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"One attack identified a radio signal that, if re-broadcast, would have switched off a heart defibrillator. [...] "We can influence any [insulin] pump within a 300ft [91m] range," Mr Jack told the BBC. "We can make that pump dispense its entire 300 unit reservoir of insulin and we can do that without requiring its ID number." [...] Prof Fu said the limited battery life of medical devices meant they could not use any authentication or encryption to protect signals passing to and from the device - leaving them open to attack in the future.

"Patients are much better off with these devices than without," said Prof Fu, but added that the work he and others were doing was signalling forthcoming problems that needed to be addressed now."
Many medical implants are vulnerable to attacks that threaten the lives of people kept alive by them, say researchers.