DART: A distributed-oracles framework for privacy-preserving data traceability

Slides presented at European Blockchain Week 2021 by DART team.

Transcript

1. European Blockchain Week 2021 22.09.2021 Alessandro Brighente, M. Conti, G. Kumar, R. Saha
2. DART A. Brighente, M. Conti, G. Kumar, R. Saha
3. | ONTOCHAIN.NGI.EU Introduction and Motivation • Off-chain knowledge management represents a fundamental task for a widely applied blockchain ecosystem • Distributed Oracles Network (DON) provide a solution • However, data shall come with a reliability value • DART provides a modular solution for reliability-aware off-chain knowledge reporting
4. | ONTOCHAIN.NGI.EU DART Architecture
5. | ONTOCHAIN.NGI.EU Architecture Details
6. | ONTOCHAIN.NGI.EU Truth Discovery • Assess the veracity of the collected information • Independent from type of data • Exploit space and time correlation • Multiple truth discovery levels to prevent attacks
7. | ONTOCHAIN.NGI.EU DON under attack • Collusion: multiple reporters agree on a false value • Majority Voting: most reported value is the true one • TD provides higher resistance towards attacks
8. | ONTOCHAIN.NGI.EU Next Steps • Implementation of a testbed to validate our truth discovery framework • Investigate scalability/reliability tradeoff • Privacy guarantees
9. Thank you! alessandro.brighente@unipd.it https://www.math.unipd.it/~abrighen/ Q&As