Rotating barcodes change the ticket's barcode on a timer instead of holding one static code from purchase to scan. A screenshot or forwarded image goes stale before it reaches the door, so it no longer works as a way to duplicate or resell a single ticket.

For venues, this closes one of the most common entry-point fraud paths without adding friction for the ticket holder. The barcode still scans normally in the moment it is presented, so your door team keeps the same scan-and-go flow while the underlying code does the work of staying ahead of copies.