Introduction
Rotating barcodes look just like regular barcodes but change periodically, typically every minute, and the terminal/reader is programmed to only accept the most recent one. This security measure reduces the risks associated with barcode screenshotting, in particular pass theft or unauthorized pass use. Rotating barcodes can also act as a fallback for devices that can’t take advantage of Smart Tap, due to not supporting NFC (lack of hardware, or software disabled).
NOTE: The Rotating Barcode feature is only available for Google Wallet and only supports QR Code and PDF417 barcode types
Terminology
Rotating Barcodes:
The core concept - barcodes that periodically change their pattern.
Smart Tap:
NFC-based technology for quick access to passes.
NFC (Near-Field Communication):
Short-range wireless technology used for data exchange.
QR Code:
A type of two-dimensional barcode.
PDF417:
Another type of two-dimensional barcode.
Static Barcodes:
Barcodes that remain unchanged.
Dynamic Updates:
The process of the barcode pattern changing regularly.
Pass Theft:
Unauthorized access to events or services using stolen barcode information.
Pass Resale:
Selling passes without authorization, often at inflated prices.
Scalping:
A term for ticket resale, often implying unethical practices.
Google Wallet:
Google's digital wallet app.
How do rotating barcodes work?
Dynamic updates: Unlike static barcodes that remain the same, rotating barcodes refresh their pattern at regular intervals, typically every minute. This means a screenshot of the barcode will become invalid shortly after it's taken.
Enhanced security: This dynamic nature makes it significantly harder for someone to steal or misuse your pass by simply taking a picture of it. Even if someone intercepts the barcode data, it will expire quickly, rendering it useless.
Wider compatibility: For devices without NFC (either lacking hardware or having it disabled), rotating barcodes serve as a backup to Smart Tap.
Think of it like a password that constantly changes. Even if someone gets hold of your old password, it won't grant them access because a new one has already taken its place.
Benefits of using rotating barcodes
Here are some benefits of using rotating barcodes in Google Wallet passes:
Reduced risk of pass theft or misuse: Screenshots of barcodes are a common way for unauthorized access to events or services. Rotating barcodes minimize this risk by making screenshots obsolete.
Added protection against resale: Scalping or unauthorized use of passes becomes more difficult with rotating barcodes, as the original barcode quickly becomes invalid.
Peace of mind for users: Knowing that your passes have an extra layer of security can provide peace of mind and prevent unnecessary worry about potential misuse.
How to enable rotating barcodes
Step 1 - Select Barcode Tab
Navigate to your pass design, and with the Google Design selected click on the barcodes tab.
Step 2 - Enable Rotating Barcode
Use the toggle to enable Rotating Barcodes
Step 3 - Save
Make sure to click 'Save' when done.
For more information regarding scanning and validating rotating barcodes please see HERE
Conclusion
Overall, rotating barcodes are a valuable security feature that Google Wallet offers to enhance the protection and usability of your passes. They add an extra layer of defense against unauthorized access and contribute to a more secure and convenient experience for pass holders.