How connected systems unintentionally emit metadata, telemetry, and behavioural signals that can be exploited by adversaries and how to balance transparency, insight, and OPSEC. Takeaways: Every action leaves a digital footprint, understanding what’s discoverable is the first step to protecting it. Metadata and behavioural patterns can reveal more than content, especially in aggregate. OPSEC increasingly includes the management of the digital exhaust and erasing the residual digital footprint left behind