Pietrzak Group
Cryptography
The cryptography group works on problems in theoretical and applied cryptography, the science behind information security. Current projects include:
Sustainable Blockchains. The group invents and develops proof systems like proofs of space or verifiable delay functions, and uses them toward constructing new protocols like sustainable blockchains.
Group Messaging. Messaging applications like Signal or WhatsApp are hugely popular and provide surprisingly strong security guarantees. The team works on group messaging, which aims at developing messaging protocols that efficiently scale to large groups without giving up any of the strong security and privacy guarantees of existing solutions.
Leakage-resilient cryptography. The team constructs schemes that are provably secure against “side-channel attacks”, where an attacker exploits information leaked during computation from a cryptographic device like a smart card.
Group Leader
Administrative Support
Team
Current Projects
Sustainable blockchains | Leakage-, Tamper-, and Trojan-resilient cryptography | Group messaging | Adaptive security
Publications
Brzuska C, Ünal A, Woo IKY. 2024. Evasive LWE assumptions: Definitions, classes, and counterexamples. 30th International Conference on the Theory and Application of Cryptology and Information Security. ASIACRYPT: Conference on the Theory and Application of Cryptology and Information Security, LNCS, vol. 15487, 418–449. View
Ebrahimi E, Yadav A. 2024. Strongly secure universal thresholdizer. 30th International Conference on the Theory and Application of Cryptology and Information Security. ASIACRYPT: Conference on the Theory and Application of Cryptology and Information Security vol. 15486, 207–239. View
Anastos M, Auerbach B, Baig MA, Cueto Noval M, Kwan MA, Pascual Perez G, Pietrzak KZ. 2024. The cost of maintaining keys in dynamic groups with applications to multicast encryption and group messaging. 22nd International Conference on Theory of Cryptography. TCC: Theory of Cryptography, LNCS, vol. 15364, 413–443. View
Pascual Perez G. 2024. On the efficiency and security of secure group messaging. Institute of Science and Technology Austria. View
Alwen JF, Auerbach B, Cueto Noval M, Klein K, Pascual Perez G, Pietrzak KZ. 2024. DeCAF: Decentralizable CGKA with fast healing. Security and Cryptography for Networks: 14th International Conference. SCN: Security and Cryptography for Networks, LNCS, vol. 14974, 294–313. View
ReX-Link: Krzysztof Pietrzak
Career
Since 2016 Professor, Institute of Science and Technology Austria (ISTA)
2011 – 2016 Assistant Professor, Institute of Science and Technology Austria (ISTA)
2005 – 2011 Scientific Staff Member, Centrum Wiskunde & Informatica, Amsterdam, The Netherlands
2006 Postdoc, École Normale Supérieure, Paris, France
2005 PhD, ETH Zurich, Switzerland
Selected Distinctions
2015 ERC Consolidator Grant
2010 ERC Starting Grant
Additional Information
Download CV
Open Pietrzak group website
Physics & Beyond at ISTA
