Sydney Cryptography Group
Welcome to the homepage for Sydney Cryptography (SyCrypt) Group in the School of Computer Science at the University of Sydney.
SyCrypt Group studies a great range of problems in theoretical and applied cryptography. Our work covers
- fundamental cryptographic primitives and their application in blockchain;
- post-quantum cryptography and its applications;
- distributed cryptography and protocols;
- fairness in multi-party computation;
- privacy-preserving applications;
- game-theoretic mechanism design for decentralized applications.
Join Us
We are always looking for highly motivated PhD students and postdoctoral researchers interested in cryptography, security, distributed systems, and blockchain technologies. If you are excited about advancing the state of the art in these areas, feel free to check homepages of our faculty members. Links are available in [People].
News
| May 2026 | Our work on Threshold Meets Anamorphic Signatures will appear in PoPETS 2026. Congrats Aravind! |
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| Our work on optimal hash ACS and MVBA will appear in CRYPTO 2026. Congrats Qiang, Hanwen & Zhenliang! | |
| Our work on Morphic Accumulator and optimal range proofs, polynomial commitments etc. will appear in CRYPTO 2026. Congrats Jiajun & Qiang! | |
| Apr 2026 | Granted Stellar Development Foundation Research Award 2026 for research in Scalable Threshold Cryptography! Congrats Qiang & Aravind! |
| Our work on sub-quadratic communication Balanced Async coin and ABA will appear in PODC 2026. Congrats Michael, Hanwen & Qiang! |
Grant Support
Our research has been supported fully or in part by several generous grants from:
Selected Publications
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Game Theory Does Not Always Help: The Case of Statistical Multi-party Coin TossingIn Advances in Cryptology - EUROCRYPT 2026 - 45th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Rome, Italy, May 10-14, 2026, Proceedings, Part III, 2026Fairness
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New Constructions of Functional Adaptor Signatures: Broader Functions and Improved EfficiencyIn IEEE Symposium on Security and Privacy, SP 2026, 2026To appearBlockchain & Payments Fairness
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Morphic Accumulators and ApplicationsIn Advances in Cryptology - CRYPTO 2026, 2026To appearCrypto Foundations
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Õptimal Adaptively Secure Hash-based MVBA and Asynchronous Common SubsetIn Advances in Cryptology - CRYPTO 2026, 2026To appearByzantine Consensus
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Balanced and Adaptively Secure Asynchronous Common Coin and Byzantine Agreement With Subquadratic CommunicationIn ACM Symposium on Principles of Distributed Computing, PODC 2026, 2026To appearByzantine Consensus
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Practical Asynchronous Distributed Key Reconfiguration and Its ApplicationsIn IEEE Symposium on Security and Privacy, SP 2026, 2026To appearThreshold Cryptography
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Optimistic Asynchronous Dynamic-committee Proactive Secret SharingIn IEEE Symposium on Security and Privacy, SP 2026, 2026To appearThreshold Cryptography
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Anchor-DKG: Distributed Key Generation with Repeating PartiesIn Proceedings of the 2026 ACM SIGSAC Conference on Computer and Communications Security, 2026To appearThreshold Cryptography Blockchain & Payments