A cryptographic file system for UNIX
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
The Coda Distributed File System
Linux Journal
Balancing confidentiality and efficiency in untrusted relational DBMSs
Proceedings of the 10th ACM conference on Computer and communications security
Implementation of a Storage Mechanism for Untrusted DBMSs
SISW '03 Proceedings of the Second IEEE International Security in Storage Workshop
Modeling and assessing inference exposure in encrypted databases
ACM Transactions on Information and System Security (TISSEC)
Exposing the lack of privacy in file hosting services
LEET'11 Proceedings of the 4th USENIX conference on Large-scale exploits and emergent threats
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Small mobile computers are now sufficiently powerful to run many applications, but storage capacity remains limited so working files cannot be cached or stored locally. Even if files can be stored locally, the mobile device is not powerful enough to act as server in collaborations with other users. Conventional distributed file systems cache everything locally or not at all; there is no possibility to cache files on nearby nodes.In this paper we present the design of a secure cache system called CryptoCache that allows roaming users to cache files on untrusted file hosting servers. The system allows flexible sharing of cached files among unauthenticated users, i.e. unlike most distributed file systems CryptoCache does not require a global authentication framework.Files are encrypted when they are transferred over the network and while stored on untrusted servers. The system uses public key cryptography, which allows roaming users to selectively grant read and write access to others by entrusting them with respectively the public key or the private key.