Identity and Access Management (IAM) isn’t just about passwords, tokens, or roles. It’s about control, trust, and risk. And when those three collide, Separation of Duties (SoD) is your most powerful safeguard.
Separation of Duties in IAM means no single person or account has unchecked power. The engineer who deploys code shouldn’t be the same one approving production changes. The finance analyst who issues payments shouldn’t reconcile the ledger. In IAM terms, SoD ensures no identity is given permissions that, when combined, open the door to abuse—accidental or malicious.
Without SoD, toxic permission combinations accumulate invisibly. An admin role here. A write permission there. Soon you have high-risk privilege creep, a perfect attack surface for insiders or compromised accounts. Strong SoD policy stops this before it starts.
Designing SoD for IAM starts with a hard inventory of roles and their assigned permissions. Define high-impact actions. Map them to distinct owners or groups. Then implement these lines in IAM policies, role definitions, and access reviews. Use least privilege as a constant filter—if someone doesn’t need it every day, they shouldn’t have it every day.