Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2018, Vol. 54 ›› Issue (1): 14-24.DOI: 10.13209/j.0479-8023.2017.088

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An Efficient Safe Directory Based File Protection Mechanism

SHEN Manting, YU Yinyan, TANG Zhi, CUI Xiaoyu   

  1. Institute of Computer Science & Technology, Peking University, Beijing 100080
  • Received:2016-11-03 Revised:2016-12-13 Online:2018-01-20 Published:2018-01-20
  • Contact: YU Yinyan, E-mail: yuyinyan(at)


沈熳婷, 俞银燕, 汤帜, 崔晓瑜   

  1. 北京大学计算机科学技术研究所, 北京 100080
  • 通讯作者: 俞银燕, E-mail: yuyinyan(at)
  • 基金资助:
    863 计划(2012AA013102)资助


Existing file protection approaches and the applications are suitable for the users who own one single device but not the users with multiple devices. A novel mechanism is proposed that provides an efficient and fast cryptographic-based protection approach for files in an appointed directory called safe directory. The highlights are its ability to protect sensitive files automatically in a short time and the support for secure file sharing across devices. All operations in the safe directory are monitored in real time and the files in the directory are protected automatically. Experimental results show that proposed mechanism performs well in performance.

Key words: safe directory, file protection mechanism, multiple devices, encryption, access control


针对现有的文件保护方法侧重于保护单个设备上文件信息的特点, 面向跨设备使用和保护文件信息的需求, 提出一种高效的基于安全目录的文件保护机制。该机制可动态地检测安全目录中的用户行为, 实时保护文件信息, 支持文件多设备安全共享。实验结果表明, 基于安全目录的文件保护机制具有良好的可用性、响应速率和存储性能。

关键词: 安全目录, 文件保护机制, 多设备, 加密, 访问控制

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