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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Third-Party Private DFA Evaluation on Encrypted Files in the Cloud
verfasst von : Lei Wei, Michael K. Reiter
Erschienen in: Computer Security – ESORICS 2012
Verlag: Springer Berlin Heidelberg
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Motivated by the need to outsource file storage to untrusted clouds while still permitting limited use of that data by third parties, we present practical protocols by which a client (the third-party) can evaluate a deterministic finite automaton (DFA) on an encrypted file stored at a server (the cloud), once authorized to do so by the file owner. Our protocols provably protect the privacy of the DFA and the file contents from a malicious server and the privacy of the file contents (except for the result of the evaluation) from an honest-but-curious client (and, heuristically, from a malicious client). We further present simple techniques to detect client or server misbehavior.