Digital forensics and watermarking : 21st International Workshop IWDW 2022 Guilin China November 18 19 2022 : revised selected papers This book constitutes the refereed proceedings of the 21st International Workshop IWDW 2022 held in Guilin China during November 18 19 2022.The 14 full papers included in this book were carefully reviewed and selected from 30 submissions. They were organized in topical sections as follows: Steganology Forensics and Security Analysis Watermarking