I have such sentence "Create a session based authentication", and I think that correct way to spell it, is like this: "Create a session-based authentication".
Am I right? I have followed answer for this question as a rule: correct use of hyphens to connect two words.
You are absolutely right. This hyphen is often left out in error. I work as an editor for a sports blog, and this is a correction I have to make very often.
In addition to the thread that you linked, this is a good overview of when to use the hyphen. For more threads like it, you can google "compound adjective hyphen."
