  Media sharing is an extremely popular paradigm of social interaction in
online social networks (OSNs) nowadays. The scalable media access control is
essential to perform information sharing among users with various access
privileges. In this paper, we present a multi-dimensional scalable media access
control (MD-SMAC) system based on the proposed scalable ciphertext policy
attribute-based encryption (SCP-ABE) algorithm. In the proposed MD-SMAC system,
fine-grained access control can be performed on the media contents encoded in a
multi-dimensional scalable manner based on data consumers' diverse attributes.
Through security analysis, we show that the proposed MC-SMAC system is able to
resist collusion attacks. Additionally, we conduct experiments to evaluate the
efficiency performance of the proposed system, especially on mobile devices.
