OT-PCA: New Key-Recovery Plaintext-Checking Oracle Based Side-Channel Attacks on HQC with Offline Templates

arXiv:2609.35205 · cs.CR · Submitted 2026-09-28 · Read on arXiv

cs.CR

Submitted: 2026-09-28

Updated: 2026-09-28

Journal ref: IACR Transactions on Cryptographic Hardware and Embedded Systems (TCHES), 2025(1), 251-274, 2025

DOI: 10.46586/tches.v2025.i1.251-274

Code: https://github.com/ot-pca/ot-pca

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

Reed Muller — 24× in this paper
Trace — 23× in this paper · explained in 2 episodes
Side-Channel Attacks — 21× in this paper
Accuracy — 15× in this paper · explained in 1 episode
Reed Solomon — 13× in this paper
Core — 8× in this paper · explained in 2 episodes
Post-Quantum Cryptography — 7× in this paper
Decode — 6× in this paper · explained in 2 episodes
Hamming Quasi-Cyclic — 5× in this paper
Hamming Distance — 4× in this paper · explained in 2 episodes
Robustness — 3× in this paper · explained in 5 episodes
Information Gain — 2× in this paper · explained in 2 episodes
Activation Function — 1× in this paper · explained in 1 episode
Information Set Decoding — 1× in this paper
Key Encapsulation Mechanism — 1× in this paper
Public Key Encryption — 1× in this paper
Sample Complexity — 1× in this paper · explained in 15 episodes
Verification — 1× in this paper · explained in 2 episodes

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