Abstract: The disclosure provides techniques for adjusting in-store media according to customer preferences. A customer's presence or purchase is detected at an establishment, and a system at the establishment retrieves information on media preferences of the customer. A media backend then matches the customer preferences to media items (music tracks, images, videos, etc.), and the matching media items are played, displayed, or broadcast at the establishment. If multiple customers are present at the establishment or make orders, the media backend may order media items that match the customers' preferences in first-served order, or based on a ranking of the customers relative to each other or on the content of the media items themselves.

Abstract: An authentication server receives a request for a user-identification code from a computing device. The authentication server generates the user-identification code. The authentication server also generates an expiration date associated with the user-identification code. The authentication server transmits the user-identification code and the expiration date to the computing device. The authentication server also validates the user-identification code received from a code scanning system.

Abstract: Techniques for securely managing user-specific benefits. An authentication server receives a request for a user-identification code from a computing device. The authentication server generates the user-identification code. The authentication server also generates an expiration date associated with the user-identification code. The authentication server transmits the user-identification code and the expiration date to the computing device. The authentication server also validates the user-identification code received from a code scanning system.