Krzysztof Z Pietrzak
Pietrzak Group
108 Publications
2024 | Published | Conference Paper | IST-REx-ID: 18702 |

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.
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2024 | Published | Journal Article | IST-REx-ID: 18961 |

Günther CU, Pietrzak KZ. 2024. Deniability in automated contact tracing: Impossibilities and possibilities. Proceedings on Privacy Enhancing Technologies. 2024(4), 636–648.
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2024 | Published | Conference Paper | IST-REx-ID: 17051 |

Auerbach B, Günther CU, Pietrzak KZ. 2024. Trapdoor memory-hard functions. 43rd Annual International Conference on the Theory and Applications of Cryptographic Techniques. EUROCRYPT: International Conference on the Theory and Applications of Cryptographic Techniques, LNCS, vol. 14653, 315–344.
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2024 | Published | Conference Paper | IST-REx-ID: 17328 |

Chatterjee K, Ebrahimzadeh A, Karrabi M, Pietrzak KZ, Yeo MX, Zikelic D. 2024. Fully automated selfish mining analysis in efficient proof systems blockchains. Proceedings of the 43rd Annual ACM Symposium on Principles of Distributed Computing. PODC: Symposium on Principles of Distributed Computing, 268–278.
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2024 | Published | Conference Paper | IST-REx-ID: 18086
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.
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2023 | Published | Conference Paper | IST-REx-ID: 13143 |

Hoffmann C, Hubáček P, Kamath C, Pietrzak KZ. 2023. Certifying giant nonprimes. Public-Key Cryptography - PKC 2023. PKC: Public-Key Cryptography, LNCS, vol. 13940, 530–553.
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2023 | Published | Conference Paper | IST-REx-ID: 14428 |

Dodis Y, Ferguson N, Goldin E, Hall P, Pietrzak KZ. 2023. Random oracle combiners: Breaking the concatenation barrier for collision-resistance. 43rd Annual International Cryptology Conference. CRYPTO: Advances in Cryptology, LNCS, vol. 14082, 514–546.
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2023 | Published | Conference Paper | IST-REx-ID: 14691 |

Auerbach B, Cueto Noval M, Pascual Perez G, Pietrzak KZ. 2023. On the cost of post-compromise security in concurrent Continuous Group-Key Agreement. 21st International Conference on Theory of Cryptography. TCC: Theory of Cryptography, LNCS, vol. 14371, 271–300.
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2022 | Published | Conference Paper | IST-REx-ID: 17060 |

Tiwari S, Yeo MX, Avarikioti Z, Salem I, Pietrzak KZ, Schmid S. 2022. Wiser: Increasing throughput in payment channel networks with transaction aggregation. Proceedings of the 4th ACM Conference on Advances in Financial Technologies. AFT: Conference on Advances in Financial Technologies, 217–231.
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2022 | Published | Conference Paper | IST-REx-ID: 12167 |

Avarikioti G, Pietrzak KZ, Salem I, Schmid S, Tiwari S, Yeo MX. 2022. Hide & Seek: Privacy-preserving rebalancing on payment channel networks. Financial Cryptography and Data Security. FC: Financial Cryptography and Data Security, LNCS, vol. 13411, 358–373.
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2022 | Published | Conference Paper | IST-REx-ID: 12176 |

Hoffmann C, Hubáček P, Kamath C, Klein K, Pietrzak KZ. 2022. Practical statistically-sound proofs of exponentiation in any group. Advances in Cryptology – CRYPTO 2022. CRYYPTO: International Cryptology Conference, LNCS, vol. 13508, 370–399.
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2022 | Published | Conference Paper | IST-REx-ID: 11476 |

Alwen J, Auerbach B, Cueto Noval M, Klein K, Pascual Perez G, Pietrzak KZ, Walter M. 2022. CoCoA: Concurrent continuous group key agreement. Advances in Cryptology – EUROCRYPT 2022. EUROCRYPT: Annual International Conference on the Theory and Applications of Cryptology and Information Security, LNCS, vol. 13276, 815–844.
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2021 | Published | Conference Paper | IST-REx-ID: 10041 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Wichs D. 2021. Limits on the Adaptive Security of Yao’s Garbling. 41st Annual International Cryptology Conference, Part II . CRYPTO: Annual International Cryptology Conference, LCNS, vol. 12826, 486–515.
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2021 | Published | Conference Paper | IST-REx-ID: 10048 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2021. The cost of adaptivity in security games on graphs. 19th Theory of Cryptography Conference 2021. TCC: Theory of Cryptography Conference.
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2021 | Published | Conference Paper | IST-REx-ID: 10044 |

Kamath Hosdurg C, Klein K, Pietrzak KZ. 2021. On treewidth, separators and Yao’s garbling. 19th Theory of Cryptography Conference 2021. TCC: Theory of Cryptography Conference, 2021/926.
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2021 | Published | Conference Paper | IST-REx-ID: 10407 |

Chakraborty S, Dziembowski S, Gałązka M, Lizurej T, Pietrzak KZ, Yeo MX. 2021. Trojan-resilience without cryptography. TCC: Theory of Cryptography Conference, LNCS, vol. 13043, 397–428.
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2021 | Published | Conference Paper | IST-REx-ID: 10409 |

Kamath Hosdurg C, Klein K, Pietrzak KZ. 2021. On treewidth, separators and Yao’s garbling. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13043, 486–517.
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2021 | Published | Conference Paper | IST-REx-ID: 10410 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2021. The cost of adaptivity in security games on graphs. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13043, 550–581.
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2021 | Published | Conference Paper | IST-REx-ID: 9826 |

