Scientists prevent deadly pacemaker hijack

A 'cloaking' device that stops computer hackers maliciously hijacking pacemakers' radio signals could save lives, say scientists.
Earlier this year a team of U.S. scientists using a radio signal were able to simulate interference with the devices and claimed that, in theory, hijackers could shut them down or deliver potentially lethal electric shocks to millions of heart patients.
Now a computer scientist has devised a cloaking device that is designed to resist any instructions that come from anyone other than the doctor.
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