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arXiv · 2112.12445

An analysis of Coggia-Couvreur attack on Loidreau's rank-metric public key encryption scheme in the general case

Pierre Loidreau·Ba-Duc Pham
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Abstract

In this paper we show that in the case where the public-key can be distinguished from a random code in Loidreau's encryption scheme, then Coggia-Couvreur attack can be extended to recover an equivalent secret key. This attack can be conducted in polynomial-time if the masking vector space has dimension 3, thus recovering the results of Ghatak.

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Pierre Loidreau, Ba-Duc Pham. 2021-12-23. An analysis of Coggia-Couvreur attack on Loidreau's rank-metric public key encryption scheme in the general case. https://arxiv.org/abs/2112.12445

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