Auerbach B, Chakraborty S, Klein K, Pascual Perez G, Pietrzak KZ, Walter M, Yeo MX. 2021. Inverse-Sybil attacks in automated contact tracing. Topics in Cryptology – CT-RSA 2021. CT-RSA: Cryptographers’ Track at the RSA Conference, LNCS, vol. 12704, 399–421.
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2021 | Published | Conference Paper | IST-REx-ID: 9969 |

Pietrzak KZ, Salem I, Schmid S, Yeo MX. 2021. LightPIR: Privacy-preserving route discovery for payment channel networks. 2021 IFIP Networking Conference (IFIP Networking).
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2021 | Published | Conference Paper | IST-REx-ID: 10408 |

Alwen JF, Auerbach B, Baig MA, Cueto Noval M, Klein K, Pascual Perez G, Pietrzak KZ, Walter M. 2021. Grafting key trees: Efficient key management for overlapping groups. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13044, 222–253.
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2021 | Published | Conference Paper | IST-REx-ID: 10049 |

Klein K, Pascual Perez G, Walter M, Kamath Hosdurg C, Capretto M, Cueto Noval M, Markov I, Yeo MX, Alwen JF, Pietrzak KZ. 2021. Keep the dirt: tainted TreeKEM, adaptively and actively secure continuous group key agreement. 2021 IEEE Symposium on Security and Privacy . SP: Symposium on Security and Privacy, 268–284.
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2020 | Published | Conference Paper | IST-REx-ID: 8987 |

Pietrzak KZ. 2020. Delayed authentication: Preventing replay and relay attacks in private contact tracing. Progress in Cryptology. INDOCRYPT: International Conference on Cryptology in IndiaLNCS vol. 12578, 3–15.
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2019 | Published | Conference Paper | IST-REx-ID: 6430 |

Fuchsbauer G, Kamath Hosdurg C, Klein K, Pietrzak KZ. 2019. Adaptively secure proxy re-encryption. PKC: Public-Key Cryptograhy, LNCS, vol. 11443, 317–346.
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2019 | Published | Conference Paper | IST-REx-ID: 7411 |

Abusalah HM, Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2019. Reversible proofs of sequential work. Advances in Cryptology – EUROCRYPT 2019. International Conference on the Theory and Applications of Cryptographic Techniques, LNCS, vol. 11477, 277–291.
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2019 | Published | Conference Paper | IST-REx-ID: 6528 |

Pietrzak KZ. 2019. Simple verifiable delay functions. 10th Innovations in Theoretical Computer Science Conference. ITCS 2019: Innovations in Theoretical Computer Science, LIPIcs, vol. 124, 60.
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2019 | Published | Conference Paper | IST-REx-ID: 6677 |

Choudhuri AR, Hubáček P, Kamath Hosdurg C, Pietrzak KZ, Rosen A, Rothblum GN. 2019. Finding a Nash equilibrium is no easier than breaking Fiat-Shamir. Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing - STOC 2019. STOC: Symposium on Theory of Computing, 1103–1114.
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2018 | Published | Journal Article | IST-REx-ID: 107 |

Dziembowski S, Pietrzak KZ, Wichs D. 2018. Non-malleable codes. Journal of the ACM. 65(4), 20.
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2018 | Published | Conference Paper | IST-REx-ID: 298 |

Alwen JF, Blocki J, Pietrzak KZ. 2018. Sustained space complexity. Eurocrypt 2018: Advances in Cryptology, LNCS, vol. 10821, 99–130.
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2018 | Published | Conference Paper | IST-REx-ID: 302 |

Cohen B, Pietrzak KZ. 2018. Simple proofs of sequential work. Eurocrypt: Advances in Cryptology, LNCS, vol. 10821, 451–467.
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2018 | Published | Conference Paper | IST-REx-ID: 7407 |

Pietrzak KZ. 2018. Proofs of catalytic space. 10th Innovations in Theoretical Computer Science Conference (ITCS 2019). ITCS: Innovations in theoretical Computer Science Conference, LIPIcs, vol. 124, 59:1-59:25.
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2018 | Published | Conference Paper | IST-REx-ID: 193 |

Alwen JF, Gazi P, Kamath Hosdurg C, Klein K, Osang GF, Pietrzak KZ, Reyzin L, Rolinek M, Rybar M. 2018. On the memory hardness of data independent password hashing functions. Proceedings of the 2018 on Asia Conference on Computer and Communication Security. ASIACCS: Asia Conference on Computer and Communications Security , 51–65.
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2018 | Published | Conference Paper | IST-REx-ID: 6941 |

Park S, Kwon A, Fuchsbauer G, Gazi P, Alwen JF, Pietrzak KZ. 2018. SpaceMint: A cryptocurrency based on proofs of space. 22nd International Conference on Financial Cryptography and Data Security. FC: Financial Cryptography and Data Security, LNCS, vol. 10957, 480–499.
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2017 | Published | Conference Paper | IST-REx-ID: 559 |

Abusalah HM, Alwen JF, Cohen B, Khilko D, Pietrzak KZ, Reyzin L. 2017. Beyond Hellman’s time-memory trade-offs with applications to proofs of space. ASIACRYPT: Theory and Applications of Cryptology and Information Security, LNCS, vol. 10625, 357–379.
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2017 | Published | Conference Paper | IST-REx-ID: 637 |

Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs D. 2017. Be adaptive avoid overcommitting. CRYPTO: Cryptology, LNCS, vol. 10401, 133–163.
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2017 | Published | Journal Article | IST-REx-ID: 1187 |

