Abstract
With the development of cloud computing, more and more video services are moving to the cloud. How to realize fine-grained access control of those data on cloud becomes an urgent problem. Attribute-based encryption provides a solution. However, heavy computation is still a bottleneck restricting the wider application of attribute-based encryption in cloud computing. In addition, we find that expression of the access control structure on media cloud can be further improved. To solve these problems, we propose an enhanced media ciphertext-policy attribute-based encryption algorithm and introduce its two key components, the multiple access tree and the key chain. To increase the scalability of the proposed algorithm, we discussed the issues of multi-authorization, user revocation, and 1 − n multiple access tree. Security analysis shows that enhanced media ciphertext-policy attribute-based encryption can successfully resist chosen-plaintext attacks under the decisional bilinear Diffie–Hellman assumption. Performance analysis proves both theoretically and practically that the proposed algorithm incurs less computational cost than the traditional ciphertext-policy attribute-based encryption, multi-message ciphertext-policy attribute-based encryption, and scalable ciphertext-policy attribute-based encryption by optimizing the access control structure. Our proposed algorithm has strong practical significance in media cloud.
Highlights
Media cloud provides video storage, processing, and distribution services to users
Ciphertext-policy attributebased encryption (CP-ABE) is an important technology to tackle this challenge in application scenarios such as personal health records (PHR)[2,3] and smart girds.[4,5]
We prove that the security of eM-CP-ABE in the selective-set model reduces to the hardness of the decisional bilinear Diffie–Hellman (DBDH) assumption
Summary
Media cloud provides video storage, processing, and distribution services to users. How to realize fine-grained access control of massive amounts of videos is a huge challenge for the media cloud.[1]. The corresponding access control policies (Table 1) have the following inclusion relation: r1 & r2 & r3. These policies share some common attributes, such as video id (vid) and category. Ma et al.[8] optimized the access tree in their CP-ABE algorithm called scalable ciphertextpolicy attribute-based encryption (SCP-ABE), and expanded the access control rules from one dimension to three dimensions, thereby reducing the time required for encryption and decryption. Note that different segments correspond to different keys These symmetric keys are encrypted by eM-CP-ABE to achieve fine-grained access control. Using one 1 À n MAT, eM-CP-ABE can encrypt several videos with different privilege levels It significantly reduces the cost of generating and maintaining access structures.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Distributed Sensor Networks
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
