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Extending Coggia-Couvreur Attack on Loidreau's Rank-metric Cryptosystem
July 14, 2020 Β· Declared Dead Β· π Designs, Codes and Cryptography
"No code URL or promise found in abstract"
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Authors
Anirban Ghatak
arXiv ID
2007.07354
Category
cs.IT: Information Theory
Citations
14
Venue
Designs, Codes and Cryptography
Last Checked
4 months ago
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. The secret matrix component of Loidreau's scheme is chosen over a defining subspace of the field associated with the rank-metric code. We partially extend the Coggia-Couvreur attack to deal with the case when the defining subspace has dimension greater than 2.
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