mpc-bench

Multi-party computation experimentation library

This library simulates multiple parties who collaborate in a multi-party computation protocol. The simulator assigns each party a single thread and mimics communication channels through asynchronous channels. The number of bytes that each party transfers is tracked, and additional features such as timing allows a developer to get a clear view of performance by examining the resulting statistics after evaluting the protocol.

To implement a protocol, one must implement the Protocol<I,O> trait for a custom struct. I is the input type and O is the output type. The important method here is fn run_party(id: usize, n_parties: usize, this_party: Party, input: I) -> (PartyStats, O);, which contains the code for an individual party to run. The party learns its unique id, the number of total parties n_parties, and its input. The this_party object offers functionality for sending and receiving messages, among others. Next to this party's protocol output, this method must output the party's statistics, which can be done using this_party.get_stats().

After run_party is implemented, a developer can evaluate the protocol for a given number of parties and respective inputs by calling evaluate(5, vec![10; 5]), for example. In this case that would spawn five parties who each have the input 10.