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Add Point method to check prime order subgroup inclusion #33

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FiloSottile opened this issue Sep 7, 2022 · 0 comments

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FiloSottile commented Sep 7, 2022

Naively, we can do this by multiplying by l and checking if we get the infinity.

That multiplication can be precomputed as an addition chain generated with addchain.

Eventually, we should use Pronin's technique described in https://eprint.iacr.org/2022/1164.pdf.

Wollac mentioned this issue

Point method to check for low-order points #34

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alexqrid mentioned this issue

Do you reject points that are not in the main subgroup? #45

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