eval_bootstrap_setup: Set up CKKS bootstrapping

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

Set up CKKS bootstrapping

Description

The multiplicative depth of cc must be at least get_bootstrap_depth() for level_budget. At OpenFHE 1.6.1 the library does not check this, and a setup with precompute = TRUE on a shallower context ends the R session.

Usage

eval_bootstrap_setup(
  cc,
  level_budget = c(5L, 4L),
  dim1 = c(0L, 0L),
  slots = 0L,
  correction_factor = 0L,
  precompute = TRUE,
  bt_slots_encoding = FALSE
)

Arguments

cc	A CryptoContext
level_budget	Integer vector of length 2 (default: c(5, 4))
dim1	Integer vector of length 2 (default: c(0, 0))
slots	Number of slots (default: 0 = automatic)
correction_factor	Correction factor (default: 0)
precompute	Logical; compute the encoding and decoding plaintexts of bootstrapping now (default: TRUE). With FALSE, call eval_bootstrap_precompute() before eval_bootstrap().
bt_slots_encoding	Logical; controls whether the bootstrap precomputes with slot-count encoding (the BTSlotsEncoding tail argument on cryptocontext.h line 3513). Default FALSE matching the C++ default.

Value

Invisibly, the cc crypto context that was passed in. Called for its side effect: the linear transforms bootstrapping needs are precomputed and cached inside the C++ context. Call it before eval_bootstrap_key_gen().

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