Departmental Ph.D. defense of Máté Horváth
Cryptographic Problems in the Context of Data Markets
Departmental Ph.D. defense of Máté Horváth
Supervisor: Levente Buttyán
Abstract
The Internet of Things (IoT) provides us with a vast amount of new data day by day; however, currently, most of these are only stored without utilizing their full potential. The attractive concept of data markets can change this situation in the near future. Exchanging data, however, is always accompanied by privacy and security concerns. Being a broad concept, data markets can pose various challenges depending on the exact scope, the demands, goals, and opportunities of the actors, most notably on the trust or distrust between them.
To better understand the challenges, we provide a general system model for data markets and use it to identify and structure the emerging scenarios and connect them to the relevant areas of cryptography. This problem domain analysis serves as the starting point of the rest of the dissertation. Our analysis highlights open problems, motivating further research on specific cryptographic primitives, and we address three of these. We investigate the problems of
- partial input information leakage in the context of private function evaluation (PFE);
- efficient user revocation in multi-authority ciphertext-policy attribute based encryption (CP-ABE);
- frequent updates when using searchable symmetric encryption (SSE) and restricted search is enough in contrast to search over the entire database.
The problems and solutions we propose are not exclusively tied to data market security but can also be applied in secure computation and secure cloud storage.
Dissertation, Theses booklet
- Chair of the defense: Miklós Telek (BME-HIT)
- Reviewers: Melek Önen (EURECOM) and Attila Pethő (University of Debrecen)
- Planned date: 16. November 2020, 10:30am
Planned physical location: IB110 Due to the coronavirus spread, the defense will be virtual.
- Link to join online: https://bit.ly/35lq5Cx