Work

VOLE-in-the-head signatures based on the linear code equivalence problem

Year: 2026

Type: article

Abstract: The Vector Oblivious Linear Evaluation in the Head (VOLEitH) paradigm has proven to be a versatile tool to design zero-knowledge proofs and signatures in post-quantum cryptography. In this paper, we propose three VOLE-friendly modellings for Proofs of Knowledge (PoK) of a solution of an instance of the Linear Code Equivalence Problem (LEP). For the first two schemes, we propose two new reductions from LEP to the Multivariate Quadratic (MQ) problem, that may be of independent interest for the cryptanalysis of LEP. Instead, the last model is obtained by generalizing a recent work by Bettaieb et al. to the context of monomial matrices instead of permutation matrices. While our proposed schemes exhibit larger signature sizes compared to LESS, they improve the computational efficiency, reducing the overall complexity from $$O(n^3)$$ to $$O(n^2\log n )$$ and $$O(n^2\log ^2 n )$$ , where n is the length of the code.

Source: Cryptography and Communications

DOI: 10.1007/s12095-026-00869-z

Authors: Michele Battagliola, Laura Mattiuz, Alessio Meneghetti

Institutions: Marche Polytechnic University, University of Trento, University of Bari Aldo Moro

Language: English

Topic: Cryptography and Data Security

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,190