This book constitutes the refereed proceedings of the First International Workshop IOSec 2018
sponsored by CIPSEC held in Heraklion Crete Greece in September 2018. The 12 full papers
presented were carefully reviewed and selected from 22 submissions. They were organized in
topical sections named: Critical Infrastructure Cybersecurity Issues CyberSecurity Threats
Assessment and Privacy and Vulnerability and Malware Detection.