A Novel Authorization Scheme for Multimedia Social Networks Under Cloud Storage Method by Using MA-CP-ABE

This article finds that with the development of network technology and the change of a users' social habits, the existing multimedia social network, whether it is one-to-one authorization or one-to-many authorization, are having difficulty meeting the needs of users and cloud storage service. In order to solve this problem, this article proposes a new authorization scheme of multimedia community, based on attribute encryption. Use MA-CP-ABE solution to enhance system service efficiency. This program contributes to two aspects: (1) combining user trust with attribute-based authorizations, and (2) enhancing the flexibility and security of the solution. The scheme has been applied in the prototype system and achieved good results. Results prove that the program has good application value for cloud storage technology, IoT and many other fields.

A Format-Compliant Encryption for Secure HEVC Video Sharing in Multimedia Social Network

Aiming at secure video sharing in multimedia social network, a format-compliant encryption scheme for high efficiency video coding (HEVC) based on sigh data hiding (SDH) is proposed. The encryption is tightly integrated with the encoding/decoding processes. For each coding unit (CU), the sign of the nonzero coefficient and the first hiding nonzero coefficient are both encrypted with key stream. Meanwhile, one of merging index, motion vector prediction index, sign of motion vector difference and reference frame index is chosen for encryption according to a control factor. As it is explored in this article, experimental results and analysis indicate that it can effectively resist brute-force attack, difference attack and replacement attack. Also, it can keep a good balance in encryption space, computation complexity and security. Based on the encryption scheme, a framework of its implementation in multimedia social network is presented. It has great potential to be implemented for secure video sharing in multimedia social network.