Poseidon

This repository contains:

• poseidon377: an instantiation of the Poseidon hash function for decaf377
• poseidon-paramgen: an independent implementation of Poseidon parameter generation
• poseidon-parameters: types that represent Poseidon parameters
• poseidon-permutation: an independent implementation of the Poseidon permutation
• poseidon-consistency: property-based tests for consistency between Poseidon implementations
• poseidon-tests: test vectors for poseidon-parameters and poseidon377

Audits

poseidon-paramgen was audited by NCC Group in Summer 2022. Note that the audit covered only the parameter generation described in the original Poseidon paper. The Poseidon2 parameter generation is not yet audited.

Benchmarks

Run criterion benchmarks using:

cargo bench

This will generate a report at target/criterion/report/index.html.

Performance benchmarked on commit 9750f5ff01d11f158f111a1a75401901049e5575 on a 2023 Macbook Pro M2 (12 core CPU) with 32 GB memory using our 4-to-1 optimized poseidon hash takes 47.3µs, or ~21,141 hashes/second.

Generate Test Vectors

There is a test utility that will generate the proving and verifying keys for the R1CS tests. These keys are pre-generated to guard against breaking changes to the circuits (e.g. when upgrading Arkworks dependencies).

cargo test generate_test_vectors -- --ignored