Meshtastic: a node is its key
Dismissed as hikers with walkie-talkies. Read the 2.8 release notes as an identity architecture instead: node IDs derived from public keys, packets signed and no registry to ask because there's nothing there to ask.
identity
An implant has no maintenance window
A pacemaker, a cochlear implant and an insulin pump are embedded computers with firmware, update paths and signing keys. Every assumption this trade makes about patching, rollback and end-of-life was written for machines you can switch off, and none of them survives contact with a device that is inside somebody.
