In the perimeter-based security model, identity was an afterthought — once you were inside the network, you were largely trusted. In the zero-trust model, identity is everything. Every access request must be authenticated, authorized, and continuously validated, regardless of network location. This shift makes identity and access management the most critical security domain for modern enterprises.
The Identity Pillars
A mature IAM program addresses four identity domains: workforce identity (employees and contractors), customer identity (CIAM), machine identity (service accounts, APIs, IoT devices), and privileged identity (administrators and privileged users). Each domain has distinct requirements and risk profiles, requiring different tooling and governance approaches.