Stefanos Chaliasos

PhD student, Imperial College London, London, UK

Stefanos Chaliasos is a PhD candidate at Imperial College London advised by Dr Ben Livshits and Professor Alastair F. Donaldson. He holds an MSc in Computer Science from the National and Kapodistrian University of Athens and a BSc in Management Science and Technology from the Athens University of Economics and Business.

He has previously worked as an R&D Engineer in Veridise Inc. developing automated techniques for testing Zero Knowledge Proof (ZKP) circuits. Furthermore, he worked in the industry as a software engineer at Greek Research and Technology Network (GRNET) and as a researcher in the FASTEN project.

His main research interests involve Blockchain Security, Software Testing, ZKPs, Program Analysis, and Programming Languages.

News

Nov 19, 2023 Our paper “API-driven Program Synthesis for Testing Static Typing Implementations” has been accepted at POPL’24.
Aug 29, 2023 I will present our work “ZK Vulnerabilities and Attacks” in zkSummit 10 conference.
Aug 24, 2023 I will present our paper “Smart Contract and DeFi Security Tools: Do They Meet the Needs of Practitioners?” in SBC conference.
Aug 24, 2023 Our paper “Smart Contract and DeFi Security Tools: Do They Meet the Needs of Practitioners?” has been accepted at ICSE’24.

Selected Publications

  1. ICSE’24
    Smart Contract and DeFi Security: Insights from Tool Evaluations and Practitioner Surveys
    Stefanos Chaliasos, Marcos Antonios Charalambous, Liyi Zhou, Rafaila Galanopoulou, Arthur Gervais, Dimitris Mitropoulos, and Ben Livshits
    2024
    PDF
  2. USENIX SEC’23
    The blockchain imitation game
    Kaihua Qin, Stefanos Chaliasos, Liyi Zhou, Benjamin Livshits, Dawn Song, and Arthur Gervais
    2023
    PDF
  3. SP’23
    SoK: Decentralized Finance (DeFi) Attacks
    Liyi Zhou, Xihan Xiong, Jens Ernstberger, Stefanos Chaliasos, Zhipeng Wang, Ye Wang, Kaihua Qin, Roger Wattenhofer, Dawn Song, and Arthur Gervais
    2023
    PDF
  4. PLDI’22
    Finding Typing Compiler Bugs
    Stefanos Chaliasos*, Thodoris Sotiropoulos*, Diomidis Spinellis, Arthur Gervais, Ben Livshits, and Dimitris Mitropoulos
    In Proceedings of the 43nd ACM SIGPLAN International Conference on Programming Language Design and Implementation 2022
    * Both authors contributed equal
    Distinguished Paper Award and Best Artifact Award 🏆🏆
    PDF Code Artifact DOI
  5. ICSE’21
    Data-Oriented Differential Testing of Object-Relational Mapping Systems
    Thodoris Sotiropoulos, Stefanos Chaliasos, Vaggelis Atlidakis, Dimitris Mitropoulos, and Diomidis Spinellis
    In 43rd International Conference on Software Engineering 2021
    Distinguished Artifact Award 🏆
    PDF Code Artifact DOI

Activities

PC Member

  • 2024: FC
  • 2023: ACM DeFi, POPL (Artifact Evaluation Committee), USENIX Security (Artifact Evaluation Committee), ECOOP (Extended Review Committee & AEC), PLDI (Artifact Evaluation Committee).
  • 2022: PLDI (Artifact Evaluation Committee), OSDI (Artifact Evaluation Committee), ATC (Artifact Evaluation Committee)
  • 2021: OOPSLA (Artifact Evaluation Committee)

External Reviewer/Subreviewer

  • EUROSEC, MSR, ESEC/FSE (Industry Track), S&P, USENIX Security, FC, CCS, NDSS

Awards and Honours

  • Doctoral Scholarship Award, Imperial College London

  • ICSE 21 Best Artifact Award for “Replication Package for Article: Data-Oriented Differential Testing of Object-Relational Mapping Systems”

  • PLDI’22 Distinguished Paper Award for “Finding Typing Compiler Bugs”

  • PLDI’22 Best Artifact Award for “Finding Typing Compiler Bugs”

Talks

  • ESORICS (2019): Mime Artist: Bypassing Whitelisting for the Web with JavaScript Mimicry Attacks

  • OOPSLA (2021): Well-Typed Programs Can Go Wrong: A Study of Typing-Related Bugs in JVM Compilers

  • Thesis Presentation @UOA (2021): A Study of Typing-Related Bugs in JVM Compilers

  • PLDI/SIGPLAN Track (2022): Well-Typed Programs Can Go Wrong: A Study of Typing-Related Bugs in JVM Compilers

  • Seminar Presentation @BALAB (2022): Decentralized Finance and Empirical Studies in Solidity Smart Contracts

  • Dagstuhl Seminar on DeFi Security (2022): Finding Bugs in zkEVMs

  • Crypto Economics Security Conference (2022): A Study of Inline Assembly in Solidity Smart Contracts

  • OOPSLA (2022): A Study of Inline Assembly in Solidity Smart Contracts

  • TAROT (2023): Fuzzing Zero Knowledge Proof Circuits

  • SBC (2023): Smart Contract and DeFi Security Tools: Do They Meet the Needs of Practitioners?

  • zkSummit 10 (2023): ZK Vulnerabilities and Attacks