I would go one step further with the proposed indicator method of
letting the user know when an app is recording audio. I would have the
indicator-sound icon change to an image of a microphone (or even pop up
a new icon) and set the color as red. This would be much more self-
evident that recording is taking place than just a red speaker (the
first thing that I would think if I saw that without knowing what it
meant was that something was broken with my audio).

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https://bugs.launchpad.net/bugs/1224756

Title:
  Pulseaudio should integrate with trust-store

Status in the base for Ubuntu mobile products:
  Confirmed
Status in pulseaudio package in Ubuntu:
  Triaged

Bug description:
  Currently the 'audio' policy group allows access to pulseaudio which
  allows apps to use the microphone and eavesdrop on the user.
  Pulseaudio needs to be modified to use trust-store, like location-
  service does. Integrating with trust-store means that when an app
  tries use the microphone via pulseaudio, pulseaudio will contact
  trust-store, the trust-store will prompt the user ("Foo wants to use
  the microphone. Is this ok? Yes|No"), optionally cache the result and
  return the result to pulseaudio. In this manner the user is given a
  contextual prompt at the time of access by the app. Using caching this
  decision can be remembered the next time. If caching is used, there
  should be a method to change the decision in settings.

  Targeting to T-Series for now, since the trust-store is not in a
  reusable form yet.

  Original description:
  David and the security team (inspired by an observation from Rick) discussed that when recording, pulseaudio should somehow unobtrusively show the user that it is recording. The easiest thing to do would be for pulseaudio to alert indicator-sound which would then turn its icon red (similar to indicator-message turning blue with new messages). Marking 'high' because apps with access to pulseaudio can currently eavedrop on users. If the app is allowed to do networking (the default for apps), then it can ship that information off to a server somewhere.

  Note 1, the alert to indicator-sound must happen via the out of
  process pulseaudio server and not the confined app itself to be
  effective.

  Note 2, we should consider how to enforce this for foreground apps
  only. Application lifecycle should probably handle this for 13.10
  (apps are suspended if not in foreground or if the screensaver is on),
  but we don't want an app on the converged device to record in the
  background when the user isn't paying attention. Example eavesdropping
  attack: start recording only when the screensaver is on (perhaps
  inhibiting the screensaver during recording would be enough).

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