How a “Dead” iPhone Still Shows Up in Find My
Power it off, or let the battery die — your iPhone keeps whispering over Bluetooth, and strangers’ devices carry that whisper home, sealed so even Apple can’t read it. The microwatt engineering and three-lock cryptography behind Apple’s cleverest protocol, with working demos: a relay-network simulator, live in-browser encryption, and a byte-by-byte tour of the beacon itself.
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