Extending Coggia–Couvreur attack on Loidreau’s rank-metric cryptosystem

Article Type

Research Article

Publication Title

Designs, Codes, and Cryptography

Abstract

A recent paper by Coggia and Couvreur presents a polynomial time key-recovery attack on Loidreau’s encryption scheme, based on rank-metric codes, for some parameters. Their attack was formulated for the particular case when the secret matrix in Loidreau’s scheme is restricted to a 2-dimensional subspace. We present an extension of the Coggia–Couvreur attack to deal with secret matrices chosen over subspaces of dimension greater than 2.

First Page

215

Last Page

238

DOI

10.1007/s10623-021-00972-7

Publication Date

1-1-2022

Comments

Open Access, Green

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