David Ketler

David Ketler is a cybersecurity consultant based in Toronto, Canada with 10+ years of experience in software development and cybersecurity. He writes about password cracking, dark web activity, and password management.

AI penetration testing protecting LLMs from cyber attacks
AI Penetration Testing: Protecting LLMs From Cyber Attacks
Application Security 20 Apr 2026
88% of organizations now regularly use artificial intelligence (AI) in at least one business function. While adoption of AI technologies has accelerated rapidly, security measures often lag. The rush to roll out AI has, in many cases, overshadowed essential testing…
McKinsey AI hacked
How an AI Agent Hacked McKinsey’s AI Platform
Application Security 16 Mar 2026
On March 9, 2026, CodeWall announced that its artificial intelligence (AI) agent had hacked McKinsey’s internal AI chatbot ‘Lilli’. CodeWall’s autonomous agent was designed to probe systems for weaknesses and had no insider knowledge of McKinsey’s AI platform. Researchers simply…