eval_mvb_precompute: Several look-up tables on one input (multi-value...

In openfhe.R: R Interface to the 'OpenFHE' Fully Homomorphic Encryption Library

Several look-up tables on one input (multi-value bootstrapping)

Description

eval_mvb_precompute() does the part of functional bootstrapping that does not depend on the table: it computes the complex exponential of the input and its powers. eval_mvb() and eval_mvb_no_decoding() then apply a table to that precomputation, as eval_fbt() and eval_fbt_no_decoding() do to a ciphertext. Every table applied to one precomputation must have the input modulus and order of the coefficients the precomputation was made with.

Usage

eval_mvb_precompute(ct, coeffs, digit_bit_size, initial_scaling, order = 1L)

eval_mvb(
  ciphertexts,
  coeffs,
  digit_bit_size,
  post_scaling,
  level_to_reduce = 0L,
  order = 1L
)

eval_mvb_no_decoding(ciphertexts, coeffs, digit_bit_size, order = 1L)

Arguments

ct	A Ciphertext.
coeffs	The coefficients of the look-up table; see Details.
digit_bit_size	Integer; number of bits of the input modulus.
initial_scaling	The modulus the input is scaled by, usually get_modulus() of the element parameters from schemelet_get_element_params().
order	Integer; order of the Hermite interpolation. Default 1L.
ciphertexts	A SeriesPowers object from eval_mvb_precompute().
post_scaling	The scale applied to the coefficients (the scale of get_hermite_trig_coefficients()), undone here.
level_to_reduce	Integer; levels to drop before decoding. Default 0L.

Value

eval_mvb_precompute(): a SeriesPowers object. The others: a Ciphertext.

See Also

eval_fbt_setup(), eval_hom_decoding()

openfhe.R documentation built on Nov. 13, 2026, 5:07 p.m.