This three-volume set LNCS constitutes the proceedings of several Satellite Workshops held in parallel with the 23rd International Conference on Applied Cryptography and Network Security, ACNS 2025, held in Munich, during June 2025.

The 43 full papers and 9 poster papers presented in this volume were carefully reviewed and selected from 87 submissions. They stem from the following workshops:

· · · · · · · · 5th ACNS Workshop on Critical Infrastructure and Manufacturing System Security (CIMSS 2025)