This four-volume set LNCS 16053-16056 constitutes the refereed proceedings of the 30th European Symposium on Research in Computer Security, ESORICS 2025, held in Toulouse, France, during September 22–24, 2025.The 100 full papers presented in these proceedings were carefully reviewed and selected from 600 submissions. They were organized in topical sections as follows: AI and Data-Centric Security, Systems and Hardware Security, Privacy, Cryptography and Secure Protocol Design, Blockchain and Financial Security, Privacy Policy and Identity Management, Adversarial and Backdoor Defenses.

This four-volume set LNCS 16053-16056 constitutes the refereed proceedings of the 30th European Symposium on Research in Computer Security, ESORICS 2025, held in Toulouse, France, during September 22–24, 2025.The 100 full papers presented in these proceedings were carefully reviewed and selected from 600 submissions. They were organized in topical sections as follows: AI and Data-Centric Security, Systems and Hardware Security, Privacy, Cryptography and Secure Protocol Design, Blockchain and Financial Security, Privacy Policy and Identity Management, Adversarial and Backdoor Defenses.

This four-volume set LNCS 16053-16056 constitutes the refereed proceedings of the 30th European Symposium on Research in Computer Security, ESORICS 2025, held in Toulouse, France, during September 22–24, 2025.The 100 full papers presented in these proceedings were carefully reviewed and selected from 600 submissions. They were organized in topical sections as follows: AI and Data-Centric Security, Systems and Hardware Security, Privacy, Cryptography and Secure Protocol Design, Blockchain and Financial Security, Privacy Policy and Identity Management, Adversarial and Backdoor Defenses.