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Paper 2021/396

LESS-FM: Fine-tuning Signatures from a Code-based Cryptographic Group Action

Alessandro Barenghi and Jean-Francois Biasse and Edoardo Persichetti and Paolo Santini

Abstract

Code-based cryptographic schemes are highly regarded among the quantum-safe alternatives to current standards. Yet, designing code-based signatures using traditional methods has always been a challenging task, and current proposals are still far from the target set by other post-quantum primitives (e.g. lattice-based). In this paper, we revisit a recent work using an innovative approach for signing, based on the hardness of the code equivalence problem. We introduce some optimizations and provide a security analysis for all variants considered. We then show that the new parameters produce instances of practical interest.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
Code-basedPost-QuantumCode EquivalenceSignatures
Contact author(s)
epersichetti @ fau edu
History
2021-08-12: last of 2 revisions
2021-03-27: received
See all versions
Short URL
https://ia.cr/2021/396
License
Creative Commons Attribution
CC BY
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