TL;DR: Segregation of duties and separation of duties are often used interchangeably, but the distinction matters because SoD targets conflicting permissions while separation of duties distributes operational responsibility across people and teams, according to SecurEnds. Treating them as one control blurs audit, access, and accountability decisions.
NHIMG editorial — based on content published by SecurEnds: Segregation of duties vs separation of duties in cybersecurity and IAM
Questions worth separating out
Q: How should security teams implement segregation of duties in IAM workflows?
A: Start by mapping the high-risk actions that must never sit in one entitlement path, then enforce those conflicts at role design and provisioning time.
Q: Why do separation of duties controls fail even when policies exist?
A: They fail when the workflow still lets one person influence the full control chain, such as request, approval, and provisioning.
Q: What do organisations get wrong about segregation of duties reviews?
A: They often review titles instead of actual entitlements, so hidden conflicts remain inside roles, inherited permissions, and exception paths.
Practitioner guidance
- Define a formal SoD conflict matrix List the exact permission combinations that are prohibited across finance, IAM, PAM, and admin workflows, then review them whenever roles or applications change.
- Separate request, approval, and provisioning steps Ensure the person requesting access cannot approve it and the approver cannot provision it.
- Automate conflict detection across hybrid systems Use rule-based checks to flag risky access combinations in cloud, SaaS, ERP, and directory systems before they become audit findings.
What's in the full article
SecurEnds's full article covers the operational detail this post intentionally leaves for the source:
- Concrete examples of SoD controls in finance, IAM, HR, and privileged access workflows
- The article's comparison table showing where segregation and separation of duties overlap and diverge
- Compliance mappings across SOX, HIPAA, PCI-DSS, ISO 27001, and NIST
- Implementation guidance for automating conflict detection in hybrid environments
👉 Read SecurEnds's guide to segregation of duties vs separation of duties →
Segregation of duties vs separation of duties: what IAM teams miss?
Explore further
SoD is an entitlement problem, while separation of duties is a governance design problem. The article is correct that many organisations use the terms interchangeably, but IAM teams should not. SoD answers whether a single identity can accumulate conflicting permissions, while separation of duties asks whether a critical process is split across independent functions. Practitioners should map both controls separately or they will overstate coverage and under-detect privilege abuse.
A few things that frame the scale:
- 1 in 4 organisations are already investing in dedicated NHI security capabilities, with an additional 60% planning to do so within the next twelve months, according to The State of Non-Human Identity Security.
- Only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, according to The State of Non-Human Identity Security.
A question worth separating out:
Q: Who is accountable when a user can both request and approve privileged access?
A: Accountability sits with the governance owner, because the control design allowed one identity to influence both decision and execution. In mature programmes, this is treated as a separation-of-duties failure and often an SoD violation as well. The fix is not a reminder, but a workflow that prevents the overlap.
👉 Read our full editorial: Segregation of duties vs separation of duties in IAM governance