The provided text offers a comprehensive overview of Technical Surveillance Countermeasures (TSCM), defining it as a critical counter-intelligence discipline beyond simple "bug sweeping." It details the foundational concepts of TSCM, including its objectives of detection, neutralization, and deterrence, and outlines the broad scope of engagements across physical, RF, and cyber domains. The text explores the modern espionage threat from various actors and the types of surveillance devices used, alongside an in-depth analysis of the multi-layered methodology and core technologies employed in a professional TSCM inspection. Finally, it addresses the strategic implementation of TSCM within a holistic security program and the complex legal and ethical landscape governing the profession, with a specific focus on the Canadian context.

Research done with the help of artificial intelligence, and presented by two AI-generated hosts.