Secure deletion myths, issues, and solutions
Proceedings of the second ACM workshop on Storage security and survivability
OSDI '06 Proceedings of the 7th symposium on Operating systems design and implementation
Operating system profiling via latency analysis
OSDI '06 Proceedings of the 7th symposium on Operating systems design and implementation
GreenFS: making enterprise computers greener by protecting them better
Proceedings of the 3rd ACM SIGOPS/EuroSys European Conference on Computer Systems 2008
Secure deletion for NAND flash file system
Proceedings of the 2008 ACM symposium on Applied computing
Managing computer files via artificial intelligence approaches
Artificial Intelligence Review
A survey of confidential data storage and deletion methods
ACM Computing Surveys (CSUR)
TrueErase: per-file secure deletion for the storage data path
Proceedings of the 28th Annual Computer Security Applications Conference
Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
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Files or even their names often contain confidential or secret information. Most users believe that such information is erased as soon as they delete a file. Even those who knowthat this is not true often ignore the issue. Nevertheless, recovering deleted files is trivial and can be performed even by novice hackers. The problem is exacerbated by the widespread of portable and mobile storage devices. This type of unwanted after-deletion data recovery is in part an education problem. Users believe that deleted files are erased, even though they are not. Retraining and educating users is difficult. Therefore, storage systems should behave appropriately - the data should be erased from the storage on a per-delete basis. We found that existing solutions are either inconvenient, inefficient, or insecure. We have designed Purgefs: a file system extension that transparently overwrites files on the per-delete basis. Purgefs can be automatically added to a number of existing and future file systems, including networked and stackable file systems. Purgefs supports multiple policies to trade-off performance with the level of purging guarantees. We demonstrate that Purgefs does not add overheads or perturb users' activity under typical user workloads.