2024
DOI: 10.21203/rs.3.rs-4383446/v1
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TOPCOAT: Towards Practical Two-Party Crystals-Dilithium

Nikita Snetkov,
Jelizaveta Vakarjuk,
Peeter Laud

Abstract: The development of threshold protocols based on lattice-signature schemes has been of increasing interest in the past several years. The main research focus was towards protocols constructed for various variants of Crystals-Dilithium, future NIST digital signature standard known as ML-DSA. In this work, we propose TOPCOAT, a two-party lattice-based signature algorithm that embodies Dilithium's compression techniques. The aforesaid result is achieved by introducing a new hinting mechanism that allows parties to… Show more

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