Kiltz E, Pietrzak KZ, Venturi D, Cash D, Jain A. 2017. Efficient authentication from hard learning problems. Journal of Cryptology. 30(4), 1238–1275.
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2017 | Published | Conference Paper | IST-REx-ID: 605 |

Brody J, Dziembowski S, Faust S, Pietrzak KZ. 2017. Position based cryptography and multiparty communication complexity. TCC: Theory of Cryptography Conference, LNCS, vol. 10677, 56–81.
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2017 | Published | Journal Article | IST-REx-ID: 6196 |

Gazi P, Pietrzak KZ, Rybar M. 2017. The exact security of PMAC. IACR Transactions on Symmetric Cryptology. 2016(2), 145–161.
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2017 | Published | Conference Paper | IST-REx-ID: 635 |

Alwen JF, Chen B, Pietrzak KZ, Reyzin L, Tessaro S. 2017. Scrypt is maximally memory hard. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 10212, 33–62.
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2017 | Published | Conference Paper | IST-REx-ID: 640 |

Alwen JF, Blocki J, Pietrzak KZ. 2017. Depth-robust graphs and their cumulative memory complexity. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 10212, 3–32.
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2017 | Published | Conference Paper | IST-REx-ID: 697 |

Pietrzak KZ, Skórski M. 2017. Non uniform attacks against pseudoentropy. ICALP: International Colloquium on Automata, Languages, and Programming, LIPIcs, vol. 80, 39.
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2016 | Published | Conference Paper | IST-REx-ID: 1229 |

Abusalah HM, Fuchsbauer G, Pietrzak KZ. 2016. Offline witness encryption. ACNS: Applied Cryptography and Network Security, LNCS, vol. 9696, 285–303.
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2016 | Published | Conference Paper | IST-REx-ID: 1236 |

Abusalah HM, Fuchsbauer G, Pietrzak KZ. 2016. Constrained PRFs for unbounded inputs. CT-RSA: Topics in Cryptology, LNCS, vol. 9610, 413–428.
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2016 | Published | Conference Paper | IST-REx-ID: 1179 |

Pietrzak KZ, Maciej S. 2016. Pseudoentropy: Lower-bounds for chain rules and transformations. TCC: Theory of Cryptography Conference, LNCS, vol. 9985, 183–203.
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2016 | Published | Conference Paper | IST-REx-ID: 1653 |

Okamoto T, Pietrzak KZ, Waters B, Wichs D. 2016. New realizations of somewhere statistically binding hashing and positional accumulators. ASIACRYPT: Theory and Application of Cryptology and Information Security, LNCS, vol. 9452, 121–145.
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2016 | Published | Conference Paper | IST-REx-ID: 1231 |

Alwen JF, Chen B, Kamath Hosdurg C, Kolmogorov V, Pietrzak KZ, Tessaro S. 2016. On the complexity of scrypt and proofs of space in the parallel random oracle model. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 9666, 358–387.
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2016 | Published | Conference Paper | IST-REx-ID: 1233 |

Fuchsbauer G, Heuer F, Kiltz E, Pietrzak KZ. 2016. Standard security does imply security against selective opening for markov distributions. TCC: Theory of Cryptography Conference, LNCS, vol. 9562, 282–305.
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2016 | Published | Journal Article | IST-REx-ID: 1479 |

Krenn S, Pietrzak KZ, Wadia A, Wichs D. 2016. A counterexample to the chain rule for conditional HILL entropy. Computational Complexity. 25(3), 567–605.
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2015 | Published | Conference Paper | IST-REx-ID: 1646 |

Banerjee A, Fuchsbauer G, Peikert C, Pietrzak KZ, Stevens S. 2015. Key-homomorphic constrained pseudorandom functions. 12th Theory of Cryptography Conference. TCC: Theory of Cryptography Conference, LNCS, vol. 9015, 31–60.
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2015 | Published | Conference Paper | IST-REx-ID: 1648 |

Fuchsbauer G, Jafargholi Z, Pietrzak KZ. 2015. A quasipolynomial reduction for generalized selective decryption on trees. CRYPTO: International Cryptology Conference, LNCS, vol. 9215, 601–620.
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2015 | Published | Conference Paper | IST-REx-ID: 1649 |

Benhamouda F, Krenn S, Lyubashevsky V, Pietrzak KZ. 2015. Efficient zero-knowledge proofs for commitments from learning with errors over rings. 9326, 305–325.
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2015 | Published | Conference Paper | IST-REx-ID: 1650 |

Skórski M, Golovnev A, Pietrzak KZ. 2015. Condensed unpredictability . ICALP: Automata, Languages and Programming, LNCS, vol. 9134, 1046–1057.
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2015 | Published | Conference Paper | IST-REx-ID: 1654 |

Gazi P, Pietrzak KZ, Tessaro S. 2015. Generic security of NMAC and HMAC with input whitening. 9453, 85–109.
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2015 | Published | Conference Paper | IST-REx-ID: 1669 |

Pietrzak KZ, Skórski M. 2015. The chain rule for HILL pseudoentropy, revisited. 9230, 81–98.
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2015 | Published | Conference Paper | IST-REx-ID: 1671 |

Gazi P, Pietrzak KZ, Tessaro S. 2015. The exact PRF security of truncation: Tight bounds for keyed sponges and truncated CBC. CRYPTO: International Cryptology Conference, LNCS, vol. 9215, 368–387.
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2015 | Published | Conference Paper | IST-REx-ID: 1675 |

