Dionysis Zindros
Co-Founder & Researcher at Common Prefix Blockchains and Financial CryptographyI'm a co-founder and researcher at Common Prefix. I live in magnificent Athens in Greece. I'm from Ioannina, Greece.
I enjoy learning, teaching, general aviation, sailboats, and jazz piano.
Philosophy. Let's use cryptography and political code to build systems beneficial to all and owned by no one. Genuine relationships, valuable ideas, and skills can grow in a digital anarchy where people are valued more than transactional exchanges. I dislike authority and discrimination. I believe in a decentralized internet, where everyday people are empowered to communicate with privacy, freedom of speech, and freedom of information, while demanding transparency from large organizations. I support Signal, Tor, and pirate-friendly copyright reform. I publish papers under Creative Commons and code under GPL or MIT.
Research interests. My research interests are blockchains, consensus protocols, proof-of-work, proof-of-stake, superlight clients, cross-chain interoperability, and blockchain ethics. I'm working on a blockchain course.
Vitae. I did my post-doc with David Tse at the Department of Electrical Engineering at Stanford University. I hold a PhD in cryptography from the Department of Computer Science at the University of Athens where I was advised by Aggelos Kiayias. I hold a MEng in Electrical and Computer Engineering from the National Technical University of Athens. In the past, I worked at Google's Incident Response Security team in Zürich, Twitter's Product Security team in San Francisco where I conducted research on encryption/compression composition, IOHK where we built the Cardano proof-of-stake cryptocurrency, OpenBazaar, and as a software engineer at deviantART.
📜 Publications & Manuscripts
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Light Clients for Lazy Blockchains
with Ertem Nusret Tas, Lei Yang, David Tse -
Hours of Horus: Keyless Cryptocurrency Wallets
published at Financial Crypto 2022 Workshop on Trusted Smart Contracts -
The Velvet Path to Superlight Blockchain Clients
with Aggelos Kiayias, Andrianna Polydouri
published at ACM Advances in Financial Technologies 2021 -
Mining in Logarithmic Space
with Aggelos Kiayias, Nikos Leonardos
to appear in ACM Computer and Communications Security 2021 -
SoK: Communication Across Distributed Ledgers
with Alexei Zamyatin, Mustafa Al-Bassam, Eleftherios Kokoris-Kogias, Pedro Moreno-Sanchez, Aggelos Kiayias, William Knottenbelt
published at Financial Crypto 2021 -
BRICK: Asynchronous Payment Channels
with Georgia Avarikioti, Eleftherios Kokoris Kogias, Roger Wattenhofer
published at Financial Crypto 2021 -
Soft Power: Upgrading Chain Macroeconomic Policy Through Soft Fork
published at the Financial Crypto 2021 Workshop on Trusted Smart Contracts -
Decentralized Blockchain Interoperability
PhD Thesis, University of Athens 2020 -
A Gas-Efficient Superlight Bitcoin Client in Solidity
with Stelios Daveas, Kostis Karantias, Aggelos Kiayias
published at ACM Advances in Financial Technologies 2020 -
Updatable Blockchains
with Michele Ciampi, Nikos Karayannidis, Aggelos Kiayias
published at ESORICS 2020 -
Non-Interactive Proofs of Proof-of-Work
with Aggelos Kiayias, Andrew Miller
published at Financial Crypto 2020 -
Proof-of-Burn
with Kostis Karantias, Aggelos Kiayias
published at Financial Crypto 2020 -
Smart Contract Derivatives
with Kostis Karantias, Aggelos Kiayias
published at Mathematical Research for Blockchain Economy 2020 -
Proof-of-Stake Sidechains
with Peter Gaži, Aggelos Kiayias
published at the IEEE Symposium on Security and Privacy 2019, San Francisco, USA -
Proof-of-Work Sidechains
with Aggelos Kiayias
published at Financial Crypto 2019 Workshop on Trusted Smart Contracts, St.Kitts & Nevis -
Cryptocurrency Egalitarianism: A Quantitative Approach
