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Plutus: Scalable Secure File Sharing on Untrusted Storage
Plutus is a cryptographic storage system that enables secure file sharing without placing much trust on the file servers. In particular, it makes novel use of cryptographic primitives to protect and share files. Plutus features highly scalable key management while allowing individual users to retain direct control over who gets access to their files. We explain the mechanisms in Plutus to reduce the number of cryptographic keys exchanged between users by using filegroups, distinguish file read and write access, handle user revocation efficiently, and allow an untrusted server to authorize file writes. We have built a prototype of Plutus on OpenAFS. Measurements of this prototype show that Plutus achieves strong security with overhead comparable to systems that encrypt all network traffic.
author = {Mahesh Kallahalla and Erik Riedel and Ram Swaminathan and Qian Wang and Kevin Fu},
title = {Plutus: Scalable Secure File Sharing on Untrusted Storage},
booktitle = {2nd USENIX Conference on File and Storage Technologies (FAST 03)},
year = {2003},
address = {San Francisco, CA},
url = {https://www.usenix.org/conference/fast-03/plutus-scalable-secure-file-sharing-untrusted-storage},
publisher = {USENIX Association},
month = mar
}
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