+-------------------+ | Authentication | | Agent | +-------------------+ | libpolkit-agent-1 | +-------------------+ ^ +--------+ | | Client | +--------------+ +--------+ | ^ | | User Session | | =======================|========================|============= System Context | | | | | +---+ V | /------------\ | | System Bus | | \------------/ | ^ ^ V | | +---------------------+ +--------------+ | | Mechanism | | | +---------------------+ V +----> | libpolkit-gobject-1 | +------------------+ +---------------------+ | org.freedesktop. | | PolicyKit1 | +------------------+ | Backends and | | Extensions | +------------------+