How to write verifiable credentials in golang

2 min readMar 9, 2021

What is SSI (Self-sovereign identity)?

SSI is a term used to describe the digital movement that recognizes an individual should own and control their identity without the intervening administrative authorities.
SSI allows people to interact in the digital world with the same freedom and capacity for trust as they do in the offline world.

SSI Benefits:

Eliminates the effort of collecting documents that have already been collected
Allows to deliver only the information that is approved to receive
Establish a cryptographically secure distributed ledger recording transactions that prevents modification
No need to store personal data in a central repository
”No one owns, everyone has access”

A qualification, achievement, quality, or aspect of a person’s background, especially when used to indicate their suitability for something.

It may consist of:

Information related to identifying the subject of the credential
Information related to the issuing authority
Information related to the type of credential this is
Information related to specific attributes or properties being asserted by the issuing authority about the subject
Evidence related to how the credential was derived
Information related to constraints on the credential

But also it

Includes digital signatures which makes them more trustworthy
Can generate verifiable presentations that proof the holder holds the credential with the certain information
Could be transmitted rapidly

Note: the code is written following the Verifiable Credentials Data Model 1.0

First, we define a struct of verifiable credential:

then, we add a struct of a presentation:

We will create four methods to create / verify a credential / presentation.

2. Verify a credential:

3. Create a presentation:

4. and finally, verify a presentation: