The object of this Recommendation is to specify functional entities of an architecture for an exchangeable@ embedded common interface@ in order to download any necessary CA/DRM system to CPE. The download process is operated under a trusted environment and enables the consumption of protected content delivered via broadcast and/or broadband connections with various types of terminal equipment in line with the acquired content rights of the end user. This Recommendation is one in a series of Recommendations@ specifying the whole embedded common interface (ECI) eco-system.