International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 15 July 2024

Thomas Debris-Alazard, Pierre Loisel, Valentin Vasseur
ePrint Report ePrint Report
Enhanced pqsigRM is a code-based hash-and-sign scheme proposed to the second National Institute of Standards and Technology call for post-quantum signatures. The scheme is based on the $(U,U+V)$-construction and it enjoys remarkably small signature lengths, about $1$KBytes for a security level of $128$ bits. Unfortunately we show that signatures leak information about the underlying $(U,U+V)$-structure. It allows to retrieve the private-key with~$100, 000$ signatures.
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