Brief article on the Impact of Artificial Intelligence & Machine Learning on the Security Sector. We review the fundamentals of AI Security before providing a quick review of key sectors. Finally we provide a speculative set of scenarios for 2030, 2050, 2075 & 2100 regarding the possible future evolution of artificial intelligence. This includes a short assessment of the risks that autonomous AI tools bring that could prove to be an existential risk to Human Life, Culture & Society. This year will be 50 years since I started my own PhD into AI - "Stochastic Machine Learning" at Cambridge University Statistical Laboratory which is part of the Department of Mathematics. Enjoy!