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SACMAT
2015
ACM

Commune: Shared Ownership in an Agnostic Cloud

7 years 11 months ago
Commune: Shared Ownership in an Agnostic Cloud
Cloud storage platforms promise a convenient way for users to share files and engage in collaborations, yet they require all files to have a single owner who unilaterally makes access control decisions. Existing clouds are, thus, agnostic to shared ownership. This can be a significant limitation in many collaborations because, for example, one owner can delete files and revoke access without consulting the other collaborators. In this paper, we first formally define a notion of shared ownership within a file access control model. We then propose a solution, called Commune, to the problem of distributed enforcement of shared ownership in agnostic clouds, so that access grants require the support of an agreed threshold of owners. Commune can be used in existing clouds without modifications to the platforms. We analyze the security of our solution and evaluate its performance through an implementation integrated with Amazon S3. Categories and Subject Descriptors C.2.0 [Computer-C...
Claudio Soriente, Ghassan O. Karame, Hubert Ritzdo
Added 17 Apr 2016
Updated 17 Apr 2016
Type Journal
Year 2015
Where SACMAT
Authors Claudio Soriente, Ghassan O. Karame, Hubert Ritzdorf, Srdjan Marinovic, Srdjan Capkun
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