Léo Ducas
 Full Name
 Dr. L. Ducas
 Function(s)
 Scientific Staff Member
 L.Ducas@cwi.nl
 Telephone
 +31 20 592 4250
 Room
 M260
 Department(s)
 Cryptology
 Homepage
 https://homepages.cwi.nl/~ducas/
Biography
I have obtained my PhD at ENS Paris, on the topic of Latticebased Cryptography. After a postdoc at UCSD, I have joined CWI in 2015. I obtained a VENI grant in 2016, and started a tenuretrack at CWI in 2017.Research
I do research on cryptology, and I am more specifically interested in theoretical and practical aspects of latticebased cryptography.
I am involved in the design of fast algorithms for use in latticebased cryptographic protocols, and in the design of optimized cryptographic protocols for practice. This work includes candidates Quantumsafe protocols for the NIST standardization competition (NewHope, Frodo, Kyber, Dilithium).
I am also interested the precise security estimations of lattice problems, the fine tuning of cryptanalytic algorithm and their implementation. In particular I am very active in the development of the FPLLL lattice reduction library, so as to test in practice the latest algorithmic advances, but also to provide useful tools for prototyping new algorithms.
I have also contributed to quantum cryptanalysis of latticebased schemes, showing that not all lattices problems are equally resistant to quantum computing.
Publications

Albrecht, M, Ducas, L, Herold, G, Kirshanova, E, Postlethwaite, E.W, & Stevens, M.M.J. (2019). The General Sieve Kernel and New Records in Lattice Reduction.

Ducas, L, & PelletMary, A. (2018). On the statistical leak of the GGH13 multilinear map and some variants. In Advances in Cryptology  ASIACRYPT (pp. 465–493). doi:10.1007/9783030033262_16

Yu, Y, & Ducas, L. (2018). Learning strikes again: The case of the DRS signature scheme. In Advances in Cryptology  ASIACRYPT 2018 (pp. 525–543). doi:10.1007/9783030033293_18

Ducas, L, & Pierrot, C.A. (2018). Polynomial time bounded distance decoding near Minkowski’s bound in discrete logarithm lattices. Designs, Codes and Cryptography. doi:10.1007/s1062301805733

Bonnoron, G, Ducas, L, & Fillinger, M.J. (2018). Large FHE Gates from tensored homomorphic accumulator. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence. doi:10.1007/9783319893396_13

Ducas, L. (2018). Shortest vector from lattice sieving: A few dimensions for free. In Proceedings of the Annual International Conference on the Theory and Applications of Cryptographic Techniques (pp. 125–145). doi:10.1007/9783319783819_5

Bos, J.W, Ducas, L, Kiltz, E, Lepoint, T, Lyubashevsky, V, Schanck, J.M, … Stehlé, D. (2018). CRYSTALS  Kyber: A CCAsecure ModuleLatticeBased KEM. In 3rd IEEE European Symposium on Security and Privacy, EURO S & P 2018 (pp. 353–367). doi:10.1109/EuroSP.2018.00032

de Boer, K, Ducas, L, Jeffery, S, & de Wolf, R. M. (2018). Attacks on the AJPS Mersennebased cryptosystem. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 101–120). doi:10.1007/9783319790633_5

Benhamouda, F, Blazy, O, Ducas, L, & Quach, W. (2018). Hash Proof Systems over lattices revisited. In Lecture Notes in Computer Science/Lecture Notes in Artificial Intelligence (pp. 644–674). doi:10.1007/9783319765815_22

Ducas, L, Kiltz, E, Lepoint, T, Lyubashevsky, V, Schwabe, P, Seiler, G, & Stehlé, D. (2018). CRYSTALSDilithium: A latticebased digital signature scheme. IACR Transactions on Cryptographic Hardware and Embedded Systems, 2018(1), 238–268.
Current projects with external funding

Applications of Arithmetic Secret Sharing Schemes in TwoParty Cryptography

Cryptanalysis of Latticebased Cryptography

Cryptanalysis of Widelyused Hash Function Standards and Beyond

Advies inzake postquantum cryptografie (impact quantum computing op beveiligingswaarde huidige cryptografische technieken) (Advies inzake postquantum cryptografie)

PRivacy preserving pOstquantuM systEms from advanced crypTograpHic mEchanisms Using latticeS (PROMETHEUS)
Awards
 USENIX and Facebook "Internet Defense Prize"  For Newhope, joint work with Erdem Alkim, Thomas Poppelmann, Peter Schwabe (2016)