with Dimitris Karakostas, Aggelos Kiayias, Christos Nasikas
published at International Conference on Blockchain Economics, Security and Protocols 2019, Paris, France -
Compact Storage of Superblocks for NIPoPoW Applications
with Kostis Karantias, Aggelos Kiayias, Nikos Leonardos
Mathematical Research for Blockchain Economy 2019, Santorini, Greece
Nominated for Best Paper Award -
Structure and Content of the Visible Darknet
with Zeta Avarikioti, Roman Brunner, Aggelos Kiayias, Roger Wattenhofer
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Trust Is Risk: A Decentralized Financial Trust Platform
with Orfeas Stefanos Thyfronitis Litos
published at Financial Cryptography and Data Security 2017, Malta -
CTX: Eliminating BREACH with Context Hiding
with Dimitris Karakostas, Aggelos Kiayias, Eva Sarafianou
presented at Black Hat Europe 2016, London, UK -
Practical New Developments on BREACH
with Dimitris Karakostas
presented at Black Hat Asia 2016, Singapore -
OpenBazaar: Trust in Decentralized Anonymous Marketplaces
MEng Thesis, National Technical University of Athens, 2016
👨🏼🏫 Mentoring
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Shresth Agrawal (Jacobs University)
BSc Thesis '22 University of Bremen, Superlight Clients for Proof of Stake Ethereum - Apostolos Tzinas (Software Engineer at Common Prefix)
- Nikolas Kamarinakis (Software Engineer at Common Prefix)
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Andrianna Polydouri (Security Engineer at Dedaub)
MSc Thesis '20 University of Athens, Non-Interactive Proofs of Proof-of-Work under Velvet Forks
published at ACM Advances in Financial Technologies 2021 -
Stelios Daveas (Software Engineer at Axelar)
MSc Thesis '20 University of Athens, Gas-Efficient Verification of Non-Interactive Proofs of Proof-of-Work
published at ACM Advances in Financial Technologies 2020 -
Kostis Karantias (Software Engineer at ChainLink)
MEng Thesis '19 University of Ioannina, Enabling NIPoPoW Applications on Bitcoin Cash
published at Mathematical Research for Blockchain Economy 2019 -
Orestis Konstantinidis
MSc Thesis '19 University of Athens, Monero Mining: CryptoNight Analysis -
Roman Brunner (PhD candidate at the Norwegian University of Science and Technology)
BSc Thesis '18 ETH Zürich, Structure and Content of the Visible Darknet -
Georgios Christoglou (Software Engineer at Microsoft)
MEng Thesis '18 Imperial College London, Enabling crosschain transactions using NIPoPoWs -
Dimitris Grigoriou (Software Engineer at ChainLink)
BSc Thesis '18 University of Athens, Extending Compression Attack Frameworks Against Real Systems -
Christos Porios (Master in Public Policy student at Harvard Kennedy School)
BSc Thesis '17 Imperial College London, A bcoin.js Implementation of Trust-is-Risk -
Orfeas Stefanos Thyfronitis Litos (Post-doc at TU Darmstadt)
MEng Thesis '17 National Technical University of Athens, Trust is Risk
published at Financial Crypto 2017 -
Eva Sarafianou (Security Engineer at auth0)
MEng Thesis '17 National Technical University of Athens, Tool for cryptographic compression side channel attacks against TLS
presented at Real World Crypto 2017 -
K. Andrikopoulos (Security Engineer at GRNet) & D. Kolotouros (Head of IT Security at GRNet)
MEng Thesis '16 National Technical University of Athens, Multi-Party Off-the-Record Messaging Implementation -
Dimitris Karakostas (Post-doc at the University of Edinburgh)
MEng Thesis '16 National Technical University of Athens, Optimizations on Compression–Encryption Attacks against TLS
presented at Black Hat ASIA 2016 - Themis Papameletiou (Software Engineer at Common Prefix)
- Dimitris Lamprinos (Software Engineer at Common Prefix)
- Vitalis Salis (Software Engineer at Babylon)
- Petros Angelatos (Software Engineer at Materialize, former CTO at Balena)
- Aleksis Brezas (CTO at Maya Insights)