Towards tamper-evident storage on patterned media
FAST'08 Proceedings of the 6th USENIX Conference on File and Storage Technologies
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Organizations and companies with integrity concerns fortheir archivals are currently left with very few and unconvenientsolutions. To cope with those needs, a TimeStamped Virtual WORM system has been proposed previously,but only its concepts and theory have been examinedyet.Hence, this paper focuses on defining practical blockformats to help implement this system in reality. But thereare several pitfalls on the path of implementation, and thispaper has to be extremely cautious not to introduce anylimit - or security flaw - into virtual WORMs. With suchrequirements, two different block formats are successfullydefined: a streamed format where security data is insertedwithin user's documents, and a detached format where securityinformation is written in a different location.Finally, the detached format is studied in the samplecase of a tamper-evident FTP server.