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Security principleBeginner

Separation of Duties

Separation of duties divides sensitive work so one person cannot complete, approve, and conceal a high-risk action alone.

What it means

The control can separate request from approval, development from production release, payment creation from authorization, or investigation from evidence custody. The exact split depends on the risk and available staffing.

Why it matters

Dividing authority reduces fraud, error, abuse, and the chance that one compromised account can complete an entire harmful workflow.

Practical focus

  • Identify transactions where one person has end-to-end power
  • Separate approval from execution where practical
  • Monitor emergency and break-glass exceptions
  • Review conflicting roles after job changes

Common mistakes

  • Creating ceremonial approvals with no real review
  • Ignoring small teams that need compensating controls
  • Allowing emergency access to become normal access

Certification relevance

This subject appears in or supports the following certification bodies of knowledge:

CompTIA Security+ISC2 CCISC2 CISSP

Authoritative sources