Presentation Exchange – Credential Query Infra

Sphereon as part of its Vindicatio project brings the new DIF Presentation Exchange to DIF/W3C SSI solutions compatible with Aries Present Proof Protocol v2 using a layered approach to achieve both integration and interoperability.





Additional Info

At the lowest layers there are TypeScript (Javascript) libraries for the rules engine component, validations and logic. These libraries are easy to integrate in other projects for both web and mobile. The models and a REST API are also exposed using an OpenApi specification close to the VCC HTTP API as well as Sphereon�s own implementation. The models can be generated to a programming language of choice.
The REST Api and state machine can run in Docker and exposes the functionality to other programming languages for a more direct integration. Then there is a stateful bridge that integrates DIDComm v2 and CHAPI (and future OpenID-Connect). The bridge will be similar to Aries Present Proof v2 and integrate with it and in the future support a backend like Verity or similar as well. This means parties can talk using Presentation Exchange compatible datastructures, across different transports and with different products.

Enduser Relevance

Sphereon focus on Digital Identities and Verifiable Credentials solutions, helping people and businesses to take control of their private data in business, government, healthcare and education domains.


Sphereon B.V.


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Country:  Netherlands

Status: Operational technology (practical and/or commercial viability)

Category: Decentralized solutions (including blockchain and distributed ledger technologies)

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