I was wondering if Spring Boot SSO implementation is based on JWT or keeps the session open in the server memory?
Thanks in advance.
The answer would depend on which Spring implementation you are referring to
I would discuss more on the latter i.e. OAuth and in that you have multiple options. You can use the in-memory token store to debug and test it out, but for production implementations, you can use different token stores. JWT and JDBC are pretty popular in my experience.