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A Philips Sonicare Brush Head Is a Password-Protected NFC Chip That Locks Itself Forever After Three Wrong Guesses

  • Chris Pirillo--Lockergnome.com
  • published date: 2026-11-14 00:00:00 UTC

Cyrill Künzi, an electrical engineer in Zurich, sniffed the handle's radio chatter in 2023 and found a plain-text password and a timer counting seconds of use.

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