Current Position & Biography
Orestis Alpos is a blockchain researcher at Common Prefix, whose current team biography identifies his professional base as Bern, Switzerland. He holds a doctorate from the University of Bern, supervised by Christian Cachin, and a computer engineering master’s degree from the National Technical University of Athens. His research combines distributed systems and applied cryptography, including consensus, threshold techniques and protocols with different trust assumptions.
Notable Contributions
Alpos coauthored Practical Large-Scale Proof-of-Stake Asynchronous Total-Order Broadcast with Christian Cachin, Simon Holmgaard Kamp and Jesper Buus Nielsen. The work develops randomness-generation protocols for asynchronous broadcast when the distribution of stake changes over time. It explains how these components can be incorporated into existing broadcast constructions and presents an approach that avoids reliance on fully homomorphic encryption. The contribution is a protocol design under stated assumptions, not a claim that arbitrary network disruption can be ignored in production.
Why Katharos.ai Is Following Them
Katharos.ai follows Alpos because a blockchain’s membership and allocation of influence can change while its participants are still trying to agree on transactions. Designs that assume a fixed committee can conceal complications that emerge when stake moves. Research on dynamic participation helps identify which guarantees survive those changes and what additional machinery is needed.
Areas to Follow
Asynchronous consensus, random beacons, threshold cryptography and flexible trust models. Reporting will distinguish a protocol’s ability to tolerate delayed messages from its practical latency under real network conditions. It will also examine how changes in membership are authenticated and how initialization assumptions affect the meaning of decentralization.
Reporting Scope
Switzerland reflects the Bern operating location explicitly listed in Common Prefix’s current biography, not nationality or the company’s headquarters. University of Bern affiliations in earlier papers describe the research setting at the time of publication and are not used to assert a current university appointment. This profile does not endorse a token, investment or particular network.
Sources for Further Reading
https://www.commonprefix.com/team https://eprint.iacr.org/2023/1103
Photo Credit
Portrait of Orestis Alpos supplied on the Common Prefix team page. Photographer and rights holder are not identified in the original image metadata; public display is not an unrestricted reuse license. Whole photograph downsampled and padded to 16:9 without cropping or facial alteration. Original metadata retained.
Editorial Disclaimer
This profile summarizes information from the cited sources. Katharos.ai does not endorse the subject or guarantee every source claim’s authenticity.