Orestis Alpos

Ph.D. student

Orestis Alpos

Cryptology and Data Security Group
Institute of Computer Science
University of Bern
Neubrückstrasse 10
3012 Bern, Switzerland

Office 114
orestis.alpos@unibe.ch

About

I am a fourth-year PhD student at University of Bern. My research interests include distributed systems and blockchains, consensus protocols, applied and threshold cryptography, and multiparty computation.

Prior to joining UniBe, I graduated from the school of Electrical and Computer Engineering at National Technical University of Athens. I did my master thesis on network security with deep learning methods at Netmode Lab.

Publications

Recent work

    Conference Papers

    1. Alpos, O., Cachin, C., Holmgaard Kamp, S., & Buus Nielsen, J. (2023). Practical Large-Scale Proof-Of-Stake Asynchronous Total-Order Broadcast. In J. Bonneau & S. M. Weinberg (Eds.), Proc. 5th Conference on Advances in Financial Technologies (AFT) (Vol. 282, pp. 31:1–31:22). Schloss Dagstuhl - Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.AFT.2023.31
    2. Alpos, O., Amores-Sesar, I., Cachin, C., & Yeo, M. (2024). Eating Sandwiches: Modular and Lightweight Elimination of Transaction Reordering Attacks. In A. Bessani, X. Défago, J. Nakamura, K. Wada, & Y. Yamauchi (Eds.), Proc. 27th International Conference on Principles of Distributed Systems (OPODIS) (Vol. 286, pp. 12:1–12:22). Schloss Dagstuhl – Leibniz-Zentrum für Informatik. https://doi.org/10.4230/LIPIcs.OPODIS.2023.12
    3. Alpos, O., & Cachin, C. (2023). Do Not Trust in Numbers: Practical Distributed Cryptography With General Trust. In S. Dolev & B. Schieber (Eds.), Proc. Stabilization, Safety, and Security of Distributed Systems (SSS) (Vol. 14310, pp. 536–551). Springer. https://doi.org/10.1007/978-3-031-44274-2_40
    4. Alpos, O., Cachin, C., & Zanolini, L. (2021). How to Trust Strangers: Composition of Byzantine Quorum Systems. Proc. 40th Symposium on Reliable Distributed Systems (SRDS), 120–131. https://doi.org/10.1109/SRDS53918.2021.00021
    5. Alpos, O., Cachin, C., Marson, G. A., & Zanolini, L. (2021). On the Synchronization Power of Token Smart Contracts. Proc. 41st International Conference on Distributed Computing Systems (ICDCS), 640–651. https://doi.org/10.1109/ICDCS51616.2021.00067
    6. Alpos, O., & Cachin, C. (2020). Consensus Beyond Thresholds: Generalized Byzantine Quorums Made Live. Proc. 39th Symposium on Reliable Distributed Systems (SRDS), 31–40. https://doi.org/10.1109/SRDS51746.2020.00010

    Talks and presentations

    Teaching