CableLabs CableLabs This document describes an architecture for signaling household privacy preferences to devices in home networks through Privacy Preference Declarations (PPDs). The architecture enables a PPD participant to discover a PPD service endpoint, establish trust in that endpoint through the applicable protocol and security profile, retrieve the applicable household policy instance, and acknowledge receipt of that policy instance. The acknowledgment establishes that a specific policy instance was made available to the participant; it does not, by itself, assert anything about the participant's subsequent behavior.