The Lattice-Based Digital Signature Scheme qTESLA

AuthorAlkim, E.; Barreto, P.S.L.M.; Bindel, N.; Krämer, J.; Longa, P.; Ricardini, J.E.
TypeConference Paper
AbstractWe present qTESLA, a post-quantum provably-secure digital signature scheme that exhibits several attractive features such as simplicity, strong security guarantees against quantum adversaries, and built-in protection against certain side-channel and fault attacks. qTESLA-selected for round 2 of NIST’s post-quantum cryptography standardization project—consolidates a series of recent schemes originating in works by Lyubashevsky, and Bai and Galbraith. We provide full-fledged, constant-time portable C implementations consisting of only about 300 lines of C code, which showcases the code compactness of the scheme. Our results also demonstrate that a conservative, provably-secure signature scheme can be efficient and practical, even with a compact and portable implementation. For instance, our C-only implementation executes signing and verification in approximately 0.9 ms on an x64 Intel processor using the proposed level 1 parameter set. Finally, we also provide AVX2-optimized assembly implementations that achieve an additional factor-1.5 speedup.
ConferenceInternational Conference on Applied Cryptography and Network Security (ACNS) <18, 2020, Online>
PartConti, M.: Applied Cryptography and Network Security. 18th International Conference, ACNS 2020. Proceedings. Pt.I: Rome, Italy, October 19-22, 2020, virtual conference. Cham: Springer Nature, 2020. (Lecture Notes in Computer Science 12146), pp. 441-460
PartnISBN : 9783030578077