Dziembowski S, Faust S, Kolmogorov V, Pietrzak KZ. 2015. Proofs of space. 35th Annual Cryptology Conference. CRYPTO: International Cryptology Conference, LNCS, vol. 9216, 585–605.
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2014 | Published | Journal Article | IST-REx-ID: 2852
Fischlin M, Lehmann A, Pietrzak KZ. 2014. Robust multi-property combiners for hash functions. Journal of Cryptology. 27(3), 397–428.
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2014 | Published | Conference Paper | IST-REx-ID: 1927 |

Fuchsbauer G, Konstantinov M, Pietrzak KZ, Rao V. 2014. Adaptive security of constrained PRFs. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) vol. 8874, 173–192.
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2014 | Published | Conference Paper | IST-REx-ID: 2082 |

Gazi P, Pietrzak KZ, Rybar M. 2014. The exact PRF-security of NMAC and HMAC. CRYPTO: International Cryptology Conference, LNCS, vol. 8616, 113–130.
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2014 | Published | Conference Paper | IST-REx-ID: 2185 |

Dodis Y, Pietrzak KZ, Wichs D. 2014. Key derivation without entropy waste. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 8441, 93–110.
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2014 | Published | Conference Paper | IST-REx-ID: 2219 |

Kiltz E, Masny D, Pietrzak KZ. 2014. Simple chosen-ciphertext security from low noise LPN. IACR: International Conference on Practice and Theory in Public-Key Cryptography, LNCS, vol. 8383, 1–18.
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2014 | Published | Conference Paper | IST-REx-ID: 2236 |

Jetchev D, Pietrzak KZ. 2014. How to fake auxiliary input. TCC: Theory of Cryptography Conference, LNCS, vol. 8349, 566–590.
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2013 | Published | Conference Paper | IST-REx-ID: 2258 |

Kiltz E, Pietrzak KZ, Szegedy M. 2013. Digital signatures with minimal overhead from indifferentiable random invertible functions. 8042, 571–588.
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2013 | Published | Conference Paper | IST-REx-ID: 2259 |

Alwen JF, Krenn S, Pietrzak KZ, Wichs D. 2013. Learning with rounding, revisited: New reduction properties and applications. 8042(1), 57–74.
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2013 | Published | Report | IST-REx-ID: 2274 |

Dziembowski S, Faust S, Kolmogorov V, Pietrzak KZ. 2013. Proofs of Space, IST Austria,p.
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2013 | Published | Conference Paper | IST-REx-ID: 2940 |

Krenn S, Pietrzak KZ, Wadia A. 2013. A counterexample to the chain rule for conditional HILL entropy, and what deniable encryption has to do with it. TCC: Theory of Cryptography Conference, LNCS, vol. 7785, 23–39.
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2012 | Published | Conference Paper | IST-REx-ID: 3279
Jain A, Pietrzak KZ, Tentes A. 2012. Hardness preserving constructions of pseudorandom functions. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 369–382.
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2012 | Published | Conference Paper | IST-REx-ID: 3280 |

Pietrzak KZ. 2012. Subspace LWE. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 548–563.
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2012 | Published | Conference Paper | IST-REx-ID: 3281
Pietrzak KZ, Rosen A, Segev G. 2012. Lossy functions do not amplify well. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 458–475.
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2012 | Published | Conference Paper | IST-REx-ID: 3282 |

Dodis Y, Pietrzak KZ, Kiltz E, Wichs D. 2012. Message authentication, revisited. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 7237, 355–374.
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2012 | Published | Conference Paper | IST-REx-ID: 2974 |

Jain A, Krenn S, Pietrzak KZ, Tentes A. 2012. Commitments and efficient zero knowledge proofs from learning parity with noise. ASIACRYPT: Theory and Application of Cryptology and Information Security, LNCS, vol. 7658, 663–680.
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2012 | Published | Conference Paper | IST-REx-ID: 2048 |

Faust S, Pietrzak KZ, Schipper J. 2012. Practical leakage-resilient symmetric cryptography. Conference proceedings CHES 2012. CHES: Cryptographic Hardware and Embedded Systems, LNCS, vol. 7428, 213–232.
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2012 | Published | Conference Paper | IST-REx-ID: 2049 |

Heyse S, Kiltz E, Lyubashevsky V, Paar C, Pietrzak KZ. 2012. Lapin: An efficient authentication protocol based on ring-LPN. Conference proceedings FSE 2012. FSE: Fast Software Encryption, LNCS, vol. 7549, 346–365.
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2011 | Published | Conference Paper | IST-REx-ID: 3238
Kiltz E, Pietrzak KZ, Cash D, Jain A, Venturi D. 2011. Efficient authentication from hard learning problems. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 6632, 7–26.
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2008 | Published | Conference Paper | IST-REx-ID: 3225
Fischlin M, Lehmann A, Pietrzak KZ. 2008. Robust multi property combiners for hash functions revisited. ICALP: Automata, Languages and Programming, LNCS, vol. 5126, 655–666.
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2008 | Published | Journal Article | IST-REx-ID: 3227
Zubielik P, Nadaczny J, Pietrzak KZ, Lawenda M. 2008. Elektrowiz – system of measurement data management. Przeglad Elektrotechniczny. 84(10), 239–242.
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108 Publications
2024 | Published | Conference Paper | IST-REx-ID: 18702 |

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.
[Preprint]
View
| DOI
| Download Preprint (ext.)
2024 | Published | Journal Article | IST-REx-ID: 18961 |

