'party->Run( repetitions )' problem

[scg258]

The following circuit will have an error of exceeding the boundary, but if the parameter is removed, the circuit can operate successfully.

suint v1=party->In<mo::MpcProtocol::kBooleanGmw>(mo::ToInput(value),0);
suint v2=party->In<mo::MpcProtocol::kBooleanGmw>(mo::ToInput(value),1);
suint c=v1+v2;

party->Run(2);

The error is:
terminate called after throwing an instance of 'std::out_of_range'
what(): Accessing positions 159 to 477 of 159

[Oleksandr-Tkachenko]

Party::Run currently doesn't work well with repetitions > 1. If you're trying to benchmark multiple runs, one option would be to do something like this:

MOTION/src/examples/aes128/aes128_main.cpp

Lines 60 to 85 in 56fa049

	encrypto::motion::AccumulatedRunTimeStatistics accumulated_statistics;
	encrypto::motion::AccumulatedCommunicationStatistics accumulated_communication_statistics;
	for (std::size_t i = 0; i < number_of_repetitions; ++i) {
	encrypto::motion::PartyPointer party{CreateParty(user_options)};
	// establish communication channels with other parties
	if (protocol_string == "BMR") {
	auto statistics =
	EvaluateProtocol(party, number_of_simd, encrypto::motion::MpcProtocol::kBmr, check);
	accumulated_statistics.Add(statistics);
	} else if (protocol_string == "GMW" || protocol_string == "BooleanGMW") {
	auto statistics = EvaluateProtocol(party, number_of_simd,
	encrypto::motion::MpcProtocol::kBooleanGmw, check);
	accumulated_statistics.Add(statistics);
	} else {
	throw std::invalid_argument("Only GMW or BMR is allowed");
	}
	auto communication_statistics =
	party->GetBackend()->GetCommunicationLayer().GetTransportStatistics();
	accumulated_communication_statistics.Add(communication_statistics);
	}
	std::cout << encrypto::motion::PrintStatistics(
	fmt::format("AES128 with {} SIMD values in {}", number_of_simd, protocol_string),
	accumulated_statistics, accumulated_communication_statistics);

.

[scg258]

Thank you!