Trust Flow Diagrams
A Shared Repository for the Swiss Trust Infrastructure
What is the Trust Flow Diagram Repository?
Trust flows are flow diagrams of use cases in the Swiss Trust Infrastructure. They map the actors, process steps, decisions and data exchanges involved in implementing verifiable credentials – making complex interactions legible for everyone at the table. What we call a trust flow is more than a technical diagram: it is a shared language for understanding how trust is established, delegated and verified across organisations and sectors.
This repository is a first iteration towards a more transparent ecosystem. As tooling matures, trust flows will form the foundation for ecosystem discovery – enabling any organisation to understand what credentials exist, who the relevant actors are, what governance applies, and how to connect. That future is not yet here, but these diagrams are how we start building towards it.
What
- Flow diagrams covering data, processes, actors, flows and patterns
- Creates common understanding of components and interactions
- Supports design, implementation and delivery of trust flows
Why
- Make transparent what needs to get done
- Illustrate where costs and benefits lie
- Identify dependencies on other actors
- Encourage dialog and make ideas concrete
For Whom
- Delivery and project managers
- Business analysts and architects
- Decision makers in organisations
- Anyone explaining the Swiss Trust Infrastructure
Added Value Through Coordination
By building a shared repository instead of fragmented individual solutions, the Trust Flow Working Group enables the entire ecosystem to move faster and more securely.
Solve concrete problems collaboratively across organisations
Develop common standards for interfaces and protocols
Clear identification of dependencies between actors
Faster time to market and better scalability
Reduced risks and lower implementation costs
Identify new areas for research and certification
How We Collaborate
Each Trust Flow diagram goes through a structured collaboration process – from initial idea to published artefact.
Find a group of interested people
Bring together domain experts, technical architects and business stakeholders for the use case.
Draft the flow on a Miro board
Collaboratively sketch actors, data flows and process steps in a shared visual workspace.
Review with the target group
Validate the draft with relevant stakeholders – issuers, verifiers, wallet providers and others.
Transfer to LikeC4 / Mermaid
Convert the validated diagram into a structured, machine-readable format for versioning and reuse.
Publish on the DIDAS repository
Make the diagram openly available for the entire ecosystem to build on.
Maturity Levels
2 Draft on Miro
3 Reviewed round passed
4 Published on DIDAS repo
5 Confirmed implementation
Example Flows
Below are live examples from the working group. Each diagram documents a real use case being developed in collaboration with sector participants – showing the actors, decision points, data flows, and interfaces needed to implement verifiable credentials.
Education: University Onboarding
A collaboration between DIDAS, Educa, Switch, Sapio and others. The flow covers the end-to-end journey of a student enrolling at a Swiss university using the E-ID and swiyu wallet.
Actor Overview
Step 1 – Create eduID account
Step 2 – Immatriculation
Banking
Banking flows developed in collaboration with the OpenBankingProject.ch community – covering branch walk-in identification and online re-identification, both using the swiyu wallet and E-ID Trust Infrastructure.
Branch Walk-in Identification
Online Re-Identification – Sequence Diagram
Flows in Progress
The working group is actively developing flows across multiple sectors. Every arrow between components belonging to different actors is an external dependency that requires a well-defined interface – standardising these is the foundation for national and international interoperability.
Education
- in progress High school diploma issuance
- in progress University onboarding
- in progress Enrollment for further education
- in progress Document issuance further education
Banking
- in progress Branch walk-in identification
- in progress Online re-identification
- in progress KYC credential
Real Estate
- ideation Renting an apartment
Health
- ideation Vaccination journey
- ideation Your idea!
Working Group Leads
Dr. Nora Sleumer
Vice President, Swiss Informatics Society
Co-Head WG Trust Flows, DIDAS
Dr. Axel Schild
Innovation Developer e-ID, Adnovum
Co-Head WG Trust Flows, DIDAS
Join the Journey
Help shape the repository of Trust Flow Diagrams for the Swiss Trust Infrastructure. Contribute your use case, join the working group, or reach out to collaborate.