All requests made by the Layar SDK need to have a valid OAuth key and secret sent with them in order to successfully pass authentication checks by the Layar server. This information is specific to each app, and must be configured by Layar staff. The key also ensures that only your content is found and displayed in your own application.
The Key is attached to the layar account under which campaigns or vision layers are created. It is also linked to one app published on both Android and iOS platforms. Therefore, you will also need to provide us the specific IDs of your own app for each platform. If you would like to publish another app, you should apply for a new key.
Please NOTE that if you use the same key in multiple iPhone or Android applications, Layar will identify it automatically and invalidate the key immediately.