Lattice-based Protocols for Privacy

Staff - Faculty of Informatics

Date: 12 March 2020 / 15:30 - 17:00

USI Lugano Campus, room A-32, Red building (Via G. Buffi 13)

You are cordially invited to attend the PhD Dissertation Defense of Cecilia Boschini on Thursday March 12th, 2020 at 15:30 in room A-32 (Red building).

Privacy and control over data have become a public concern in the last years. Simultaneously, the advent of the quantum computer has stimulated companies and governments to look for quantum safe alternatives to the protocols we use today. The goal of the research presented in this dissertation proposal is to address both these concerns by building privacy-preserving schemes whose security is based on the hardness of solving some problems over ideal lattices, and whose tokens and key sizes are an improvement over the state of the art. Our first results were published in two papers. The first (ISC 2018) contains a toolbox of primitives (signatures, commitment and NIZK proofs) that are composable and allow building privacy-preserving protocols, such as Anonymous Attribute Tokens. In the second paper (ACNS 2018), we modify these building blocks and combine them with a verifiable encryption scheme to construct a group signature whose keys and signatures require less that 2MB of storage.

Dissertation Committee:

- Prof. Stefan Wolf, Università della Svizzera italiana, Switzerland (Research Advisor)
- Dr. Jan Camenisch, IBM Research Zurich, Switzerland (Research co-Advisor)
- Prof. Marc Langheinrich, Università della Svizzera italiana, Switzerland (Internal Member)
- Prof. Evanthia Papadopoulou, Università della Svizzera italiana, Switzerland (Internal Member)
- Prof. Stephan Krenn, AIT Austrian Institute of Technology GmbH, Austria (External Member)
- Prof. Krzysztof Pietrzak, Institute of Science and Technology, Austria (External Member)