SCD2: Secure Content Delivery and Deduplication With Multiple Content Providers in Information Centric Networking

As one of the promising next generation network architectures, information centric networking (ICN) is highly anticipated to improve the bandwidth usage of the Internet and reduce duplicate traffic. Since contents in ICN are disseminated in the whole network, ICN is much more vulnerable and the issue of how to deliver contents securely has been intensively discussed. However, the scalability of the existing schemes is limited. A scalable scheme is expected to be able to achieve fine-grained access control and at the same time also support multiple content providers scenario with efficient key management at user side. Besides, different content providers may publish some identical contents and these contents may be cached in the same intermediate routers, which causes high data redundancy and in turn exerts an adverse impact on the performance of ICN. In this paper, we propose a Secure Content Delivery and Deduplication scheme, called SCD2, to achieve secure and efficient fine-grained access control in ICN with multiple content providers. We first propose a scalable key-policy attribute-based encryption (SKP-ABE) to provide fine-grained access control and allow different attribute authorities to share some public attributes to simplify the key management. Furthermore, based on SKP-ABE, we design a simple but effective mechanism to conduct content deduplication. Finally, we implement a prototype of SCD2 to test its performance and compare it with some existing schemes. The results show that SCD2 has lower storage overhead, a higher degree of deduplication, and better retrieval efficiency.