Identity policy is a set of rules that decides whether a user, device, or session should be trusted enough to get access. These rules usually combine identity signals such as login status, multifactor authentication, device health, location, time, and risk score. In a Zero Trust model, identity policy helps replace broad network access with precise, application-level decisions.
This matters because attackers often abuse valid credentials, stolen sessions, or unmanaged devices. A strong identity policy can block a suspicious login, limit access from an unknown device, or require step-up verification before sensitive apps open. In defense, security teams use identity policy to enforce least privilege, reduce lateral movement, and make access conditional instead of automatic. If the policy is too loose, trust expands beyond what is safe; if it is too strict, users may be locked out unnecessarily. The goal is context-aware access that matches real risk.