A Fault Analysis on SNOVA

SNOVA is a compact, post-quantum signature scheme and a second-round candidate in the NIST PQC competition. This paper analyzes its resistance to fault attacks.

Main contributions:

• Demonstrates key-recovery attacks using transient and permanent faults
• Introduces a novel fault-assisted reconciliation strategy based on solving quadratic systems
• Achieves key recovery with a small number of faulty signatures
• Simulates the impact of fault injections at various security levels
• Proposes a lightweight countermeasure to enhance robustness with minimal performance overhead

This work highlights the urgent need for fault-resilient designs in post-quantum cryptographic primitives.