All AIR installation files must be digitally signed (http://help.adobe.com/...). Is there a way for an AIR application to access this signature information at runtime?
Say, I'm distributing client-side component of a client-server application, and this client component is implemented using AIR, and I want to prevent* modified copies of the client from accessing the server. Then I could do that by letting the server check the digital signature of the client.
(* of course, this is by no means provides a full guarantee, as it is always possible to re-implement the client-server protocol, but let's consider the simplest case)