Speranza

Experiments for Speranza, a system for private-but-usable package signing.

Overview

The repository contains:

• a Rust library implementing:
  • Pedersen commitments (src/commitments/pedersen.rs)
  • a Merkle binary prefix tree (src/maps/merkle_bpt.rs)
  • a signing system
• Code for reproducing the results and graphs from the paper:
  • benches/ contains a benchmark
  • make_graphs.py generates graphs.

Requirements

Requirements:

• Rust toolchain (we used the version described in rust-toolchain.toml) including the package manager/build tool cargo.
• cargo-criterion (run cargo install cargo-criterion).
• Python 3 with seaborn (and its dependencies) installed for generating figures.

The easiest way to reproduce will be to use Nix: the project is described in a flake.nix file. Running nix develop on a recent version of Nix will install build and development dependencies.

Reproducing results and figures

First, make sure the project builds and tests pass:

$ cargo test

This will download and install all dependencies.

Now, collect the data:

$ cargo run --bin sizes > sizes.csv
$ cargo criterion --message-format=json > data.json

This shouldn't take more than an hour or so. If the above doesn't work, our data is checked into the repo.

Now, generate the plots:

$ python make_graphs.py

The figures will be in the figures/ directory.