An efficient file hierarchy attribute-based encryption scheme in cloud computing

Shulan Wang, Junwei Zhou, Joseph K. Liu, Jianping Yu, Jianyong Chen, Weixin Xie

    Research output: Contribution to journalArticleResearchpeer-review

    163 Citations (Scopus)


    Ciphertext-policy attribute-based encryption (CP-ABE) has been a preferred encryption technology to solve the challenging problem of secure data sharing in cloud computing. The shared data files generally have the characteristic of multilevel hierarchy, particularly in the area of healthcare and the military. However, the hierarchy structure of shared files has not been explored in CP-ABE. In this paper, an efficient file hierarchy attribute-based encryption scheme is proposed in cloud computing. The layered access structures are integrated into a single access structure, and then, the hierarchical files are encrypted with the integrated access structure. The ciphertext components related to attributes could be shared by the files. Therefore, both ciphertext storage and time cost of encryption are saved. Moreover, the proposed scheme is proved to be secure under the standard assumption. Experimental simulation shows that the proposed scheme is highly efficient in terms of encryption and decryption. With the number of the files increasing, the advantages of our scheme become more and more conspicuous.

    Original languageEnglish
    Pages (from-to)1265-1277
    Number of pages13
    JournalIEEE Transactions on Information Forensics and Security
    Issue number6
    Publication statusPublished - 1 Jun 2016


    • Attribute-based encryption
    • Ciphertext-policy
    • Cloud computing
    • Data sharing
    • File hierarchy

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