Günther CU, Pietrzak KZ. 2024. Deniability in automated contact tracing: Impossibilities and possibilities. Proceedings on Privacy Enhancing Technologies. 2024(4), 636–648.
[Published Version]
View
| Files available
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2024 | Published | Conference Paper | IST-REx-ID: 17051 |

Auerbach B, Günther CU, Pietrzak KZ. 2024. Trapdoor memory-hard functions. 43rd Annual International Conference on the Theory and Applications of Cryptographic Techniques. EUROCRYPT: International Conference on the Theory and Applications of Cryptographic Techniques, LNCS, vol. 14653, 315–344.
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2024 | Published | Conference Paper | IST-REx-ID: 17328 |

Chatterjee K, Ebrahimzadeh A, Karrabi M, Pietrzak KZ, Yeo MX, Zikelic D. 2024. Fully automated selfish mining analysis in efficient proof systems blockchains. Proceedings of the 43rd Annual ACM Symposium on Principles of Distributed Computing. PODC: Symposium on Principles of Distributed Computing, 268–278.
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2024 | Published | Conference Paper | IST-REx-ID: 18086
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.
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2023 | Published | Conference Paper | IST-REx-ID: 13143 |

Hoffmann C, Hubáček P, Kamath C, Pietrzak KZ. 2023. Certifying giant nonprimes. Public-Key Cryptography - PKC 2023. PKC: Public-Key Cryptography, LNCS, vol. 13940, 530–553.
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2023 | Published | Conference Paper | IST-REx-ID: 14428 |

Dodis Y, Ferguson N, Goldin E, Hall P, Pietrzak KZ. 2023. Random oracle combiners: Breaking the concatenation barrier for collision-resistance. 43rd Annual International Cryptology Conference. CRYPTO: Advances in Cryptology, LNCS, vol. 14082, 514–546.
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2023 | Published | Conference Paper | IST-REx-ID: 14691 |

Auerbach B, Cueto Noval M, Pascual Perez G, Pietrzak KZ. 2023. On the cost of post-compromise security in concurrent Continuous Group-Key Agreement. 21st International Conference on Theory of Cryptography. TCC: Theory of Cryptography, LNCS, vol. 14371, 271–300.
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2022 | Published | Conference Paper | IST-REx-ID: 17060 |

Tiwari S, Yeo MX, Avarikioti Z, Salem I, Pietrzak KZ, Schmid S. 2022. Wiser: Increasing throughput in payment channel networks with transaction aggregation. Proceedings of the 4th ACM Conference on Advances in Financial Technologies. AFT: Conference on Advances in Financial Technologies, 217–231.
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2022 | Published | Conference Paper | IST-REx-ID: 12167 |

Avarikioti G, Pietrzak KZ, Salem I, Schmid S, Tiwari S, Yeo MX. 2022. Hide & Seek: Privacy-preserving rebalancing on payment channel networks. Financial Cryptography and Data Security. FC: Financial Cryptography and Data Security, LNCS, vol. 13411, 358–373.
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2022 | Published | Conference Paper | IST-REx-ID: 12176 |

Hoffmann C, Hubáček P, Kamath C, Klein K, Pietrzak KZ. 2022. Practical statistically-sound proofs of exponentiation in any group. Advances in Cryptology – CRYPTO 2022. CRYYPTO: International Cryptology Conference, LNCS, vol. 13508, 370–399.
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2022 | Published | Conference Paper | IST-REx-ID: 11476 |

Alwen J, Auerbach B, Cueto Noval M, Klein K, Pascual Perez G, Pietrzak KZ, Walter M. 2022. CoCoA: Concurrent continuous group key agreement. Advances in Cryptology – EUROCRYPT 2022. EUROCRYPT: Annual International Conference on the Theory and Applications of Cryptology and Information Security, LNCS, vol. 13276, 815–844.
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2021 | Published | Conference Paper | IST-REx-ID: 10041 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Wichs D. 2021. Limits on the Adaptive Security of Yao’s Garbling. 41st Annual International Cryptology Conference, Part II . CRYPTO: Annual International Cryptology Conference, LCNS, vol. 12826, 486–515.
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2021 | Published | Conference Paper | IST-REx-ID: 10048 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2021. The cost of adaptivity in security games on graphs. 19th Theory of Cryptography Conference 2021. TCC: Theory of Cryptography Conference.
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2021 | Published | Conference Paper | IST-REx-ID: 10044 |

Kamath Hosdurg C, Klein K, Pietrzak KZ. 2021. On treewidth, separators and Yao’s garbling. 19th Theory of Cryptography Conference 2021. TCC: Theory of Cryptography Conference, 2021/926.
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2021 | Published | Conference Paper | IST-REx-ID: 10407 |

Chakraborty S, Dziembowski S, Gałązka M, Lizurej T, Pietrzak KZ, Yeo MX. 2021. Trojan-resilience without cryptography. TCC: Theory of Cryptography Conference, LNCS, vol. 13043, 397–428.
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2021 | Published | Conference Paper | IST-REx-ID: 10409 |

Kamath Hosdurg C, Klein K, Pietrzak KZ. 2021. On treewidth, separators and Yao’s garbling. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13043, 486–517.
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2021 | Published | Conference Paper | IST-REx-ID: 10410 |

Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2021. The cost of adaptivity in security games on graphs. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13043, 550–581.
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2021 | Published | Conference Paper | IST-REx-ID: 9826 |

