Fine-grained two-factor access control for web-based cloud computing services

Joseph K. Liu, Man Ho Au, Xinyi Huang, Rongxing Lu, Jin Li

    Research output: Contribution to journalArticleResearchpeer-review

    83 Citations (Scopus)


    In this paper, we introduce a new fine-grained two-factor authentication (2FA) access control system for web-based cloud computing services. Specifically, in our proposed 2FA access control system, an attribute-based access control mechanism is implemented with the necessity of both a user secret key and a lightweight security device. As a user cannot access the system if they do not hold both, the mechanism can enhance the security of the system, especially in those scenarios where many users share the same computer for web-based cloud services. In addition, attribute-based control in the system also enables the cloud server to restrict the access to those users with the same set of attributes while preserving user privacy, i.e., the cloud server only knows that the user fulfills the required predicate, but has no idea on the exact identity of the user. Finally, we also carry out a simulation to demonstrate the practicability of our proposed 2FA system.
    Original languageEnglish
    Pages (from-to)484-497
    Number of pages14
    JournalIEEE Transactions on Information Forensics and Security
    Issue number3
    Publication statusPublished - 2016


    • Fine-grained
    • Two-factor
    • Access control
    • Web services

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