This book constitutes the proceedings of the satellite workshops held around the 18th International Conference on Applied Cryptography and Network Security, ACNS 2020, in Rome, Italy, in October 2020. The 31 papers presented in this volume were carefully reviewed and selected from 65 submissions. They stem from the following workshops: AIBlock 2020:Second International Workshop on Application Intelligence and Blockchain Security AIHWS 2020:First International Workshop on Artificial Intelligence in Hardware Security AIoTS 2020:Second International Workshop on Artificial Intelligence and Industrial Internet-of-Things Security Cloud S&P 2020:Second International Workshop on Cloud Security and Privacy SCI 2020:First International Workshop on Secure Cryptographic Implementation SecMT 2020:First International Workshop on Security in Mobile Technologies SiMLA 2020: Second International Workshop on Security in Machine Learning and its Applications