Auerbach B, Chakraborty S, Klein K, Pascual Perez G, Pietrzak KZ, Walter M, Yeo MX. 2021. Inverse-Sybil attacks in automated contact tracing. Topics in Cryptology – CT-RSA 2021. CT-RSA: Cryptographers’ Track at the RSA Conference, LNCS, vol. 12704, 399–421.
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2021 | Published | Conference Paper | IST-REx-ID: 9969 |

Pietrzak KZ, Salem I, Schmid S, Yeo MX. 2021. LightPIR: Privacy-preserving route discovery for payment channel networks. 2021 IFIP Networking Conference (IFIP Networking).
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2021 | Published | Conference Paper | IST-REx-ID: 10408 |

Alwen JF, Auerbach B, Baig MA, Cueto Noval M, Klein K, Pascual Perez G, Pietrzak KZ, Walter M. 2021. Grafting key trees: Efficient key management for overlapping groups. 19th International Conference. TCC: Theory of Cryptography, LNCS, vol. 13044, 222–253.
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2021 | Published | Conference Paper | IST-REx-ID: 10049 |

Klein K, Pascual Perez G, Walter M, Kamath Hosdurg C, Capretto M, Cueto Noval M, Markov I, Yeo MX, Alwen JF, Pietrzak KZ. 2021. Keep the dirt: tainted TreeKEM, adaptively and actively secure continuous group key agreement. 2021 IEEE Symposium on Security and Privacy . SP: Symposium on Security and Privacy, 268–284.
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2020 | Published | Conference Paper | IST-REx-ID: 8987 |

Pietrzak KZ. 2020. Delayed authentication: Preventing replay and relay attacks in private contact tracing. Progress in Cryptology. INDOCRYPT: International Conference on Cryptology in IndiaLNCS vol. 12578, 3–15.
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2019 | Published | Conference Paper | IST-REx-ID: 6430 |

Fuchsbauer G, Kamath Hosdurg C, Klein K, Pietrzak KZ. 2019. Adaptively secure proxy re-encryption. PKC: Public-Key Cryptograhy, LNCS, vol. 11443, 317–346.
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2019 | Published | Conference Paper | IST-REx-ID: 7411 |

Abusalah HM, Kamath Hosdurg C, Klein K, Pietrzak KZ, Walter M. 2019. Reversible proofs of sequential work. Advances in Cryptology – EUROCRYPT 2019. International Conference on the Theory and Applications of Cryptographic Techniques, LNCS, vol. 11477, 277–291.
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2019 | Published | Conference Paper | IST-REx-ID: 6528 |

Pietrzak KZ. 2019. Simple verifiable delay functions. 10th Innovations in Theoretical Computer Science Conference. ITCS 2019: Innovations in Theoretical Computer Science, LIPIcs, vol. 124, 60.
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2019 | Published | Conference Paper | IST-REx-ID: 6677 |

Choudhuri AR, Hubáček P, Kamath Hosdurg C, Pietrzak KZ, Rosen A, Rothblum GN. 2019. Finding a Nash equilibrium is no easier than breaking Fiat-Shamir. Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing - STOC 2019. STOC: Symposium on Theory of Computing, 1103–1114.
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2018 | Published | Journal Article | IST-REx-ID: 107 |

Dziembowski S, Pietrzak KZ, Wichs D. 2018. Non-malleable codes. Journal of the ACM. 65(4), 20.
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2018 | Published | Conference Paper | IST-REx-ID: 298 |

Alwen JF, Blocki J, Pietrzak KZ. 2018. Sustained space complexity. Eurocrypt 2018: Advances in Cryptology, LNCS, vol. 10821, 99–130.
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2018 | Published | Conference Paper | IST-REx-ID: 302 |

Cohen B, Pietrzak KZ. 2018. Simple proofs of sequential work. Eurocrypt: Advances in Cryptology, LNCS, vol. 10821, 451–467.
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2018 | Published | Conference Paper | IST-REx-ID: 7407 |

Pietrzak KZ. 2018. Proofs of catalytic space. 10th Innovations in Theoretical Computer Science Conference (ITCS 2019). ITCS: Innovations in theoretical Computer Science Conference, LIPIcs, vol. 124, 59:1-59:25.
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2018 | Published | Conference Paper | IST-REx-ID: 193 |

Alwen JF, Gazi P, Kamath Hosdurg C, Klein K, Osang GF, Pietrzak KZ, Reyzin L, Rolinek M, Rybar M. 2018. On the memory hardness of data independent password hashing functions. Proceedings of the 2018 on Asia Conference on Computer and Communication Security. ASIACCS: Asia Conference on Computer and Communications Security , 51–65.
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2018 | Published | Conference Paper | IST-REx-ID: 6941 |

Park S, Kwon A, Fuchsbauer G, Gazi P, Alwen JF, Pietrzak KZ. 2018. SpaceMint: A cryptocurrency based on proofs of space. 22nd International Conference on Financial Cryptography and Data Security. FC: Financial Cryptography and Data Security, LNCS, vol. 10957, 480–499.
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2017 | Published | Conference Paper | IST-REx-ID: 559 |

Abusalah HM, Alwen JF, Cohen B, Khilko D, Pietrzak KZ, Reyzin L. 2017. Beyond Hellman’s time-memory trade-offs with applications to proofs of space. ASIACRYPT: Theory and Applications of Cryptology and Information Security, LNCS, vol. 10625, 357–379.
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2017 | Published | Conference Paper | IST-REx-ID: 637 |

Jafargholi Z, Kamath Hosdurg C, Klein K, Komargodski I, Pietrzak KZ, Wichs D. 2017. Be adaptive avoid overcommitting. CRYPTO: Cryptology, LNCS, vol. 10401, 133–163.
[Submitted Version]
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2017 | Published | Journal Article | IST-REx-ID: 1187 |

