Sorry @kira260 I'm under background check, not security, my question was what is the difference between both of them and how I can know if my background check is in security check or normal checkAhhh if this is the case i.e. your application status is going through security/background checks then I would NOT send the CSE after a couple of weeks.
IRCC will take as long as they need to complete your security/background checks by replying on external agencies/third party sources. You cannot speed up this process. And, a CSE will not make a difference