Secure content sharing for social network using fingerprinting and encryption in the TSH transform domain

In this paper, a JFE (joint fingerprinting and encryption) scheme based on the Tree-Structured Harr (TSH) transform is proposed with the purpose of protecting media distribution in social network environment. The motivation is to map hierarchical community structure of social network into tree structure of TSH transform for fingerprinting and encryption. Firstly, the fingerprint code is produced using social network analysis. Secondly, the content is decomposed by the TSH transform. Thirdly, the content is fingerprinted and encrypted in the TSH transform domain. At last, the encrypted contents are delivered to users via hybrid multicast-unicast. The proposed method, to the best of our knowledge, is the first JFE method in the TSH transform domain using social network analysis. The use of fingerprinting along with encryption can provide a double-layer of protection to media sharing in social network environment. Theory analysis and experimental results show the effectiveness of the proposed JFE scheme.