An encryption-based access control framework for content-centric networking This paper proposes a comprehensive encryption-based access control framework for content centricnetworking (CCN), called CCN-AC. This framework is both flexible and extensible, enabling the specification, implementation, and enforcement of a variety of access control policies for sensitive content in the network. The design of CCN-AC heavily relies on the concept of secure content object manifests and leverages them to decouple encrypted content from access policy and specifications for minimum communication overhead and maximum utilization of in-network caches. To demonstrate the flexibility of framework, we also describe how to implement two sample access control schemes, group-based access control and broadcast access control, within CCN-AC framework.