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94 Publications

2020 | Thesis | IST-REx-ID: 7896 | OA
On the average-case hardness of total search problems
C. Kamath Hosdurg, On the Average-Case Hardness of Total Search Problems, IST Austria, 2020.
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2020 | Conference Paper | IST-REx-ID: 7966 | OA
Everybody’s a target: Scalability in public-key encryption
B. Auerbach, F. Giacon, E. Kiltz, in:, Advances in Cryptology – EUROCRYPT 2020, Springer Nature, 2020, pp. 475–506.
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2020 | Conference Paper | IST-REx-ID: 8322
Reverse firewalls for actively secure MPCs
S. Chakraborty, S. Dziembowski, J.B. Nielsen, in:, Advances in Cryptology – CRYPTO 2020, Springer Nature, 2020, pp. 732–762.
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2020 | Conference Paper | IST-REx-ID: 8339 | OA
Improved discrete Gaussian and subgaussian analysis for lattice cryptography
N. Genise, D. Micciancio, C. Peikert, M. Walter, in:, 23rd IACR International Conference on the Practice and Theory of Public-Key Cryptography, Springer Nature, 2020, pp. 623–651.
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2019 | Conference Paper | IST-REx-ID: 7136 | OA
Strong chain rules for min-entropy under few bits spoiled
M. Skórski, in:, 2019 IEEE International Symposium on Information Theory, IEEE, 2019.
View | DOI | Download Preprint (ext.) | arXiv
 
2019 | Conference Paper | IST-REx-ID: 7411 | OA
Reversible proofs of sequential work
H.M. Abusalah, C. Kamath Hosdurg, K. Klein, K.Z. Pietrzak, M. Walter, in:, Advances in Cryptology – EUROCRYPT 2019, Springer International Publishing, 2019, pp. 277–291.
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2019 | Journal Article | IST-REx-ID: 5887
Per-session security: Password-based cryptography revisited
G. Demay, P. Gazi, U. Maurer, B. Tackmann, Journal of Computer Security 27 (2019) 75–111.
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2019 | Conference Paper | IST-REx-ID: 6430
Adaptively secure proxy re-encryption
G. Fuchsbauer, C. Kamath Hosdurg, K. Klein, K.Z. Pietrzak, in:, Springer Nature, 2019, pp. 317–346.
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2019 | Conference Paper | IST-REx-ID: 6528 | OA
Simple verifiable delay functions
K.Z. Pietrzak, in:, 10th Innovations in Theoretical Computer Science Conference, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2019.
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2019 | Conference Paper | IST-REx-ID: 6677
Finding a Nash equilibrium is no easier than breaking Fiat-Shamir
A.R. Choudhuri, P. Hubáček, C. Kamath Hosdurg, K.Z. Pietrzak, A. Rosen, G.N. Rothblum, in:, Proceedings of the 51st Annual ACM SIGACT Symposium on Theory of Computing  - STOC 2019, ACM Press, 2019, pp. 1103–1114.
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2019 | Book Chapter | IST-REx-ID: 6726
Sampling the integers with low relative error
M. Walter, in:, J. Buchmann, A. Nitaj, T. Rachidi (Eds.), Progress in Cryptology – AFRICACRYPT 2019, Springer Nature, Cham, 2019, pp. 157–180.
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2018 | Conference Paper | IST-REx-ID: 7407 | OA
Proofs of catalytic space
K.Z. Pietrzak, in:, 10th Innovations in Theoretical Computer Science  Conference (ITCS 2019), Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2018, p. 59:1-59:25.
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2018 | Journal Article | IST-REx-ID: 5980
Private set-intersection with common set-up
S. Chatterjee, C. Kamath Hosdurg, V. Kumar, American Institute of Mathematical Sciences 12 (2018) 17–47.
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2018 | Conference Paper | IST-REx-ID: 298 | OA
Sustained space complexity
J.F. Alwen, J. Blocki, K.Z. Pietrzak, in:, Springer, 2018, pp. 99–130.
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2018 | Conference Paper | IST-REx-ID: 300 | OA
On the bit security of cryptographic primitives
D. Micciancio, M. Walter, in:, M. Walter (Ed.), Springer, 2018, pp. 3–28.
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2018 | Conference Paper | IST-REx-ID: 302 | OA
Simple proofs of sequential work
B. Cohen, K.Z. Pietrzak, in:, Springer, 2018, pp. 451–467.
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2018 | Conference Paper | IST-REx-ID: 6941 | OA
SpaceMint: A cryptocurrency based on proofs of space
S. Park, A. Kwon, G. Fuchsbauer, P. Gazi, J.F. Alwen, K.Z. Pietrzak, in:, 22nd International Conference on Financial Cryptography and Data Security, Springer Nature, 2018, pp. 480–499.
