UK government classification marking for sensitive information requiring protection but not fully classified.
Official-Sensitive is a handling caveat within the Official classification, indicating information requiring additional protection beyond routine Official material. Official-Sensitive information could cause moderate damage if compromised. Most government and defence work involves Official or Official-Sensitive information, not higher classifications. Handling requirements include need-to-know access, secure storage, and controlled sharing. Official-Sensitive doesn't require security clearance but does require appropriate handling.
Why It Matters
The DSC Perspective:
Much defence work involves Official-Sensitive rather than classified information. Understand the handling requirements—they're less stringent than classified but still require appropriate controls and awareness.