This book constitutes the refereed proceedings of the 6th International Conference on Mobile Internet Security, MobiSec 2022, held in Jeju, South Korea, in December 15–17, 2022. The 24 full papers included in this book were carefully reviewed and selected from 60 submissions. They were organized in topical sections as follows: ​5G advanced and 6G security; AI for security; cryptography and data security; cyber security; and IoT application and blockchain security.

This book constitutes the refereed proceedings of the 5th International Symposium on Mobile Internet Security, MobiSec 2021, held in Jeju Island, Republic of Korea, in October 2021. The 28 revised full papers presented were carefully reviewed and selected from 66 submissions. The papers are organized in the topical sections: IoT and cyber security; blockchain security; digital forensic and malware analysis; 5G virtual Infrastructure, cryptography and network security.