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Proceedings Paper

UsiFe: a user space file system with support for intra-file encryption
Author(s): Rohan Sharma; Prathmesh Kallurkar; Saurabh Kumar; Smruti R. Sarangi
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Paper Abstract

This paper proposes a new paradigm for the design of cryptographic filesystems. Traditionally, cryptographic file systems have mainly focused on encrypting entire files or directories. In this paper, we envisage encryption at a finer granularity, i.e. encrypting parts of files. Such an approach is useful for protecting parts of large files that typically feature in novel applications focused on handling a large amount of scientific data, GIS, and XML data. We extend prior work by implementing a user level file system on Linux, UsiFe, which supports fine grained encryption by extending the popular ext2 file system. We further explore two paradigms in which the user is agnostic to encryption in the underlying filesystem, and the user is aware that a file contains encrypted content. Popular file formats like XML, PDF, and PostScript can leverage both of these models to form the basis of interactive applications that use fine grained access control to selectively hide data. Lastly, we measure the performance of UsiFe, and observe that we can support file access for partially encrypted files with less than 15% overhead.

Paper Details

Date Published: 13 January 2012
PDF: 5 pages
Proc. SPIE 8349, Fourth International Conference on Machine Vision (ICMV 2011): Machine Vision, Image Processing, and Pattern Analysis, 83491G (13 January 2012); doi: 10.1117/12.920380
Show Author Affiliations
Rohan Sharma, Indian Institute of Technology Delhi (India)
Prathmesh Kallurkar, Indian Institute of Technology Delhi (India)
Saurabh Kumar, Indian Institute of Technology Delhi (India)
Smruti R. Sarangi, Indian Institute of Technology Delhi (India)


Published in SPIE Proceedings Vol. 8349:
Fourth International Conference on Machine Vision (ICMV 2011): Machine Vision, Image Processing, and Pattern Analysis
Zhu Zeng; Yuting Li, Editor(s)

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