multiparty_key_gen: Generate a key pair for a secondary party in threshold FHE

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

Generate a key pair for a secondary party in threshold FHE

Description

The lead party uses key_gen() to generate the initial keypair. Subsequent parties call this with the lead's public key.

Usage

multiparty_key_gen(cc, lead_pk, make_sparse = FALSE, fresh = FALSE)

Arguments

cc	A CryptoContext (must have MULTIPARTY feature enabled)
lead_pk	The lead party's PublicKey, or a list of PrivateKey objects for the form that combines secret keys.
make_sparse	Logical; if TRUE, produce an LWE-sparse secret. Default FALSE to match the C++ header default. RLWE-only semantics; BFV/BGV/CKKS accept both values.
fresh	Logical; if TRUE, sample a fresh secret rather than deriving one from the existing key material. Default FALSE.

Details

OpenFHE declares a second form that takes the secret keys of all parties and returns the key pair of their sum. Pass a list of PrivateKey objects as lead_pk to call it; make_sparse and fresh do not apply to that form.

Value

A KeyPair for this party, or, for a list of secret keys, the key pair of the combined secret.

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