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dc.contributor.authorPeters, Timothy M.
dc.contributor.authorGondree, Mark A.
dc.contributor.authorPeterson, Zachary N. J.
dc.dateFebruary 8-11, 2015
dc.date.accessioned2015-08-28T18:25:44Z
dc.date.available2015-08-28T18:25:44Z
dc.date.issued2015-02
dc.identifier.citationNDSS ’15, 8-11 February 2015, San Diego, CA, USAen_US
dc.identifier.urihttp://hdl.handle.net/10945/46375
dc.descriptionThe article of record as published may be located at http://dx.doi.org/ 10.14722/ndss.2015.23078en_US
dc.description.abstractWhile solutions for file system encryption can prevent an adversary from determining the contents of files, in situations where a user wishes to hide the existence of data, encryption alone is not sufficient. Indeed, encryption may draw attention to those files, as they may likely contain information the user wishes to keep secret. Consequently, adversarial coercion may motivate the owner to surrender their encryption keys, under duress. This paper presents DEFY, a deniable file system following a log-structured design. Maintaining a log-structure is motivated by the technical constraints imposed by solid-state drives, such as those found in mobile devices. These devices have consequential properties that previous work largely ignores. Further, DEFY provides features not offered by prior work, including: authenticated encryption, fast secure deletion, and support for multiple layers of deniability. We consider security against a snapshot adversary, the strongest deniable filesystem adversary considered by prior literature. We have implemented a prototype based on YAFFS and an evaluation shows DEFY exhibits performance degradation comparable to the encrypted file system for flash, WhisperYAFFS.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleDEFY: A Deniable, Encrypted File System for Log-Structured Storageen_US
dc.typeArticleen_US
dc.contributor.departmentComputer Scienceen_US


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