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arXiv · 1812.03286

Cryptanalysis of a One-Time Code-Based Digital Signature Scheme

Paolo Santini·Marco Baldi·Franco Chiaraluce
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Abstract

We consider a one-time digital signature scheme recently proposed by Persichetti and show that a successful key recovery attack can be mounted with limited complexity. The attack we propose exploits a single signature intercepted by the attacker, and relies on a statistical analysis performed over such a signature, followed by information set decoding. We assess the attack complexity and show that a full recovery of the secret key can be performed with a work factor that is far below the claimed security level. The efficiency of the attack is motivated by the sparsity of the signature, which leads to a significant information leakage about the secret key.

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Paolo Santini, Marco Baldi, Franco Chiaraluce. 2018-12-08. Cryptanalysis of a One-Time Code-Based Digital Signature Scheme. https://arxiv.org/abs/1812.03286

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