Verifiable credential types explained
Verifiable credentials are not just technical objects — they represent real-world information that can be reused across systems. Each credential is based on a credential type, which defines what kind of information is being shared and how it can be interpreted.
Credential types make digital identity ecosystems understandable and scalable. They allow organizations to issue credentials that are consistent, reusable and interoperable, whether it concerns identity data, diplomas, mandates or certifications.
Within the FIDES Ecosystem Explorer, credential types form the central layer between issuers and relying parties. They determine what is exchanged, how it is used, and how different systems can work together in practice.
What is a credential type?
A credential type defines the structure and meaning of a verifiable credential.
It describes:
- what information is included
- how the data is structured
- how it should be interpreted by verifiers
Examples of credential types include:
- a diploma credential
- a company registration credential
- an employee credential
- a webshop trust credential
Different issuers may issue the same credential type, making it reusable across ecosystems.
Why credential types matter
Credential types are what make verifiable credentials usable beyond a single system. Without clear types:
- credentials cannot be interpreted consistently
- verifiers cannot automate decisions
- interoperability breaks down
With well-defined credential types:
- issuers can align on shared structures
- wallets can store and present them consistently
- relying parties can request and verify them reliably
Credential types are the common language of digital trust.
From schema to real-world use
Credential types are often defined through:
- schemas
- data models
- interoperability profiles
But their real value lies in practical use:
- issued by real organizations
- stored in wallets
- used by applications
FIDES focuses on which credential types are actually used in practice, rather than theoretical definitions.
Credential types and wallets
Wallets do not just store credentials — they interpret credential types. This enables:
- consistent display to users
- selective disclosure of fields
- matching with verifier requests
Both personal and organizational wallets rely on well-defined credential types to function effectively.
Why credential types are central
Credential types determine what can be shared, how it is understood and how systems connect.
They are the bridge between data and use.
In many ways, credential types are the backbone of digital identity ecosystems.