As organizations operate hybrid workforces across on‑premises systems, SaaS applications, and multi‑cloud platforms, identity has become the core control plane for Zero Trust security. Modern identity management platforms consolidate users, groups, and service accounts under a single directory, enforce least‑privilege roles, and log every access attempt for audit. Strong authentication practices such as multi‑factor authentication (MFA), adaptive risk‑based policies, and continuous device‑posture checks ensure that access is granted only when risks stay within defined thresholds. Privileged access management (PAM) adds another layer for administrators and third‑party vendors, requiring just‑in‑time elevation and session recording. Identity federation allows seamless single sign‑on across cloud providers and on‑prem apps, reducing credential sprawl and the risk of credential‑based attacks. When combined with Zero Trust Network Access (ZTNA) and continuous authentication signals, identity management turns permissions into an active, context‑aware security layer instead of a static directory.