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2018 | Conference Paper | IST-REx-ID: 193 | OA
On the memory hardness of data independent password hashing functions
J.F. Alwen, P. Gazi, C. Kamath Hosdurg, K. Klein, G.F. Osang, K.Z. Pietrzak, L. Reyzin, M. Rolinek, M. Rybar, in:, Proceedings of the 2018 on Asia Conference on Computer and Communication Security, ACM, 2018, pp. 51–65.
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2018 | Thesis | IST-REx-ID: 83 | OA
Proof systems for sustainable decentralized cryptocurrencies
H.M. Abusalah, Proof Systems for Sustainable Decentralized Cryptocurrencies, IST Austria, 2018.
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2018 | Journal Article | IST-REx-ID: 107
Non-malleable codes
S. Dziembowski, K.Z. Pietrzak, D. Wichs, Journal of the ACM 65 (2018).
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2018 | Conference Paper | IST-REx-ID: 108 | OA
Inverted leftover hash lemma
M. Obremski, M. Skorski, in:, IEEE, 2018.
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2017 | Conference Paper | IST-REx-ID: 559 | OA
Beyond Hellman’s time-memory trade-offs with applications to proofs of space
H.M. Abusalah, J.F. Alwen, B. Cohen, D. Khilko, K.Z. Pietrzak, L. Reyzin, in:, Springer, 2017, pp. 357–379.
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2017 | Conference Paper | IST-REx-ID: 605 | OA
Position based cryptography and multiparty communication complexity
J. Brody, S. Dziembowski, S. Faust, K.Z. Pietrzak, in:, Y. Kalai, L. Reyzin (Eds.), Springer, 2017, pp. 56–81.
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2017 | Conference Paper | IST-REx-ID: 609 | OA
Moderately hard functions: Definition, instantiations, and applications
J.F. Alwen, B. Tackmann, in:, Y. Kalai, L. Reyzin (Eds.), Springer, 2017, pp. 493–526.
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2017 | Journal Article | IST-REx-ID: 6196 | OA
The exact security of PMAC
P. Gazi, K.Z. Pietrzak, M. Rybar, IACR Transactions on Symmetric Cryptology 2016 (2017) 145–161.
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2017 | Conference Paper | IST-REx-ID: 635 | OA
Scrypt is maximally memory hard
J.F. Alwen, B. Chen, K.Z. Pietrzak, L. Reyzin, S. Tessaro, in:, J.-S. Coron, J. Buus Nielsen (Eds.), Springer, 2017, pp. 33–62.
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2017 | Conference Paper | IST-REx-ID: 637 | OA
Be adaptive avoid overcommitting
Z. Jafargholi, C. Kamath Hosdurg, K. Klein, I. Komargodski, K.Z. Pietrzak, D. Wichs, in:, J. Katz, H. Shacham (Eds.), Springer, 2017, pp. 133–163.
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2017 | Conference Paper | IST-REx-ID: 640 | OA
Depth-robust graphs and their cumulative memory complexity
J.F. Alwen, J. Blocki, K.Z. Pietrzak, in:, J.-S. Coron, J. Buus Nielsen (Eds.), Springer, 2017, pp. 3–32.
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2017 | Conference Paper | IST-REx-ID: 648 | OA
On the complexity of breaking pseudoentropy
M. Skórski, in:, G. Jäger, S. Steila (Eds.), Springer, 2017, pp. 600–613.
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2017 | Conference Paper | IST-REx-ID: 650 | OA
A cryptographic view of regularity lemmas: Simpler unified proofs and refined bounds
M. Skórski, in:, G. Jäger, S. Steila (Eds.), Springer, 2017, pp. 586–599.
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2017 | Conference Paper | IST-REx-ID: 6526 | OA
On the complexity of estimating Rènyi divergences
M. Skórski, in:, 2017 IEEE International Symposium on Information Theory (ISIT), IEEE, 2017.
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2017 | Conference Paper | IST-REx-ID: 6527 | OA
Practical graphs for optimal side-channel resistant memory-hard functions
J.F. Alwen, J. Blocki, B. Harsha, in:, Proceedings of the 2017 ACM SIGSAC Conference on Computer and Communications Security, ACM Press, 2017, pp. 1001–1017.
