Information-Centric Networking (ICN) has recently received increasing attention from the research community. Its intriguing properties, including identity/location split, in-network caching and multicast, have turned it into the primary paradigm for many recent inter-networking proposals. Most of these are mainly concerned with core architectural issues of ICN including naming, routing, and scalability, giving little or no attention to privacy. Privacy issues however, are together with security, an integral part of any contemporary communication technology and play a crucial role for its adoption. Since the core functions of an ICN architecture are content name based, many opportunities for privacy related attacks-such as user profiling-are created; being aware of these privacy threats, users might completely dismiss the idea of using an ICN-based network infrastructure. Therefore, it is important to investigate privacy as an integral part of any ICN proposal. To this end, in this paper, we develop a privacy framework for analyzing privacy issues in different ICN architectures. Our framework defines a generic ICN model as well as various design choices that can be used in order to implement the functions of this model. Moreover it considers a comprehensive list of privacy attack categories, as well as various types of adversaries.
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