generate_lut_via_function: Generate a lookup table for an arbitrary plaintext function

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

Generate a lookup table for an arbitrary plaintext function

Description

Computes f(0:(p-1), p) and returns it as a numeric vector suitable for eval_func(). This is the R-side analogue of OpenFHE's GenerateLUTviaFunction — we don't bind the C++ helper because its signature takes a raw function pointer that can't capture an R closure, and R is natively vectorised so a pure-R helper is both simpler and faster than wiring an R callback through cpp11.

Usage

generate_lut_via_function(f, p)

Arguments

f	A function ⁠function(m, p)⁠ that returns the table entry for input m under plaintext modulus p. Vectorised functions are supported.
p	The plaintext modulus (typically get_max_plaintext_space(ctx))

Value

A length-p numeric vector of LUT entries

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