Searchable Attribute-Based Encryption Protocol with Hidden Keywords in Cloud

With the continuous development of mobile devices, the emergence of 5G networks, a large number of applications for cloud computing, the computing and storage performance of mobile devices has been greatly improved. The social network applications are platform for communication between users. Although their form is diverse, they focus on connecting different users, enabling users to communicate and interact conveniently to meet social needs. However, the rise of mobile social networks still faces many challenges, including information security, privacy preserving and access control. The predecessors did a lot work at resource consuming traditional cryptographic methods and in case of the mess data, the profile matching process is inefficient. Aiming at solving these problems, a searchable encryption scheme with hidden keywords and fine-grained access control is proposed in this paper. Profile owners can design the flexible access policy on their personal profile. With the hidden keywords, the efficient of profile matching has largely increased. Security analysis shows that the proposed scheme can prevent the leakage of privacy information and the hidden keywords. Detailed performance analysis demonstrates the efficiency and the practicability.