3 ms·
Wait... is this currently a thing? Does the transit pass keep working after the phone is off? If that's the case then it must really just be keeping a single un
by KingMachiavelli 5y ago
Wait... is this currently a thing? Does the transit pass keep working after the phone is off? If that's the case then it must really just be keeping a single unique identifier available and broadcasting it.
Also the easy fix for such an issue is to just poweroff the phone when it has ~5% of the phone power left which most phones already do. Instead of broadcasting its location, transit ID all the time it could just do it when you hold the power button down or something... it would last longer anyway.
- numpad0 5y agoSupposedly: https://support.apple.com/guide/security/express-cards-with-power-reserve-sec90cd29d1f/web https://support.apple.com/guide/security/express-cards-with-...
- avianlyric 5y agoYeah, the phone hand off the express transit cards crypto keys to the NFC chip used for Apple Pay. Allowing the chip to authorise transactions without the CPU getting involved.