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() ); } } }
public async Task <BitArray> ComputeMultiplicativeSharesAsync(IMultiPartyNetworkSession session, BitArray leftShares, BitArray rightShares, int numberOfInvocations) { BitArray localMultiplicationShares = new BitArray(numberOfInvocations); if (!IncludesLocalTerms || session.HasEvenNumberOfRemoteParties()) { localMultiplicationShares = leftShares & rightShares; } Task <BitArray>[] pairwiseMultiplicativeSharingTasks = new Task <BitArray> [session.NumberOfParties]; pairwiseMultiplicativeSharingTasks[session.LocalParty.Id] = Task.FromResult(localMultiplicationShares); Parallel.ForEach(session.RemotePartySessions, pairwiseSession => { pairwiseMultiplicativeSharingTasks[pairwiseSession.RemoteParty.Id] = ComputePairwiseMultiplicativeSharesAsync( pairwiseSession, leftShares, rightShares, numberOfInvocations ); }); BitArray[] pairwiseMultiplicativeShares = await Task.WhenAll(pairwiseMultiplicativeSharingTasks).ConfigureAwait(false); return(pairwiseMultiplicativeShares.Aggregate((left, right) => left ^ right)); }
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); } } }
private static async Task RunSecureComputationPartyAsync(int localPartyId, BitArray localInput) { Console.WriteLine($"Starting party {localPartyId}..."); using IMultiPartyNetworkSession session = await TcpMultiPartyNetworkSession.EstablishLoopbackAsync( new Party (localPartyId), StartPort, NumberOfParties ); using CryptoContext cryptoContext = CryptoContext.CreateDefault(); IObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer( SecurityParameters.CreateDefault768Bit(), cryptoContext ); IMultiplicativeSharing multiplicativeSharing = new ObliviousTransferMultiplicativeSharing( obliviousTransfer, cryptoContext ); SecretSharingSecureComputation computation = new SecretSharingSecureComputation( session, multiplicativeSharing, cryptoContext ); Stopwatch stopwatch = Stopwatch.StartNew(); SetIntersectionSecureProgram secureProgram = new SetIntersectionSecureProgram(NumberOfParties, NumberOfElements); object[] outputPrimitives = await secureProgram.EvaluateAsync(computation, new object[] { localInput }); BitArray intersection = (BitArray)outputPrimitives[0]; BigInteger count = (BigInteger)outputPrimitives[1]; stopwatch.Stop(); Console.WriteLine(); Console.WriteLine($"Completed protocol as {session.LocalParty.Name} in {stopwatch.ElapsedMilliseconds} ms."); Console.WriteLine($" Local input: {localInput.ToBinaryString()}"); Console.WriteLine($" Computed intersection: {intersection.ToBinaryString()}"); Console.WriteLine($" Computed number of matches: {count}"); Console.WriteLine(); Console.WriteLine("Press any key to exit."); Console.ReadKey(true); }
private static void PerformSecureComputation(IMultiPartyNetworkSession session, BitArray expectedOutput) { BitArray localInput = Inputs[session.LocalParty.Id]; using CryptoContext cryptoContext = CryptoContext.CreateDefault(); IObliviousTransfer obliviousTransfer = new NaorPinkasObliviousTransfer( new SecurityParameters(47, 23, 4, 1, 1), cryptoContext ); IMultiplicativeSharing multiplicativeSharing = new ObliviousTransferMultiplicativeSharing( obliviousTransfer, cryptoContext ); SecretSharingSecureComputation computation = new SecretSharingSecureComputation( session, multiplicativeSharing, cryptoContext ); SetIntersectionCircuitRecorder circuitRecorder = new SetIntersectionCircuitRecorder( session.NumberOfParties, localInput.Length ); CircuitBuilder circuitBuilder = new CircuitBuilder(); circuitRecorder.Record(circuitBuilder); ForwardCircuit circuit = new ForwardCircuit(circuitBuilder.CreateCircuit()); BitArray actualOutput = computation .EvaluateAsync(circuit, circuitRecorder.InputMapping, circuitRecorder.OutputMapping, localInput) .Result; EnumerableAssert.AreEqual( expectedOutput, actualOutput ); }
public SecretSharingSecureComputation(IMultiPartyNetworkSession multiPartySession, IMultiplicativeSharing multiplicativeSharing, CryptoContext cryptoContext) { MultiPartySession = multiPartySession; _multiplicativeSharing = multiplicativeSharing; _cryptoContext = cryptoContext; }
public GMWBooleanCircuitEvaluator(IMultiPartyNetworkSession session, IMultiplicativeSharing multiplicativeSharing) { _session = session; _multiplicativeSharing = multiplicativeSharing; }
public static bool HasEvenNumberOfRemoteParties(this IMultiPartyNetworkSession session) { int numberOfRemoteParties = session.NumberOfParties - 1; return(numberOfRemoteParties % 2 == 0); }
private static IEnumerable <Party> GetRemoteParties(IMultiPartyNetworkSession multiPartySession) { return(multiPartySession.RemotePartySessions.Select(session => session.RemoteParty)); }