1 Executive Summary 5

2 Abbreviations 6

3 References 7

4 5G Enables Smart City 8

4.1 Smart City 8

4.2 Smart City in the 5G Era 8

5 Threats to 5G Smart City 13

5.1 Security Challenges from New Service Applications 13

5.2 Security Challenges from IT-based Networks 14

5.3 Security Challenges from Network Architecture Changes 15

5.4 Security Challenges from Network Capability Openness 16

5.5 Security Challenges from Multi-Access Technologies 16

5.6 Security Challenges from User Privacy Protection 17

6 5G Smart City Security Recommendations 19

6.1 Smart City Architecture 19

6.2 Terminal Layer Security 20

6.3 Network Layer Security 21

6.4 Platform Layer Security 24

6.5 Application Layer Security 25

7 Conclusion 27