Falcon Python Bindings

Python bindings for the Falcon post-quantum signature scheme, implemented in Rust using PyO3.

Features

• Two security levels:
  • Falcon-512 (NIST security level 1)
  • Falcon-1024 (NIST security level 5)
• Complete functionality:
  • Key pair generation
  • Message signing (both attached and detached signatures)
  • Signature verification
• High performance - Rust implementation provides faster operations than pure Python
• Type annotated - full .pyi stub file included

Installation

pip install falcon-python

For building from source:

pip install maturin
maturin build --release
pip install ./target/wheels/falcon_python-*.whl

Quick Start

from falcon_python import Falcon512, Falcon1024

# Falcon-512 example
pub, priv = Falcon512.generate_keypair()
message = b"Important message"

# Attached signature
signed = Falcon512.sign_message(message, priv)
verified_msg = Falcon512.verify_sign(signed, pub)

# Detached signature
signature = Falcon512.detached_sign(priv, message)
is_valid = Falcon512.verify_detached_sign(signature, message, pub)

Key Sizes

Security Notice

This implementation uses the reference implementation from PQClean. While Falcon has been selected for standardization by NIST, this is still a relatively new cryptographic algorithm. Use in production systems should be done with proper security considerations.

License

MIT License. Contains code derived from PQClean project (also MIT licensed).