Secure ICU Devices Keep Up With Quantum Threats

A new system called HybridTrust lets old and new medical devices work together safely while the world shifts to quantum‑safe security. It focuses on large, power‑available ICU monitors instead of small wearables, so it can use stronger encryption without worrying about battery life. HybridTrust does not invent a new machine‑learning trick; it builds on TinyML and adds smart crypto tools. A special negotiation step picks the best encryption that both devices can handle, choosing between traditional ECC, a quantum‑safe scheme called ML‑KEM‑512, or a mix of both. The framework also packs its security certificates into just 931 bytes so tiny microcontrollers can store them.It keeps track of how each encryption choice matches rules from HIPAA, GDPR, FDA, and NIST, giving users a clear compliance score. When many hospitals share data, the system merges their models using a tree‑based method that works even when patient data differ across sites. Tests on simulated ICU data from five hospitals showed a 90. 5 % accuracy in spotting problems, with only a few tenths of a millisecond added for quantum‑safe encryption. Overall, HybridTrust shows that critical‑care devices can stay secure and work together during the slow move to quantum‑resistant cryptography, without slowing down patient monitoring.