Generate CDB ID

The Cross-Device Bridge (CDB) technology makes it possible to identify the user anonymously across multiple devices, apps, and websites. Here the CDBEID is used to enable assignment on the domain level. A global cookie ID is read/set by the domain fbc.wcfbc.net for this purpose. This cookie in turn is copied to the customer domain where it remains for the session.

In order to improve accuracy and acceptance, the browser’s image cache is used in addition to the 3rd-party cookie. The Etag header with the same cookie ID is used in order to enable this. Then the CDBEID server dynamically generates an image from this ID, which is read on the client-side and can be subsequently read using the canvas HTML element. Using the image cache is deactivated by default in the pixel.