Ahh, interesting to read about the technique, thanks for the link. For anyone else curious, here’s a TLDR quote:
In 2021, researchers at Germany’s Technical University of Darmstadt reported that they had devised practical ways to crack what Apple calls the identity hashes used to conceal identities while AirDrop determines if a nearby person is in the contacts of another. One of the researchers’ attack methods relies on rainbow tables.
It’s not a zero day: https://arstechnica.com/security/2024/01/hackers-can-id-unique-apple-airdrop-users-chinese-authorities-claim-to-do-just-that/
Ahh, interesting to read about the technique, thanks for the link. For anyone else curious, here’s a TLDR quote: