Pacemakers, insulin pumps and autonomous gadgets now chat over 5G, but every heartbeat they broadcast is an open invitation to hackers. The warning is clear: when code meets flesh, failures aren’t blue screens—they’re funerals. Regulators finally demand cybersecurity, yet current standards ignore digital evidence. Without immutable, cryptographically signed logs, exploited devices can erase their own fingerprints, leaving victims defenceless. Developers must bake in blockchain‑backed audit trails, tamper‑proof clocks and sensor‑decision‑command logging that survives courtroom scrutiny and legal recourse. Build it lean so life‑saving timing isn’t sacrificed. Log everything, lock it down, or risk turning lifesaving tech into lethal weapons for humans.

This talk is from ENUSEC's Le Tour Du Hack 2025, A student run cyber-security conference (and CTF) based at Edinburgh Napier University. A massive thank you to this years sponsors: Quorum Cyber, Verkada, Bugcrowd, Zerodays CTF, and of course ENU's School of Computing Engineering, and the Built Environment.