The three-volume set LNCS 16231, LNCS 16232, and LNCS 16233 constitutes the refereed proceedings of twelve International Workshops which were held in conjunction with the 30th European Symposium on Research in Computer Security, ESORICS 2025, in Toulouse, France, during September 25-26, 2025. The papers included in these proceedings stem from the following workshops:Part I:·       20th International Workshop on Data Privacy Management, DPM 2025, which accepted 8 regular papers and 6 shorts papers from 27 submissions;·       9th International Workshop on Cryptocurrencies and Blockchain Technology, CBT 2025, which accepted 8 regular papers from 18 submissions;·       11th International Workshop on the Security of Industrial Control Systems and of Cyber-Physical Systems, CyberICPS 2025, which accepted 9 regular papers from 16 submissions;Part II:·       International Workshop on Assessment with New methodologies, Unified Benchmarks, and environments, of Intrusion detection and response Systems, ANUBIS 2025, which accepted 8 regular papers and 1 short papers from 18 submissions;·       3rd International Workshop on Security and Artificial Intelligence, SECAI 2025, which accepted 16 regular papers and 3 shorts papers from 48 submissions;·       4th International Workshop on System Security Assurance, SecAssure 2025, which accepted 6 papers from 11 submissions;·       International Workshop on Secure and Trustworthy Machine Unlearning Systems, STMUS 2025, which accepted 5 regular papers from 15 submissions;Part III:·       2nd International Workshop on Autonomous Cybersecurity, AutonomousCyber 2025, which accepted 7 papers from 24 submissions;·       6th International Workshop on Cyber-Physical Security for Critical Infrastructures Protection, CPS4CIP 2025, which accepted 8 papers from 16 submissions;·       5th International Workshop on Computational Methods for Emerging Problems in Disinformation Analysis, DisA 2025, which accepted 4 papers from 7 submissions;·       International Workshop on Hardware-Supported Software Security, HS3 2025, which accepted 3 regular papers and 4 short papers from 14 submissions;·       International Workshop on Mobile and IoT Security Technologies, MIST 2025, which accepted 8 regular papers from 16 submissions.