RandallW wrote: ↑Wed Feb 15, 2023 8:41 pm
These are totally issues (I have done security research related to this problem): passive RFID systems (such as on credit cards) have ranges measured in millimeters (which is why the "tap to pay" works--the cards can't be read reliably at a distance) or require high power systems to trigger the encoded "reflection" (which could interfere with medical equipment and ADA assistive technologies) and active systems (such as EZPass or the system used to tr) require the RFID trigger to cause a battery powered system to respond. Assuming those problems were solved in a safe (passive) or convenient (I'd love a ticket the size of an EZPass) system, simply two device of whatever standard in close proximity to each other (like in a wallet together) would cause the reader to mis-read the cards. I suppose that could be fixed by using facial recognition technology to allow the person holding the mis-read cards get stopped by a guard, or having someone standing at each gate to get confirmation of a good read from every person...
It is far more reliable and less expensive to simply have gates that require the ticket holder to tap or scan their ticket or card--that technology is well known and inexpensive.
I agree with you on the last point, but we shouldn't let that keep us from creating a more efficient solution. The issues above aren't insurmountable, certainly, many have been solved at least in part in the loss prevention space. Manual intervention, in the form of guards, conductors walking through the train with a validator, or even "tap at the end of your trip or pay max fare" fill in where the technology doesn't quite reach yet.