IMPLEMENTATION PLAN ...........................................................................30 5 DEFEND........................................................................................................32 5.1. Active Cyber Defence.............................................................................33 5.2. Building a more secure Internet .............................................................35 5.3. Protecting government...........................................................................37 5.4. Protecting our critical national infrastructure and other priority sectors....39 5.5. Changing public and business behaviours ............................................42 5.6. Managing incidents and understanding the threat.................................44 6 DETER ..........................................................................................................46 6.1. Cyber’s role in deterrence ......................................................................47 6.2. Reducing cyber crime ............................................................................47 6.3. Countering hostile foreign actors ...........................................................49 6.4. Preventing terrorism ...............................................................................50 6.5. Enhancing sovereign capabilities – offensive cyber...............................51 6.6. Enhancing sovereign capabilities – cryptography..................................51 7 DEVELOP......................................................................................................54 7.1. Strengthening cyber security skills.........................................................55 7.2. Stimulating growth in the cyber security sector.....................................57 7.3. Promoting cyber security science and technology ................................59 7.4. Effective horizon scanning .....................................................................60 8 INTERNATIONAL ACTION ..........................................................................62 9 METRICS ......................................................................................................66 10 CONCLUSION: Cyber Security beyond 2021 ............................................70 Annex 1: Acronyms .....................................................................................73 Annex 2: Glossary........................................................................................74 Annex 3: Headline implementation programme .......................................78

Select target paragraph3