  The benefits of the ubiquitous caching in ICN are profound, such features
make ICN promising for content distribution, but it also introduces a challenge
to content protection against the unauthorized access. The protection of a
content against unauthorized access requires consumer authentication and
involves the conventional end-to-end encryption. However, in
information-centric networking (ICN), such end-to-end encryption makes the
content caching ineffective since encrypted contents stored in a cache are
useless for any consumers except those who know the encryption key. For
effective caching of encrypted contents in ICN, we propose a secure
distribution of protected content (SDPC) scheme, which ensures that only
authenticated consumers can access the content. SDPC is lightweight and allows
consumers to verify the originality of the published content by using a
symmetric key encryption. Moreover, SDPC naming scheme provides protection
against privacy leakage. The security of SDPC was proved with the BAN logic and
Scyther tool verification, and simulation results show that SDPC can reduce the
content download delay.
