Security classifications

Everyone working in Defence needs to know how to classify and mark information correctly.

How to classify information

• What we use in Defence
• Understand OFFICIAL, SECRET and TOP SECRET
• Classifying large amounts of data

How to mark information

• How to mark OFFICIAL information
• Use OFFICIAL-SENSITIVE correctly
• How to mark SECRET and TOP SECRET information

Publishing content online

• Working in the open in Defence
• Keep information secure and people safe
• What you must not publish online