This book constitutes the proceedings of the First IFIP TC 9, TC 11 International Cybersecurity Conference, IFIP-UNIVEN-CSIR ICC 2025, held in Tshwane, South Africa, in December 2025. The 17 full papers included in the proceedings were carefully reviewed and selected from 43 submissions. They were organized in topical sections as follows: Security in Emerging and Advanced Technologies (AI/ML and Blockchain); Cybersecurity Governance, Policy, and National Strategies; Cybersecurity Education, Training, and Human Factors; Security Architectures, Models, and Authentication Mechanisms.