Skip to main content

Create and verify distributed multi-party signatures

Project description

A command-line tool for creating and verifying distributed multi-party signatures.


$ virtualenv env
$ . env/bin/activate
$ pip install -e .


Key generation

On one machine, run:

$ partysig keygen start

On the other machines, run:

$ partysig keygen join


On the machine with the file to sign, run:

$ partysig sign start FILE

On the other machines, run:

$ partysig sign join

Verifying signatures


$ partysig verify FILE SIGNATURE


The current signature version (v1) implements Bitcoin-style multi-sig, where the overall multisignature contains:

  • The number of signatures required for the multisignature to be valid
  • The public keys allowed to create signatures
  • Signatures from a subset of those keys

The first two parts together are equivalent to a Bitcoin script, and are similarly hashed to get the “master key” for the multi-party signature group. Ed25519 is used for the individual signatures, and BLAKE2b is used for creating the master key.

Signature format

Version    (1-byte uint)     \
Threshold  (1-byte uint)      |_ Hashed to obtain
Size       (1-byte uint)      |  the master key
Pubkeys    (32 x size bytes) /
Signatures (64 x threshold bytes)


Project details

Release history Release notifications

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
partysig-0.0.1.tar.gz (22.7 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page