Quote:
Originally Posted by seventwenty
If they want more security, why not use a QR code that the pass checkers can scan to check validity?
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Oh hey, I know this.
Based on
this FAQ page (specifically the question
Why does it take up to 72 hours for transactions to be updated in the system?), RTD's on-bus electronic beepers don't have immediate network access while out and about, so scanning a QR code or some such would be able to determine whether or not the pass was valid for the day, but not able to invalidate the code after use until the bus pulled into the garage.