Cyber Security Matters Podcast | 17-11-2025 Join us for a fascinating conversation with Alex Lisle, CTO of Reality Defender, who brings 25 years of cybersecurity innovation to the fight against deepfakes and synthetic media manipulation.
We explore how Reality Defender’s multi-modal approach is protecting enterprises, governments, and high-profile individuals from increasingly sophisticated synthetic media attacks.
Alex provides eye-opening examples of real-world deepfake attacks, including multi-million pound fraud schemes and nation-state disinformation campaigns, whilst offering practical insights on building effective defences.
Key Topics Discussed:
- The evolution from early internet hacking to modern cyber defence
- Reality Defender’s multi-modal approach to deepfake detection
- Real-world examples of deepfake attacks and their impact
- The importance of content provenance and authenticity • Building vs buying security solutions in emerging threat landscapes • AI’s limitations and biases in security decision-making
- The future of synthetic media and content verification
Chapters:
00:00 Introduction and Guest Welcome
00:55 Alex Lyle’s Journey into Cybersecurity
04:38 The Evolution of Technology and Hacking
10:25 The Role of Curiosity and Problem-Solving in Cybersecurity
27:04 Navigating the Startup World vs. Multinational Corporations
27:53 The Rise of AI Manipulation and Deepfakes
31:14 Practical Implications and Real-World Examples
47:45 Future of AI: Creation vs. Detection
About Our Guest:
Alex Lisle servs as CTO at Reality Defender, where he leads the technical strategy for detecting and preventing deepfake attacks. With over 25 years in cybersecurity, :
Company: https://www.realitydefender.com
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