The design and implementation of a log-structured file system
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
StegFS: A Steganographic File System for Linux
IH '99 Proceedings of the Third International Workshop on Information Hiding
Proceedings of the 9th workshop on Multimedia & security
Chipping away at censorship firewalls with user-generated content
USENIX Security'10 Proceedings of the 19th USENIX conference on Security
Scrambling for lightweight censorship resistance
SP'11 Proceedings of the 19th international conference on Security Protocols
Message in a bottle: sailing past censorship
Proceedings of the 29th Annual Computer Security Applications Conference
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We present the idea of a web based covert file system, CovertFS. This file system allows a user to store files covertly on media sharing websites while guaranteeing confidentiality and plausible deniability regarding the existence of the files. Further, it allows for selective and covert sharing of these files with other users. CovertFS can be built on top of any web based media sharing service. The files are hidden within the media using steganographic techniques. The user can plausibly deny the existence of the covert file system since the existence of it cannot be proven. The media sharing service provider is oblivious to the existence of the file system within the stored media, providing them plausible deniability as well. Since the user files are completely hidden, it gives only the user complete control over his confidential files.