VCs & The Future of Identity
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VCs & The Future of Identity

Combined Session
Wednesday, May 10, 2023 11:00—12:00

How to Build Interoperable Decentralized Identity Systems with OpenID for Verifiable Credentials

OpenID for Verifiable Credentials (OID4VC) is a set of protocols that enables issuance and presentation of verifiable credentials expressed in any format including but not limited to W3C vc-data-model and ISO/IEC 18013-5 mDL. The power of the protocols lies in its demonstrated simplicity, security, and the implementer's ability to make choices across the tech stack - not just for credential formats, but also entity identifiers, trust model, crypto suites, revocation mechanism, etc. However, this also means that to be interoperable and enable certain use-cases(s), implementers need to agree on the sets of choices across the tech stack, usually referred to as interoperability profiles.

In this talk, we will share implementation experience of OID4VC specifications, and introduce existing interoperability profiles based on OID4VC. Of course we will also provide updates to OID4VC specifications, how they have evolved from the last year based on an overwhelming amount of implementation feedback.

Dr. Torsten Lodderstedt
Dr. Torsten Lodderstedt
yes IDP GmbH
Dr.-Ing. Torsten Lodderstedt is managing director at yes with more than 15 years experience in running large scale consumer identity services. In his previous positions, he helped organisations in...
Kristina Yasuda
Kristina Yasuda
Kristina is an Identity Standards Architect at Microsoft, known for her work on standards in decentralized identity ecosystem: as an editor of OpenID for Verifiable Credentials specifications in...

Verifiable Credentials and Dynamic NFTs – Two Sides of the Same Medal

NFTicket is a protocol, which combines the identification power of cryptographic wallets with those of Decentralized Identifiers (DID). We will present that there is functional equivalence of Verifiable Credentials (anchored by a DID) and Non-fungible Tokens (NFTs, anchored by a wallet).

More that showing, we will be introducing a protocol which implements this, so that verified DIDs can issue “business facts”, such as: vouchers, tickets, membership passes, cerificates of ownership – in short anything which can be expressed by Verifiable Credentials.
NFTicket does a bidirectional translation of this VC to an enhanced ERC721 NFT, such that the DID of the holder and the owner wallet of the NFT correspond 1:1 are linked through did:ethr.

We will demonstrate the application of this protocol based on a pilot we have implemented for The Verifiable Credential in this case being Renewable Energy Certificates which are used to decarbonize events with a measurable carbon footprint.

Dr. Harry Behrens
Dr. Harry Behrens
Harry is the CTO and co-founder of bloXmove and has been working in the software and internet industry for more than 20 years. He has been involved with the topic of blockchain and DLT since...


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