Privacy-Preserving Cloud Storage (B04)

• Subject Area: Theoretical Computer Science
• Term: from 2016 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 272573906

Cloud storage has gained a central role in digital user habitats. Yet, it incurs privacy threats for data owners and data clients alike. We focus on two questions: how to allow fine-grained access control while hiding the access patterns from the cloud provider, and how to support data clients without revealing data owner identities. We will investigate privacy-preserving outsourced databases with multiple data owners and clients. This encompasses: appropriate privacy notions, cryptographic primitives supporting these, client access through dedicated functions on (encrypted) data, trade-offs between privacy and functionality, and minimal cryptographic assumptions. We will investigate the application of our techniques to the setting of public logs.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1223: Methods and Tools for Understanding and Controlling Privacy
• Applicant Institution: Universität des Saarlandes
• Project Heads: Professor Dr. Michael Backes, since 4/2017; Professor Matteo Maffei, Ph.D., until 3/2017; Professor Dr. Dominique Schröder