Coconut is a novel selective disclosure credential scheme supporting distributed threshold issuance, public and private attributes, re-randomization, and multiple unlinkable selective attribute revelations. Coconut integrates with blockchains to ensure confidentiality, authenticity and availability even when a subset of credential issuing authorities are malicious or offline. Coconut uses short and computationally efficient credentials, and our evaluation shows that most Coconut cryptographic primitives take just a few milliseconds on average, with verification taking the longest time (10 milliseconds). We implement and evaluate a generic Coconut smart contract library for Chainspace and Ethereum.
A link to the full paper is available at the following address: https://arxiv.org/abs/1802.07344
Coconut is built on top of petlib and bplib, make sure to follow these instructions to install all the pre-requisites.
If you have pip installed, you can install Coconut with the following command:
$ pip install coconut-lib
otherwise, you can build it manually as below:
$ git clone https://github.com/asonnino/coconut
$ cd coconut
$ pip install -e .
Tests can be run as follows:
$ pytest -v --cov=coconut tests/
or simply using tox:
$ tox