Welcome to the resource topic for 2023/1188
Title:
A Novel CCA Attack for NTRU+ KEM
Authors: Joohee Lee, Minju Lee, Jaehui Park
Abstract:The KpqC competition has begun in 2022, that aims to standardize Post-Quantum Cryptography (PQC) in the Republic of Korea. Among the 16 submissions of the KpqC competition, the lattice-based schemes exhibit the most promising and balanced features in performance. In this paper, we propose an effective classical CCA attack to recover the transmitted session key for NTRU+, one of the lattice-based Key Encapsulation Mechanisms (KEM) proposed in the KpqC competition, for the first time. With the proposed attacks, we show that all the suggested parameters of NTRU+ do not satisfy the claimed security. We also suggest a way to modify the NTRU+ scheme to defend our attack.
ePrint: https://eprint.iacr.org/2023/1188
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