Kiltz E, Pietrzak KZ, Venturi D, Cash D, Jain A. 2017. Efficient authentication from hard learning problems. Journal of Cryptology. 30(4), 1238–1275.
[Submitted Version]
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2017 | Published | Conference Paper | IST-REx-ID: 605 |

Brody J, Dziembowski S, Faust S, Pietrzak KZ. 2017. Position based cryptography and multiparty communication complexity. TCC: Theory of Cryptography Conference, LNCS, vol. 10677, 56–81.
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2017 | Published | Journal Article | IST-REx-ID: 6196 |

Gazi P, Pietrzak KZ, Rybar M. 2017. The exact security of PMAC. IACR Transactions on Symmetric Cryptology. 2016(2), 145–161.
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2017 | Published | Conference Paper | IST-REx-ID: 635 |

Alwen JF, Chen B, Pietrzak KZ, Reyzin L, Tessaro S. 2017. Scrypt is maximally memory hard. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 10212, 33–62.
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2017 | Published | Conference Paper | IST-REx-ID: 640 |

Alwen JF, Blocki J, Pietrzak KZ. 2017. Depth-robust graphs and their cumulative memory complexity. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 10212, 3–32.
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2017 | Published | Conference Paper | IST-REx-ID: 697 |

Pietrzak KZ, Skórski M. 2017. Non uniform attacks against pseudoentropy. ICALP: International Colloquium on Automata, Languages, and Programming, LIPIcs, vol. 80, 39.
[Published Version]
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2016 | Published | Conference Paper | IST-REx-ID: 1229 |

Abusalah HM, Fuchsbauer G, Pietrzak KZ. 2016. Offline witness encryption. ACNS: Applied Cryptography and Network Security, LNCS, vol. 9696, 285–303.
[Submitted Version]
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2016 | Published | Conference Paper | IST-REx-ID: 1236 |

Abusalah HM, Fuchsbauer G, Pietrzak KZ. 2016. Constrained PRFs for unbounded inputs. CT-RSA: Topics in Cryptology, LNCS, vol. 9610, 413–428.
[Submitted Version]
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2016 | Published | Conference Paper | IST-REx-ID: 1179 |

Pietrzak KZ, Maciej S. 2016. Pseudoentropy: Lower-bounds for chain rules and transformations. TCC: Theory of Cryptography Conference, LNCS, vol. 9985, 183–203.
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2016 | Published | Conference Paper | IST-REx-ID: 1653 |

Okamoto T, Pietrzak KZ, Waters B, Wichs D. 2016. New realizations of somewhere statistically binding hashing and positional accumulators. ASIACRYPT: Theory and Application of Cryptology and Information Security, LNCS, vol. 9452, 121–145.
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2016 | Published | Conference Paper | IST-REx-ID: 1231 |

Alwen JF, Chen B, Kamath Hosdurg C, Kolmogorov V, Pietrzak KZ, Tessaro S. 2016. On the complexity of scrypt and proofs of space in the parallel random oracle model. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 9666, 358–387.
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2016 | Published | Conference Paper | IST-REx-ID: 1233 |

Fuchsbauer G, Heuer F, Kiltz E, Pietrzak KZ. 2016. Standard security does imply security against selective opening for markov distributions. TCC: Theory of Cryptography Conference, LNCS, vol. 9562, 282–305.
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2016 | Published | Journal Article | IST-REx-ID: 1479 |

Krenn S, Pietrzak KZ, Wadia A, Wichs D. 2016. A counterexample to the chain rule for conditional HILL entropy. Computational Complexity. 25(3), 567–605.
[Submitted Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1646 |

Banerjee A, Fuchsbauer G, Peikert C, Pietrzak KZ, Stevens S. 2015. Key-homomorphic constrained pseudorandom functions. 12th Theory of Cryptography Conference. TCC: Theory of Cryptography Conference, LNCS, vol. 9015, 31–60.
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2015 | Published | Conference Paper | IST-REx-ID: 1648 |

Fuchsbauer G, Jafargholi Z, Pietrzak KZ. 2015. A quasipolynomial reduction for generalized selective decryption on trees. CRYPTO: International Cryptology Conference, LNCS, vol. 9215, 601–620.
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2015 | Published | Conference Paper | IST-REx-ID: 1649 |

Benhamouda F, Krenn S, Lyubashevsky V, Pietrzak KZ. 2015. Efficient zero-knowledge proofs for commitments from learning with errors over rings. 9326, 305–325.
[Published Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1650 |

Skórski M, Golovnev A, Pietrzak KZ. 2015. Condensed unpredictability . ICALP: Automata, Languages and Programming, LNCS, vol. 9134, 1046–1057.
[Published Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1654 |

Gazi P, Pietrzak KZ, Tessaro S. 2015. Generic security of NMAC and HMAC with input whitening. 9453, 85–109.
[Submitted Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1669 |

Pietrzak KZ, Skórski M. 2015. The chain rule for HILL pseudoentropy, revisited. 9230, 81–98.
[Submitted Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1671 |

Gazi P, Pietrzak KZ, Tessaro S. 2015. The exact PRF security of truncation: Tight bounds for keyed sponges and truncated CBC. CRYPTO: International Cryptology Conference, LNCS, vol. 9215, 368–387.
[Submitted Version]
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2015 | Published | Conference Paper | IST-REx-ID: 1675 |

