Key recovery functional model

This document describes a model for key recovery. The means by which plaint ext may be recovered or reconstructed from recovered key(s) is not addresse d in the key recovery model. Thtr key recovery model is a generalized model that encompasses a wide variety of key recovery systems, including both ke y backup and encapsulated key recovery information techniques. The key reco very model is a functional model. That is, the components of the model are functional components nor system components.