In this week’s episode of The Security Ledger Podcast (#86) we speak with Dr. Kevin Fu of the University of Michigan about research he conducted that casts doubts on reports of mysterious acoustic attacks on US embassy employees in Havana, Cuba. Also: Chip Block of Evolver talks about the Securities and Exchange Commission’s expanded cyber security guidance. And finally: thousands of radiologic sensors were deployed in the U.S. following the attacks of September 11 2001. We’ll look at new efforts to secure those systems from cyber attack.