A non-cooperating party — NCParty • homomorpheR

Sits between the master and the sites in the non-cooperating-parties topology. Two NCPs receive additive shares of each site's contribution; each NCP sums its share across sites and ships the result to the master, who combines the two NCP totals and decrypts. No single party — neither master nor an NCP — sees an individual site's contribution. Use make_ncparty() to construct.

Usage

NCParty(
  name = character(0),
  number = integer(0),
  state = new.env(parent = emptyenv())
)

Arguments

name: short identifier shown in printed output.
number: which share this NCP receives, 1 or 2.
state: an environment for mutable bookkeeping (the list of sites it manages, public key). Default: a fresh empty env.

Value

an S7 object of class NCParty with properties name, number and state. number (1 or 2) records which of the two additive shares this party receives; state holds the sites it manages and the public key. Construct with make_ncparty().

Details

Part of the frozen Paillier-era legacy surface: the NCP masking construction compensated for Paillier's single decryption key, a role that threshold key generation (make_threshold_master()) now fills without extra parties.