# Indy Github Repositories

* [/indy-plenum](https://github.com/hyperledger/indy-plenum) - Byzantine Fault Tolerant Protocol [[**wiki**](https://github.com/hyperledger/indy-plenum/wiki)]
    > "Byzantine fault tolerance is a sub-field of fault tolerance research inspired by the Byzantine Generals' Problem, which is a generalized version of the Two Generals' Problem." 
    * [Storage components](https://github.com/hyperledger/indy-plenum/blob/master/docs/storage.md) - As of now, RocksDB is used as a key-value database for all Storages.
* [/indy-sdk](https://github.com/hyperledger/indy-sdk) - Everything needed to build applications that interact with an Indy distributed identity ledger.
  * [MAINTAINERS.md](https://github.com/hyperledger/indy-sdk/blob/master/MAINTAINERS.md)
* [/indy-node](https://github.com/hyperledger/indy-node) - The server portion of a distributed ledger purpose-built for decentralized identity.
* [/indy-anoncreds](https://github.com/hyperledger/indy-anoncreds) - Anonymous credentials protocol implementation in python
* [/indy-agent](https://github.com/hyperledger/indy-agent) - reference agents and associated tools.
* [/indy-test-automation](https://github.com/hyperledger/indy-test-automation) - Automation tools for testing of Indy Project components.
* [/indy-post-install-automation](https://github.com/hyperledger/indy-post-install-automation)
* [/indy-hipe](https://github.com/hyperledger/indy-hipe) - 
Hyperledger Indy Project Enhancements
  * https://indy.readthedocs.io/projects/hipe/en/latest/
* [/indy-crypto](https://github.com/hyperledger/indy-crypto) - shared crypto library for Hyperledger Indy components. To be:
* [/ursa](https://github.com/hyperledger/ursa) [[**ϟ**](https://www.hyperledger.org/blog/2018/12/04/welcome-hyperledger-ursa)][[**ϟ**](https://www.coindesk.com/hyperledger-launches-cryptography-toolbox-for-blockchain-developers)] "includes the Hyperledger Indy-Crypto code base that is the building block for anonymous credentials, the verifiable credentials protocol, in indy-sdk used by the Sovrin Network. [...]  We are hopeful the shared library will help other platforms better incorporate and use ZKP-based credentials and leverage Sovrin for their identity component." (From Nathan George on Sovrin Telegram) [[**wiki**](https://wiki.hyperledger.org/projects/ursa)]