6 citations · 12 across the 9 of their papers we have counts for
11 papers
Slow and Steady: Preventing MEV with Verifiable Delays
Zeta Avarikioti, Dimitris Karakostas, Karl Kreder +1
Our work presents a defense mechanism against Maximal Extractable Value (MEV) opportunities in distributed ledgers. The mechanism relies on the idea of enforcing a verifiable delay…
Formalization and security analysis of the Bridgeless protocol
Orestis Alpos, Oleg Fomenko, Dimitris Karakostas +2
This paper formalizes the proves the security of the Bridgeless protocol, a protocol able to bridge tokens between various chains. The Bridgeless protocol is run by a set of valida…
Optimal Reward Allocation via Proportional Splitting
Lukas Aumayr, Zeta Avarikioti, Dimitris Karakostas +2
Following the publication of Bitcoin's arguably most famous attack, selfish mining, various works have introduced mechanisms to enhance blockchain systems' game-theoretic resilienc…
SoK: Measuring Blockchain Decentralization
Christina Ovezik, Dimitris Karakostas, Mary Milad +2
In the context of blockchain systems, the importance of decentralization is undermined by the lack of a widely accepted methodology to measure it. To address this gap, we set out a…
Statistical Confidence in Mining Power Estimates for PoW Blockchains
Mary Milad, Christina Ovezik, Dimitris Karakostas +1
The security of blockchain systems depends on the distribution of mining power across participants. If sufficient mining power is controlled by one entity, they can force their own…
Blockchain Bribing Attacks and the Efficacy of Counterincentives
Dimitris Karakostas, Aggelos Kiayias, Thomas Zacharias
We analyze bribing attacks in Proof-of-Stake distributed ledgers from a game theoretic perspective. In bribing attacks, an adversary offers participants a reward in exchange for in…
SoK: A Stratified Approach to Blockchain Decentralization
Christina Ovezik, Dimitris Karakostas, Aggelos Kiayias
Decentralization has been touted as the principal security advantage which propelled blockchain systems at the forefront of developments in the financial technology space. Its exac…
Optimal Bootstrapping of PoW Blockchains
Ranvir Rana, Dimitris Karakostas, Sreeram Kannan +2
Proof of Work (PoW) blockchains are susceptible to adversarial majority mining attacks in the early stages due to incipient participation and corresponding low net hash power. Boot…
Blockchain Nash Dynamics and the Pursuit of Compliance
Dimitris Karakostas, Aggelos Kiayias, Thomas Zacharias
We study Nash-dynamics in the context of blockchain protocols. We introduce a formal model, within which one can assess whether the Nash dynamics can lead utility-maximizing partic…
Filling the Tax Gap via Programmable Money
Dimitris Karakostas, Aggelos Kiayias
We discuss the problem of facilitating tax auditing assuming "programmable money", i.e., digital monetary instruments that are managed by an underlying distributed ledger. We explo…
Cryptocurrency Egalitarianism: A Quantitative Approach
Dimitris Karakostas, Aggelos Kiayias, Christos Nasikas +1
Since the invention of Bitcoin one decade ago, numerous cryptocurrencies have sprung into existence. Among these, proof-of-work is the most common mechanism for achieving consensus…