Security starts when authentication ends. It's a line I have used a few times over the years as it is one I actually quite believe in. In an era where firewalls are derided as being pretty toothless in the fight against omnipresent complex cyber attacks - and the concept of trusted networks quite rightly become obsolete in the world of "zero trust" - it always seemed odd to me, to put such a large emphasis on stringent authentication services. Clearly authentication is hugely important don't misunderstand, but my point really was that authentication (even with a strong MFA component) becomes less relevant if a) it is not continuous and b) not part of a more holistic approach focused on the access control of services, data and APIs.