Based on a widely cited terminology, this paper provides different interpretations of concepts introduced in the terminology asking for an implementable privacy model for computer-mediated interactions between individuals. A separation of the digital world and the physical world is proposed, as well as a linkage of the two worlds. The digital world contains digital representations of individuals and it consists of pure data. The physical world contains individuals and it consists of information (produced by individuals) and data. Moreover, a refined definition of privacy is being elaborated that serves as justification for identity management of individuals interested in a sophisticated perspective of privacy.