期刊名称：Journal of King Saud University @?C Computer and Information Sciences
印刷版ISSN：1319-1578
出版年度：2022
卷号：34
期号：4
页码：1312-1325
语种：English
出版社：Elsevier
摘要：Internet of Things(IoT) based systems and applications are nowadays being enabled by paradigm of edge or fog computing. Central authority controlling the system formulates the policy about which fog device will get data from which IoT device/s. As fog devices have attributes like physical location, storage capacity, computing capability etc, attribute based access policy can be enforced on each IoT data. Ciphertext Policy – Attribute Based Encryption (CP-ABE) is a method to implement the access policies. However, number of access trees becomes equal to the number of access policies. In this paper, hierarchy present in attribute sets of access policies has been exploited to obtain single integrated access policy. A content sharing protocol named Hierarchical Efficient Encryption at Edge (HE3) is worked out to implement the concept. The proposed protocol is demonstrated to be highly efficient in terms of encryption and decryption time as compared to existing approaches. A formal security proof is provided to establish strength of encryption.
