Trinsic developed this framework and we continue to maintain it. There are now several other developers in addition to Trinsic who also contribute to the project.
Hyperledger Indy is a blockchain purpose-built for decentralized identity. The Aries Framework .NET is currently dependent on Hyperledger Indy.
Hyperledger Ursa is a library of cryptography-related code. The cryptography within Aries lives within Ursa.
Updated about 1 year ago