In this episode of the Security Ledger Podcast (#126): Die Hard has finally been embraced as the bloody, violent, feel-good Christmas movie its always been. But the film, which turns 30 this year, is about more than the power of ordinary guys to stand up to evil. Did you know it’s also a (very) early warning about the dire insecurity of building automation systems? We speak with Ang Cui of the firm Red Balloon Security about the dire risk of cyber attacks on building automation software and company’s work to secure this often-overlooked critical infrastructure.