Defence / Insights / Security & Threats
Security & Threats

Insider threat: the risk from within

Not every threat comes through the perimeter. The trusted individual with legitimate access is one of the hardest risks to manage.

Organisations invest heavily in keeping threats out, yet some of the most serious incidents come from people already inside: employees, contractors or partners with legitimate access. The insider threat is difficult precisely because it hides inside normal, authorised activity.

Why it is hard

An insider does not need to break in. Their access is expected, their presence unremarkable. Detecting misuse means distinguishing legitimate activity from its abuse, which requires visibility, context and careful governance rather than walls and barriers.

How organisations manage it

  • Least-privilege access, granting only what each role needs
  • Strong identity, audit trails and accountability
  • Monitoring for unusual patterns of access and behaviour
  • Clear procedures for joiners, movers and leavers
  • A culture of security awareness and reporting

Technology and governance together

No single system solves insider risk. It is managed by combining access control, monitoring and auditing with sound policy and culture, which is why security systems and the processes around them must be designed together.

Defence & Specialised Technologies

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