Stefanos Chaliasos
PhD student, Imperial College London, London, UK
Security Researcher, zkSecurity
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. Stefanos is also a Security Researcher at zkSecurity focusing on securing protocols developing and using ZKPs.
He has previously worked as an R&D Engineer in Veridise Inc. and as a Research Scientist in MatterLabs developing automated techniques for testing Zero Knowledge Proof (ZKP) circuits and analyzing protocols using ZKPs. 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
Jul 5, 2024 | I will present our paper “SoK: What don’t we know? Understanding Security Vulnerabilities in SNARKs” in SBC conference. |
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Jul 3, 2024 | Our paper “Analyzing and Benchmarking ZK-Rollups” has been accepted at AFT’24. |
Jul 2, 2024 | Our paper “zk-Bench: A Toolset for Comparative Evaluation and Performance Benchmarking of SNARKs” has been accepted at SCN’24. |
Jun 6, 2024 | Our paper “SoK: What don’t we know? Understanding Security Vulnerabilities in SNARKs” has been accepted at USENIX Security’24. |
Selected Publications
- AFT’24
- USENIX SEC’23
Activities
PC Member
- 2024: FC, ISSTA/ECOOP (Tool Demos), ACM DeFi
- 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
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Doctoral Scholarship Award, Imperial College London
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ICSE 21 Best Artifact Award for “Replication Package for Article: Data-Oriented Differential Testing of Object-Relational Mapping Systems”
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PLDI’22 Distinguished Paper Award for “Finding Typing Compiler Bugs”
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PLDI’22 Best Artifact Award for “Finding Typing Compiler Bugs”
Talks
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ESORICS (2019): Mime Artist: Bypassing Whitelisting for the Web with JavaScript Mimicry Attacks
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OOPSLA (2021): Well-Typed Programs Can Go Wrong: A Study of Typing-Related Bugs in JVM Compilers
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Thesis Presentation @UOA (2021): A Study of Typing-Related Bugs in JVM Compilers
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PLDI/SIGPLAN Track (2022): Well-Typed Programs Can Go Wrong: A Study of Typing-Related Bugs in JVM Compilers
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Seminar Presentation @AUEB’s BALAB (2022): Decentralized Finance and Empirical Studies in Solidity Smart Contracts
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Dagstuhl Seminar on DeFi Security (2022): Finding Bugs in zkEVMs
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Crypto Economics Security Conference (2022): A Study of Inline Assembly in Solidity Smart Contracts
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OOPSLA (2022): A Study of Inline Assembly in Solidity Smart Contracts
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TAROT (2023): Fuzzing Zero Knowledge Proof Circuits
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SBC (2023): Smart Contract and DeFi Security Tools: Do They Meet the Needs of Practitioners?
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zkSummit 10 (2023): ZK Vulnerabilities and Attacks
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Seminar Presentation @ETH’s AST Lab (2023): ZK Security and Formal Methods
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Seminar Presentation @UCL’s CREST lab (2023): Smart Contract and DeFi Security Tools: Do They Meet the Needs of Practitioners?
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ZKProof 6 (2024): SoK: What don’t we know? Understanding Security Vulnerabilities in SNARKs
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Seminar Presentation @OpenZeppelin (2024): SoK: What don’t we know? Understanding Security Vulnerabilities in SNARKs
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Monerokon (2024): SoK: What don’t we know? Understanding Security Vulnerabilities in SNARKs