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Zero Knowledge; Verifiable Credentials; Sovrin

Zero Knowledge; Verifiable Credentials; Sovrin

Combined Session
Thursday, June 06, 2024 15:30—16:30
Location: A 03-04

The Use of Zero Knowledge in Self Sovereign Identities

In the same way Blockchain seems the best solution for a decentralized immutable to support decentralized identities, Zero Knowledge has become as the best technology to build privacy-by-default identity stacks.

We will show how ZK can be use for enabling highly scalable and private identities, solving for multiple use cases and problems like:

  • Proof of Credentials
  • Private credential revocations
  • DID methods that support Key Rotation
  • Nullifiers for DID anti-tracking
  • Proof of execution for trusted self-attestation

We will illustrate these applications with real use cases.

Sebastian Rodriguez
VP of Product
Polygon Labs
I am a tech professional with a diverse background spanning various sectors and company types. My journey has taken me from the agile world of startups, where rapid innovation is the norm, to the...
Discover the Power of the Sovrin Ecosystem

Unleash the potential of decentralized solutions with Sovrin, a trusted foundation for secure and verifiable credentials. For over seven years, the Sovrin Foundation has provided a reliable, well-managed blockchain ledger, enabling innovative self-sovereign identity (SSI) solutions and decentralized trust.

Governments, financial institutions, and stakeholders in highly regulated industries choose Sovrin for its open-source software, open standards, and governance model, ensuring accountability and trust.

Sovrin's tech stack is meticulously architected to prioritize privacy, transparency, agency, autonomy, and integrity in digital transactions. Interoperable with Hyperledger Indy networks, supporting diverse DID methods, and offering seamless interactions with other decentralized identity networks, Sovrin fosters a vibrant and interconnected ecosystem.

Discover real-world success stories, such as the Government of British Columbia's implementation of Sovrin for issuing mining permits and verifiable credentials for practicing lawyers, showcasing how these credentials contribute to the digital economy.

Participate in this session to delve into the opportunities and benefits of utilizing the Sovrin platform for your organization.

Stephen Curran
Board of Trustees Chair
Sovrin Foundation
Stephen Curran is the Sovrin Foundation's Board of Trustees Chair, and has worked with, and volunteered at, the non-profit Foundation for the almost 7 years that the Sovrin MainNet global...
eIDAS2 Toolbox: Selective Disclosure and ZKP in the Identity Wallet

In this session, Sebastian Elfors gives an introduction into what selective disclosure really means for the EUDI Wallet within eIDAS2. He will delve into the topic of what selectively disclosed attributes are, unlinkability between relying parties, range proofs and zero-knowledge proof (ZKP) predicates. He will then dissect the legal definitions of “selective disclosure” within the eIDAS2 proposal as well as the technical definitions in the ARF outline.

Next, different selective disclosure schemes are analyzed, including atomic (Q)EAAs schemes, multi-message signature schemes, salted attribute hashes and proofs for arithmetic circuits. The session ends with an in-depth analysis of selective disclosure credential formats and solutions and how they may fit with eIDAS2.

Sebastian Elfors
Senior Architect
In his current role as a Senior Architect at IDnow, Sebastian is a member of CEN TC/224, ETSI ESI, FIDO Alliance, IATA OneID, Linux Foundation, OpenWallet Foundation and W3C, where he has...
eIDAS Certificates, PSD2, FIDO2 Passkeys & Everything at Once: eBay's Identity Journey in a Nutshell

eBay is a global marketplace that empowers hundreds of millions of buyers and sellers in more than 190 markets around the world, trading articles worth around 90 billion dollars every year. We provide new financial services to our sellers, such as keeping funds in the users' accounts for reusing them on eBay to purchase items or to buy shipping labels. In order to secure the accounts of our European sellers and to be compliant with the PSD2 regulation, eBay requires sellers in the EU and UK to use two-factor authentication on our marketplace. This talk describes the journey of eBay offering various two-factor authentications to our millions of users. In particular, eBay was among the first large tech companies offering FIDO2 passkey authentication. We also authenticate access to regulated APIs via eIDAS certificates for licensed third-party providers, as well as protect other sensitive APIs via digital signatures over the payload.

Dr. Ulrich Herberg
Distinguished Architect in Identity
Dr. Ulrich Herberg is a Senior Director of Engineering and Chief Architect of Identity at eBay, leading the company on all topics related to Identity, such as two-factor authentication, IAM, user...
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