In Sovrin all identity information is separated into individual Identity attributes, such as birth date, first name, street, pseudonyms, frequent flier numbers, etc.
To access, login to, or prove something, present only the attributes necessary and nothing else, such as “over 21” without sharing your actual birthday.
This optimizes privacy, as those receiving your attributes have no way of correlating them with unshared attributes such as your name.
Attributes have one or more “attestations” attached to prove authenticity, digitally signed by the individual or relevant third parties. (It’s one thing for you to say you have a degree; it’s quite another when the university says so.)