Big data and security : 4th International Conference ICBDS 2022 Xiamen China December 8 12 2022 proceedings This book constitutes the refereed proceedings of the 4th International Conference on Big Data and Security ICBDS 2022 held in Xiamen China during December 8 12 2022. The 51 full papers and 3 short papers included in this book were carefully reviewed and selected from 211 submissions. They were organized in topical sections as follows: answer set programming; big data and new method; intelligence and machine learning security; data technology and network security; sybersecurity and privacy; IoT security