Dziembowski S, Faust S, Kolmogorov V, Pietrzak KZ. 2015. Proofs of space. 35th Annual Cryptology Conference. CRYPTO: International Cryptology Conference, LNCS, vol. 9216, 585–605.
[Preprint]
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2014 | Published | Journal Article | IST-REx-ID: 2852
Fischlin M, Lehmann A, Pietrzak KZ. 2014. Robust multi-property combiners for hash functions. Journal of Cryptology. 27(3), 397–428.
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2014 | Published | Conference Paper | IST-REx-ID: 1927 |

Fuchsbauer G, Konstantinov M, Pietrzak KZ, Rao V. 2014. Adaptive security of constrained PRFs. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) vol. 8874, 173–192.
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2014 | Published | Conference Paper | IST-REx-ID: 2082 |

Gazi P, Pietrzak KZ, Rybar M. 2014. The exact PRF-security of NMAC and HMAC. CRYPTO: International Cryptology Conference, LNCS, vol. 8616, 113–130.
[Submitted Version]
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2014 | Published | Conference Paper | IST-REx-ID: 2185 |

Dodis Y, Pietrzak KZ, Wichs D. 2014. Key derivation without entropy waste. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 8441, 93–110.
[Submitted Version]
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2014 | Published | Conference Paper | IST-REx-ID: 2219 |

Kiltz E, Masny D, Pietrzak KZ. 2014. Simple chosen-ciphertext security from low noise LPN. IACR: International Conference on Practice and Theory in Public-Key Cryptography, LNCS, vol. 8383, 1–18.
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2014 | Published | Conference Paper | IST-REx-ID: 2236 |

Jetchev D, Pietrzak KZ. 2014. How to fake auxiliary input. TCC: Theory of Cryptography Conference, LNCS, vol. 8349, 566–590.
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2013 | Published | Conference Paper | IST-REx-ID: 2258 |

Kiltz E, Pietrzak KZ, Szegedy M. 2013. Digital signatures with minimal overhead from indifferentiable random invertible functions. 8042, 571–588.
[Submitted Version]
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2013 | Published | Conference Paper | IST-REx-ID: 2259 |

Alwen JF, Krenn S, Pietrzak KZ, Wichs D. 2013. Learning with rounding, revisited: New reduction properties and applications. 8042(1), 57–74.
[Published Version]
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2013 | Published | Report | IST-REx-ID: 2274 |

Dziembowski S, Faust S, Kolmogorov V, Pietrzak KZ. 2013. Proofs of Space, IST Austria,p.
[Published Version]
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2013 | Published | Conference Paper | IST-REx-ID: 2940 |

Krenn S, Pietrzak KZ, Wadia A. 2013. A counterexample to the chain rule for conditional HILL entropy, and what deniable encryption has to do with it. TCC: Theory of Cryptography Conference, LNCS, vol. 7785, 23–39.
[Submitted Version]
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2012 | Published | Conference Paper | IST-REx-ID: 3279
Jain A, Pietrzak KZ, Tentes A. 2012. Hardness preserving constructions of pseudorandom functions. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 369–382.
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2012 | Published | Conference Paper | IST-REx-ID: 3280 |

Pietrzak KZ. 2012. Subspace LWE. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 548–563.
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2012 | Published | Conference Paper | IST-REx-ID: 3281
Pietrzak KZ, Rosen A, Segev G. 2012. Lossy functions do not amplify well. TCC: Theory of Cryptography Conference, LNCS, vol. 7194, 458–475.
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2012 | Published | Conference Paper | IST-REx-ID: 3282 |

Dodis Y, Pietrzak KZ, Kiltz E, Wichs D. 2012. Message authentication, revisited. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 7237, 355–374.
[Submitted Version]
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2012 | Published | Conference Paper | IST-REx-ID: 2974 |

Jain A, Krenn S, Pietrzak KZ, Tentes A. 2012. Commitments and efficient zero knowledge proofs from learning parity with noise. ASIACRYPT: Theory and Application of Cryptology and Information Security, LNCS, vol. 7658, 663–680.
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2012 | Published | Conference Paper | IST-REx-ID: 2048 |

Faust S, Pietrzak KZ, Schipper J. 2012. Practical leakage-resilient symmetric cryptography. Conference proceedings CHES 2012. CHES: Cryptographic Hardware and Embedded Systems, LNCS, vol. 7428, 213–232.
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2012 | Published | Conference Paper | IST-REx-ID: 2049 |

Heyse S, Kiltz E, Lyubashevsky V, Paar C, Pietrzak KZ. 2012. Lapin: An efficient authentication protocol based on ring-LPN. Conference proceedings FSE 2012. FSE: Fast Software Encryption, LNCS, vol. 7549, 346–365.
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2011 | Published | Conference Paper | IST-REx-ID: 3238
Kiltz E, Pietrzak KZ, Cash D, Jain A, Venturi D. 2011. Efficient authentication from hard learning problems. EUROCRYPT: Theory and Applications of Cryptographic Techniques, LNCS, vol. 6632, 7–26.
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2008 | Published | Conference Paper | IST-REx-ID: 3225
Fischlin M, Lehmann A, Pietrzak KZ. 2008. Robust multi property combiners for hash functions revisited. ICALP: Automata, Languages and Programming, LNCS, vol. 5126, 655–666.
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2008 | Published | Journal Article | IST-REx-ID: 3227
Zubielik P, Nadaczny J, Pietrzak KZ, Lawenda M. 2008. Elektrowiz – system of measurement data management. Przeglad Elektrotechniczny. 84(10), 239–242.
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