Protocol to generate secret keys on-the-fly using key-homomorphic PRFs and black-box secret sharing

Requirements:

Charm crypto library: https://github.com/JHUISI/charm

Tendermint: https://tendermint.com/

To test the code locally:

1. Install Tendermint
2. Run tendermint with kvstore app using tendermint node --proxy_app=kvstore

First check secret sharing: Navigate to secretsharing/blackbox/ and run python3 bbss.py. It runs a black-box secret sharing for a default of 4 nodes. For any other number of nodes, try python3 bbss.py -n <number of nodes>

For Shamir secret sharing:

Navigate to secretsharing/shamir and run python3 shamirsharing.py -n <number of nodes>. The default is 4 nodes.

For Combinatorial/Replicated secret sharing:

Navigate to secretsharing/combinatorial and run python3 css.py -n <number of nodes>. The default is 4 nodes.

To check the distributed key generation code: Run sh bbss_dkg_run.sh <number of nodes>. This script runs only for MAC OSX.

Other DKGs using Shamir secret sharing, Replicated secret sharing can be run using

sh shamir_dkg_run.sh <number of nodes>

sh css_dkg_run.sh <number of nodes>

Note:

1. The current code queries or posts transactions on the port 46657, depending on the version of tendermint, the port may have to be changed in the file util/transactionbroadcast.pyto either 26657 or other configured port

2. The majority of code for node can be found in util/node_functions.py