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My name is Giorgos ( pronunciation 😜). I am a Ph.D. Candidate at the ECE department of the University of Maryland, and a Visiting Assistant in Research at Yale, co-advised by Charalampos (Babis) Papamanthou and Jonathan Katz. Previously, I studied CS at AUEB, where I completed both my Bachelor's and Master's.

My research interests are focused in Cryptography and Security, while I am also interested in Complexity and Algorithms. Currently I am mostly working in research topics related to Consensus, its relation to MPC, DKG and other topics and their applications in Blockchains and Cryptocurrencies.

During summer 2023 I worked as a Research Intern at MystenLabs, where I was mentored by Lefteris Kokoris-Kogias. We explored exciting new directions regarding blockchains, consensus and the Sui Blockchain! My main project was related to studying the effect of dynamic allocation of leader nodes in DAG-based consensus, which led to HammerHead.

This summer 2024 I will be working as a Research Intern at Chainlink Labs, where we will be exploring new, exciting open questions related to blockchains and consensus!

Resume (PDF)» Google Scholar»

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Publications

"Towards Optimal Parallel Broadcast under a Dishonest Majority",
Daniel Collins and Sisi Duan and Julian Loss and Charalampos Papamanthou and G. Tsimos and Haochen Wang,
Cryptology ePrint Archive: Report 2022/1383. Submitted

"Sublinear-Round Broadcast without Trusted Setup",
Andreea B. Alexandru and Julian Loss and Charalampos Papamanthou and G. Tsimos and Benedikt Wagner,
Cryptology ePrint Archive: Report 2022/1383. Submitted

"HammerHead: Leader Reputation for Dynamic Scheduling",
G. Tsimos and Anastasios Kichidis and Alberto Sonnino and Lefteris Kokoris-Kogias,
IEEE ICDCS 2024 Accepted!

"Deterministic Byzantine Agreement with Adaptive O(n·f) Communication",
Fatima Elsheimy and G. Tsimos and Charalampos Papamanthou,
SODA 2024 Accepted!

"Gossiping For Communication-Efficient Broadcast",
G. Tsimos and Julian Loss and Charalampos Papamanthou,
CRYPTO 2022 Accepted! Talk»

Manuscripts

• "Sublinear-round Broadcast without trusted setup against dishonest majority",
  Andreea B. Alexandru and Julian Loss and Charalampos Papamanthou and G. Tsimos,
  Cryptology ePrint Archive: Report 2022/1383. Manuscript
• "A Comparative Research between the relation of various Satisfiability Problems and Complexity Classes",
  G. Tsimos,
  For completion of Master of Science in Computer Science, Athens University of Economics and Business, July 2019.

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Awards and Honors

• Student Travel Grant,

  SIAM, SODA January 2024

  Grant $650

• "Clark School of Engineering Dean's Fellowship",

  Department of Electrical and Computer Engineering, University of Maryland (UMD), September 2019

  Grant $15,000

• "Outstanding Academic Performance Scholarship",

  Gerondelis Foundation, June 2022

  Grant $5,000

• Valedictorian of the September 2018 class of Graduates,

  Bachelor of Computer Science, Athens University of Economics and Business (AUEB),

  Commencement Date: February 21, 2019

• “Award in Memory of Michalis Mitilinaios",

  for especially High Performance in courses “Automata and Complexity”, “Logic” and “Computability and Complexity”, Academic Year 2016-2017,

  Department of Computer Science, Athens University of Economics and Business (AUEB),

  Grant €300

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Selected Graduate Coursework

@UMD

• CMSC754 Computational Geometry, (Pr. David Mount)
• CMSC858T Secure Distributed Computation, (Pr. Jonathan Katz)
• CMSC818F Advanced Cryptography and Hostile Governments, (Pr. Ian Miers)
• ENEE657 Computer Security, (Pr. Tudor Dumitras)
• ENEE620 Random Processes in Communications and Controls, (Pr. Behtash Babadi)
• ENEE621 Information Theory, (Pr. Prakash Narayan)
• ENEE641 Algorithms, (Pr. Uzi Vishkin)

@AUEB

• M32218F Blockchains and Smart Contracts, (Dr. Nikos Fotiou)
• M32214F Cryptography and Applications, (Pr. Ioannis Marias)
• M32106F Deep Learning, (Dr. Makis Malakasiotis)
• M32207F Algorithmic Game Theory, (Pr. Evangelos Markakis)
• M32210F Social Networks: Theory and Practice, (Pr. Iordanis Koutsopoulos)

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Contact