Plutus: Scalable Secure File Sharing on Untrusted Storage

摘要: Plutus is a cryptographic storage system that enables secure file sharing without placing much trust on the servers. In particular, it makes novel use of primitives to protect and share files. features highly scalable key management while allowing individual users retain direct control over who gets access their We explain mechanisms in reduce number keys exchanged between by using filegroups, distinguish read write access, handle user revocation efficiently, allow an untrusted server authorize writes. have built prototype OpenAFS. Measurements this show achieves strong security with overhead comparable systems encrypt all network traffic.