Communications of the ACM
Cryptographic Scheme Could Fix AirTag Stalking
Apple updated its location-tracking system in an attempt to cut down on AirTag abuse while still preserving privacy. Researchers think they’ve found a better balance.
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Researchers from Johns Hopkins University and the University of California, San Diego, developed a cryptographic scheme to prioritize the detection of potential AirTag stalking while maintaining privacy for users.
The first element involves “secret sharing,” which allows the creation of systems that can't reveal anything about a “secret” unless enough separate puzzle pieces present themselves and come together.
In the case of AirTags, the “secret” is the true, static identity of the device underlying the public identifier that is frequently changing for privacy purposes.
The second concept, known as “error correction coding,” is specifically designed to sort signal from noise and preserve the durability of signals.
From Wired
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