private static void RunSecureComputationParty(int startPort, int numberOfParties, int localPartyId, BitArray localInput, BitArray expectedOutput)
{
using (IMultiPartyNetworkSession session = TestNetworkSession.EstablishMultiParty(localPartyId, numberOfParties))
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
IObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer(
new SecurityParameters(47, 23, 4, 1, 1),
cryptoContext
);
IMultiplicativeSharing multiplicativeSharing = new ObliviousTransferMultiplicativeSharing(
obliviousTransfer,
cryptoContext
);
GMWSecureComputation computation = new GMWSecureComputation(session, multiplicativeSharing, cryptoContext);
SetIntersectionCircuitRecorder circuitRecorder = new SetIntersectionCircuitRecorder(numberOfParties, localInput.Length);
CircuitBuilder circuitBuilder = new CircuitBuilder();
circuitRecorder.Record(circuitBuilder);
ForwardCircuit circuit = new ForwardCircuit(circuitBuilder.CreateCircuit());
BitArray output = computation.EvaluateAsync(circuit, circuitRecorder.InputMapping, circuitRecorder.OutputMapping, localInput).Result;
CollectionAssert.AreEqual(
expectedOutput,
output,
"Incorrect output {0} (should be {1}).",
output.ToBinaryString(),
expectedOutput.ToBinaryString()
);
}
}
}
private static void RunSecureComputationParty(int localPartyId, BitArray localInput)
{
using (IMultiPartyNetworkSession session = CreateLocalSession(localPartyId, StartPort, NumberOfParties))
{
using (CryptoContext cryptoContext = CryptoContext.CreateDefault())
{
IObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer(
SecurityParameters.CreateDefault768Bit(),
cryptoContext
);
IMultiplicativeSharing multiplicativeSharing = new ObliviousTransferMultiplicativeSharing(
obliviousTransfer,
cryptoContext
);
GMWSecureComputation computation = new GMWSecureComputation(session, multiplicativeSharing, cryptoContext);
Stopwatch stopwatch = Stopwatch.StartNew();
SetIntersectionSecureProgram secureProgram = new SetIntersectionSecureProgram(NumberOfParties, NumberOfElements);
object[] outputPrimitives = secureProgram.EvaluateAsync(computation, new[] { localInput }).Result;
BitArray intersection = (BitArray)outputPrimitives[0];
BigInteger count = (BigInteger)outputPrimitives[1];
stopwatch.Stop();
Console.WriteLine();
Console.WriteLine("Completed protocol as {0} in {1} ms.", session.LocalParty.Name, stopwatch.ElapsedMilliseconds);
Console.WriteLine(" Local input: {0}", localInput.ToBinaryString());
Console.WriteLine(" Computed intersection: {0}", intersection.ToBinaryString());
Console.WriteLine(" Computed number of matches: {0}", count);
}
}
}