There is a paper called BlindMy that points out you can have Apple do the attestation using blind signatures over the tag broadcasts, then store the signed mess

There is a paper called BlindMy that points out you can have Apple do the attestation using blind signatures over the tag broadcasts, then store the signed messages on the tag. Requires more RAM but the blind signing protocol actually can be run by a phone, so doesn’t really stress the system. Particularly when the identifier only changes once per day, so only 365 signatures per year. https://petsymposium.org/popets/2023/popets-2023-0006.php https://petsymposium.org/popets/2023/popets-2023-0006.php PS Changing the identifier once per day is very bad for privacy.