Masking, Sequences, and FALCON: A Theoretical Study on Masking Strategies Using Sequences for Non-Linear Operators in the FALCON Post-Quantum Signature

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Post-Quantum Cryptography is now in its deployment phase. Amongst the threats encountered in real-world applications is Side Channel Analysis, a cryptanalysis branch relying on the study of physical leakages from unsecured implementations. However, the FALCON post-quantum signature includes non-linear functions on real numbers, and applying the generic masking countermeasure to these functions has only been recently studied. In this work, we use convergent sequences to approximate the function a