Identity as the New Perimeter
The observation that the network boundary dissolved — cloud, remote work, BYOD — so trust now gets decided per request based on identity, device, and behavior instead of network location.
This reframing is what Zero Trust formalizes into a discipline: never trust, always verify, with the identity-plus-device pair as the actual unit of an access decision, replacing the old assumption that anything inside the office network could be trusted by default.