The San Francisco medical examiner's office said Jack, 35, died in the city on Thursday – but did not provide details on the circumstances surrounding his death.
Jack had exposed a security flaw in insulin pumps that could be made to dispense a fatal dose by a hacker 300ft away, pushing some medical companies to review the security of these devices.
He was also a popular and respected figure in the information security scene. Within that small scene, reverse engineers are especially close, said Matthieu Suiche, a friend of Jack's and chief scientist at CloudVolumes Inc in an email. "We pretty much all know each other, or have lots of common friends," Suiche said. "It's almost like we all grew up together."
He added: "There isn't much to say except that Barnaby was one of the rare people in InfoSec who was a brilliant researcher but also a good friend to many of us."
Suiche met Jack at the Black Hat conference a few years ago and said they had been really good friends since. He said he had drinks with Jack and his girlfriend in San Francisco just over a week ago.
He called his friend "brilliant", and said Jack's latest research on medical devices could help save the lives of many people. "In this world full of people fearfully complying and worrying, very few people are crazy enough to challenge the rules, to approach life in an unconventional paradigm and to speak up to contribute to change this world," Suiche said.
source [[ guardian ]]
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