Last saturday, SpringCard Prox'N'Roll PC/SC was the core component of the access control and payment system during the annual gala of french high-school École Centrale d'Électronique (ECE) located in Paris. NXP Mifare UltraLight C chips were embedded in the disposable wristbands (featuring the SpringCard logo) that were worn by 3000 attendees.
Starting from SpringCard SDK, ECE students working on the project have written in only a few days a dedicated cashier software (in C# for .NET). A clever use of UltraLight C security capabilities (3-DES authentication) allowed them to make sure that no money could be lost during the event.
The team appears in a short video that aims to promote the concept :