Centralized identity management: what IAM teams give up and gain

TL;DR: Centralized identity management consolidates authentication, authorization, and provisioning into one control plane, improving visibility and lifecycle handling while creating a single point of failure if poorly implemented, according to StrongDM. The trade-off is operational simplicity versus concentration risk, and that balance matters across human IAM, NHI governance, and adjacent workload access models.

NHIMG editorial — based on content published by StrongDM: Access Centralized and Decentralized Identity Management Explained

By the numbers:

• 90% of IT leaders say properly managing NHIs is essential for a successful zero-trust implementation.
• Only 5.7% of organisations have full visibility into their service accounts.
• 97% of NHIs carry excessive privileges, increasing unauthorised access and broadening the attack surface.

Questions worth separating out

Q: How should security teams decide between centralized and decentralized identity management?

A: Choose the model that best matches your need for visibility, lifecycle control, and operational consistency.

Q: Why does centralized identity management create a single point of failure?

A: Because identity records, policy decisions, and access workflows are concentrated in one repository or control plane.

Q: What should IAM teams check after centralizing access controls?

A: They should confirm that provisioning, role changes, and offboarding actually reach every downstream system that consumes identity data.

Practitioner guidance

• Map every identity source to downstream enforcement points Build a list of all applications, cloud services, and infrastructure systems that consume central identity data, then test whether provisioning and deprovisioning propagate to each one without manual intervention.
• Treat the identity control plane as privileged infrastructure Apply strong admin separation, logging, and recovery controls to the central repository, because compromise there can affect every connected resource and every non-human identity that depends on it.
• Verify leaver actions against live access, not records alone Use access checks to confirm that removed users, service accounts, and tokens are actually blocked in the systems they touched, rather than assuming the central source of truth is enough.

What's in the full article

StrongDM's full blog covers the operational detail this post intentionally leaves for the source:

• Step-by-step explanation of centralized provisioning and deprovisioning workflows across connected systems.
• Practical examples of how a central identity repository changes authentication and authorization handling.
• Detailed comparison of centralized and decentralized identity models in real-world infrastructure.
• Implementation context for teams using StrongDM across cloud accounts, databases, and Kubernetes.

👉 Read StrongDM's guide to centralized and decentralized identity management →

Centralized identity management: what IAM teams give up and gain?

Explore further

View Full Forum →  |  NHI Foundation Course →