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Title:
A note on the implementation of the Number Theoretic Transform
Authors: Michael Scott
Abstract:The Number Theoretic Transform (NTT) is the time critical function required by cryptographic protocols based on the Ring Learning With Errors problem (RLWE),a popular choice for post-quantum cryptography. Here we apply a simple methodology to convert the NTT and its inverse from a mathematically correct (but side-channel vulnerable) description, to an efficient constant-time side-channel resistant version.
ePrint: https://eprint.iacr.org/2017/727
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