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A question on the accumulation of products. #29

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vincentvbh opened this issue Feb 21, 2024 · 0 comments

vincentvbh commented Feb 21, 2024

Hi all,

I have a question: why don't you accumulate several products at once prior to applying Montgomery reduction?
To be specific, this function https://github.com/formosa-crypto/hakyber/blob/master/code/jasmin/ref/polyvec.jinc#L246.

This is well-known and implemented in https://tches.iacr.org/index.php/TCHES/article/view/8791 and https://eprint.iacr.org/2022/112.

Vincent

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