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Make ciphertext in power basis representation by default #221

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tlepoint opened this issue Nov 8, 2023 · 0 comments

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tlepoint commented Nov 8, 2023

Currently, the lib handles plaintext and ciphertexts in NTT representation.
Instead, it may be desirable to handle them in PowerBasis representation.

We should make sure that such a change doesn't impact the performances (it will some of them, so it's important to measure to decide if the change is worth it);
The expansion, instead of multiplying with a monomial, should use the fact that we are in power basis representation to easily multiply.
To still allow for fast multiplication by plaintext, it should probably store both the poly and poly_ntt

tlepoint added the enhancement label

tlepoint mentioned this issue

Serialize ciphertext in power basis representation #229

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