Consider a cached access key on a single Windows machine. It got there the way most cached credentials do - a user logged in, and the key stored itself automatically. Standard AWS behavior. No one misconfigured anything or violated a policy. Yet that single key, which was easily accessible to a minor-league attacker, could have opened a path to some 98% of entities in the company's cloud environment - nearly every critical workload the business depended on.
This real-world exposure was caught before an attacker could use it. But the takeaway is clear: identity itself, and every permission it carries, has become the attack path.
Your environment runs on identity. Active Directory, cloud identity providers, service accounts, machine identities, and AI agents - all of these carry permissions that span systems and trust boundaries. A single stolen credential hands the attacker a legitimate identity - along with every permission attached to it.
Despite this, most security programs still treat identity as a perimeter control - something to protect through authentication and access policies. Yet the real risk starts inside the front door. Once an attacker has a foothold, identity is what lets them advance, cross boundaries, and reach critical assets. Because identity is not a perimeter - it's a highway that runs through every layer of your environment.
