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Related Experiment Videos

Application-Defined Decentralized Access Control.

Yuanzhong Xu, Alan M Dunn, Owen S Hofmann

    Proceedings of the USENIX ... Annual Technical Conference. USENIX Technical Conference
    |November 27, 2014
    PubMed
    Summary
    This summary is machine-generated.

    Decentralized Access Control (DCAC) is a novel OS-level system enabling users to manage administrative tasks securely. It offers flexible, application-defined principal management with minimal performance overhead.

    Related Experiment Videos

    Area of Science:

    • Computer Science
    • Operating Systems
    • Security

    Background:

    • Traditional access control systems often rely on centralized policy management, limiting flexibility.
    • There is a need for practical OS-level access control that supports application-defined principals and user-managed policies.

    Purpose of the Study:

    • To design and implement DCAC, a practical OS-level access control system.
    • To enable normal users to perform administrative operations within their defined privileges, enhancing application isolation and security.

    Main Methods:

    • Developed DCAC, an OS-level access control system utilizing hierarchically-named attributes for policy definition.
    • Integrated DCAC with file systems (local and networked) and applications to evaluate performance.
    • Demonstrated real-world use cases including application sandboxing and SSH authentication.

    Main Results:

    • DCAC supports application-defined principals and user-defined policies without centralized management.
    • Execution time overhead is minimal: 0%-9% on file system microbenchmarks and under 1% on applications.
    • Successfully implemented DCAC for sandboxing, server security policies, NFS support, and SSH sub-principal authentication.

    Conclusions:

    • DCAC provides a flexible and efficient OS-level access control solution.
    • The system empowers applications and users with decentralized policy management while maintaining security.
    • DCAC demonstrates broad applicability across various security-sensitive computing tasks with minimal integration effort.