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Title:
Fault Attacks on MPCitH Signature Schemes
Authors: Harrison Banda, Jan Brinkmann, Juliane Krämer
Abstract:In this work, we present two fault attacks against MPCitH-based signature schemes: we present a key recovery attack and a signature forgery attack, both of which only need a single successful fault injection to succeed. We analyze all five MPCitH-based schemes which are currently analyzed in round 2 of NIST’s additional signature standardization process: Mirath, MQOM, PERK, RYDE, and SDitH. Our analysis shows that all five schemes are vulnerable to at least one of the attacks. We validate the practicality of our attacks using the ChipWhisperer setup and discuss countermeasures to prevent the attacks.
ePrint: https://eprint.iacr.org/2025/1745
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