User Roles

This section discusses the different types of user role that exist within Trustchain. Throughout the section we will use a concrete example of an individual holding a digital driving license issued by their vehicle driving agency and using this to provide proof of their driving status to a car hire company.

Credential Holder

A credential holder is an entity that possesses verifiable credentials and has the ability to generate verifiable presentations from them.

Example: someone who possesses a digital driving license, where the digital driving license is the verifiable credential and the persons's ability to verifiably presentation this to verifiers such as a car hire company.

Credential Verifier

A credential verifier is an entity that can verify verifiable credentials and presentations.

Example: car hire company receives the digital driving license signed by the holder as a verifiable presenation and the car hire company is able to verify both the signature of the holder and the driving license issuer.

Credential Issuer

DVLA (Vehicle licensing agency)

dDID Subject

Vehicle licensing agency

dDID Issuer

Department for Transport

Root DID Subject

Central govenment

Summary

The following table summarises how the various user roles are supported by the Trustchain software.

Role	Trustchain Mobile	Trustchain using Docker	Trustchain full installation
Credential Holder
Credential Verifier
Credential Issuer
dDID Subject
dDID Issuer
Root DID Subject