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2017 | Conference Paper | IST-REx-ID: 697 | OA
Non uniform attacks against pseudoentropy
K.Z. Pietrzak, M. Skórski, in:, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2017.
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2017 | Conference Paper | IST-REx-ID: 710 | OA
Renyi entropy estimation revisited
M. Obremski, M. Skórski, in:, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2017.
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2017 | Thesis | IST-REx-ID: 838 | OA
(The exact security of) Message authentication codes
M. Rybar, (The Exact Security of) Message Authentication Codes, IST Austria, 2017.
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2017 | Journal Article | IST-REx-ID: 1187 | OA
Efficient authentication from hard learning problems
E. Kiltz, K.Z. Pietrzak, D. Venturi, D. Cash, A. Jain, Journal of Cryptology 30 (2017) 1238–1275.
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2017 | Conference Paper | IST-REx-ID: 1174 | OA
Lower bounds on key derivation for square-friendly applications
M. Skórski, in:, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2017.
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2017 | Conference Paper | IST-REx-ID: 1175 | OA
Cumulative space in black-white pebbling and resolution
J.F. Alwen, S. De Rezende, J. Nordstrom, M. Vinyals, in:, C. Papadimitriou (Ed.), Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2017, p. 38:1-38-21.
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2017 | Conference Paper | IST-REx-ID: 1176 | OA
Towards practical attacks on Argon2i and balloon hashing
J.F. Alwen, J. Blocki, in:, IEEE, 2017.
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2016 | Journal Article | IST-REx-ID: 1592
Structure preserving signatures and commitments to group elements
M. Abe, G. Fuchsbauer, J. Groth, K. Haralambiev, M. Ohkubo, Journal of Cryptology 29 (2016) 363–421.
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2016 | Conference Paper | IST-REx-ID: 1653 | OA
New realizations of somewhere statistically binding hashing and positional accumulators
T. Okamoto, K.Z. Pietrzak, B. Waters, D. Wichs, in:, Springer, 2016, pp. 121–145.
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2016 | Conference Paper | IST-REx-ID: 1225 | OA
Practical round-optimal blind signatures in the standard model from weaker assumptions
G. Fuchsbauer, C. Hanser, C. Kamath Hosdurg, D. Slamanig, in:, Springer, 2016, pp. 391–408.
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2016 | Conference Paper | IST-REx-ID: 1229 | OA
Offline witness encryption
H.M. Abusalah, G. Fuchsbauer, K.Z. Pietrzak, in:, Springer, 2016, pp. 285–303.
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2016 | Conference Paper | IST-REx-ID: 1231 | OA
On the complexity of scrypt and proofs of space in the parallel random oracle model
J.F. Alwen, B. Chen, C. Kamath Hosdurg, V. Kolmogorov, K.Z. Pietrzak, S. Tessaro, in:, Springer, 2016, pp. 358–387.
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2016 | Conference Paper | IST-REx-ID: 1233 | OA
Standard security does imply security against selective opening for markov distributions
G. Fuchsbauer, F. Heuer, E. Kiltz, K.Z. Pietrzak, in:, Springer, 2016, pp. 282–305.
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2016 | Conference Paper | IST-REx-ID: 1235 | OA
Constrained PRFs for unbounded inputs with short keys
H.M. Abusalah, G. Fuchsbauer, in:, Springer, 2016, pp. 445–463.
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2016 | Conference Paper | IST-REx-ID: 1236 | OA
Constrained PRFs for unbounded inputs
H.M. Abusalah, G. Fuchsbauer, K.Z. Pietrzak, in:, Springer, 2016, pp. 413–428.
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2016 | Conference Paper | IST-REx-ID: 1365 | OA
Efficiently computing data-independent memory-hard functions
J.F. Alwen, J. Blocki, in:, Springer, 2016, pp. 241–271.
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2016 | Conference Paper | IST-REx-ID: 1366 | OA
Provably robust sponge-based PRNGs and KDFs
P. Gazi, S. Tessaro, in:, Springer, 2016, pp. 87–116.
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2016 | Journal Article | IST-REx-ID: 1479 | OA
A counterexample to the chain rule for conditional HILL entropy
S. Krenn, K.Z. Pietrzak, A. Wadia, D. Wichs, Computational Complexity 25 (2016) 567–605.
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