Barcode/QR Solution for events

Hi,

We need a barcoding solution for Dynamics 2013. Ideally this is what we would like:

1. Contact books onto an event through our web form (work already in place)

2. Contact is sent an auto - email through a workflow (can easily produce)

3. Barcode / QR code reference number is saved in the CRM (ie, unique identifier for this code)

4. Email contains a Barcode and QR code as well as booking details (can easily produce this)

This is to enable contacts to bring their barcode / QR code to our events and we will then scan these using barcode / QR scanners. We can upload this info and match it to the unique identifier against the contact and we will know the contact has attended.

Happy to consider other options, but think point 3 is the only part we are missing.

Am sure others must have come across the need for this.

Thanks

Matt