bin_fhe_context: Create a Binary FHE context

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

Create a Binary FHE context

Description

Create a Binary FHE context

Usage

bin_fhe_context(
  paramset = BinFHEParamSet$STD128,
  method = BinFHEMethod$GINX,
  arb_func = FALSE,
  log_q = 11L,
  n = 0L,
  time_optimization = FALSE
)

Arguments

paramset	A BinFHEParamSet value (default: STD128)
method	A BinFHEMethod value (default: GINX)
arb_func	If TRUE, build a context that supports arbitrary-function bootstrapping (EvalSign, EvalFunc). Supplying any of arb_func, log_q, n, or time_optimization, even at its default value, selects the C++ overload that derives the parameters from them instead of reading the table for paramset; the two give different contexts for the same paramset.
log_q	log2 of the large ciphertext modulus Q used by functional bootstrapping (default 11; use 17 for the eval-sign example).
n	Ring dimension override (0 lets OpenFHE pick).
time_optimization	Enable the GINX time-optimization variant.

Value

A BinFHEContext object.

Memory

The bootstrapping keys that bin_bt_key_gen() stores in a context can occupy several gigabytes (about 5.8 GB for STD128 with arb_func = TRUE and log_q = 12). R's garbage collector does not see this memory, so removing a context with rm() does not release it until a collection happens to run.

• Build one context and reuse it. The keys depend only on the parameters and the secret key.

• When a context is no longer needed, call bin_clear_bt_keys(). The keys are released at once.

• To release the rest of the context, remove it and call gc().

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