Wallets / Digital identity / Interoperability

From standards
to trust in practice.

A wallet fulfils its purpose when it works with others. Our experts connect standards, cryptography and development to build digital identity journeys that work in practice.

Let’s discuss your project See us in the field

01 / A chain of trust

Four steps. The same commitment to rigour.

Issue.

Design and integrate credential issuance services: an identity, an entitlement or proof of age, with a verifiable origin.

Present.

Connect the wallet to real uses, in person or online. Specify the requested data and make the user journey understandable.

Verify.

Implement readers and verifiers, examine cryptographic proofs and assess the conditions for trust.

Interoperate.

Compare implementations, investigate differences and improve the code through documented testing.

02 / Experts who code

Read the specifications.
Test the implementations.

Protocols serve different purposes: issuance, presentation and verification address distinct needs. We align them with your service architecture, use cases and security requirements.

Our practice spans flow analysis, implementation and cross-testing. Scope, versions and selected profiles must be explicit: a successful test demonstrates a specific scenario and does not, on its own, constitute certification.

OpenID4VCI

Issuing credentials to a wallet.

OpenID4VP

Requesting and presenting credentials.

ISO/IEC 18013-5

Mobile documents and proximity verification.

ISO/IEC TS 18013-7

Remote presentation of mobile documents.

Inside the code: our browser-based mDoc verifier

03 / In the field, with the ecosystem

Trust is also built
around a table.

In Geneva, Nicolas Chalanset and Loïc Perry supported France Identité during a week of international testing and discussions. These meetings give standards a very practical reality.

Members of the digital identity community gathered in Geneva during Global Digital Collaboration 2026. — Global Digital Collaboration · Geneva, 1–3 September 2026. Photograph from Nicolas Chalanset’s post.

Cross-testing, practical results.

The 15th international ISO mdoc and PhotoID interoperability event enabled cross-testing of the France Identité wallet and proximity verifier, alongside our ISO 18013-7 online verifier, with other implementations.

From France Identité to Google Wallet.

The successful import of a France Identité age credential into Google Wallet brought several months of work with the Google Wallet team to fruition, using our OpenID4VCI issuance technology.

Three participants at an international digital identity conference. — Stelau and iDAKTO, connecting with the digital identity ecosystem.

Digital identity tools presented on stage to an audience of professionals. — Demonstrations make protocol exchanges visible and tangible.

Photographs supplied by Stelau.

Google Wallet demonstration screen featuring a France Identité proof-of-age credential. — A France Identité proof-of-age credential on the Google Wallet demonstration in Geneva.

Group photograph of the mDL community with the Fides Collaboration Award in Geneva. — The Fides Collaboration Award recognises the collective work of the ISO/IEC 18013-5 mDL community.

Google Wallet demonstration: photograph from Nicolas Chalanset’s account, reshared by Stelau · Geneva, September 2026. mDL group photograph supplied by Stelau.

Read our Geneva field report

04 / A shared purpose

Open standards. Useful conversations.

Nicolas took part in the first in-person meeting of the OpenID Foundation’s DCHP working group. It works to harmonise credential presentation protocols across the ISO and OpenID ecosystems. These exchanges between engineers and contributors inform our practice.

Explore the DCHP working group

Your next project

A wallet, an issuer, a verifier?

Let’s start with your use cases, stakeholders and required evidence. Then build a clear path from scoping to interoperability testing.

Talk to our experts

From standardsto trust in practice.