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I have to build (obviously using flex) an AIR application that must be linked to a given hardware (i.e. hard-disk), so it can’t be copied elsewhere..
Usually using others languages, every time you open the application, a comparison between HardDisk or CPU ID and the value stored in the application itself…
Using Flex this is not possible (as far as I know)…
User/Password check obviously won’t work..
I can’t use a webservice, the application needs to work offline too..
How could I do?
With AIR you can integrate native apps – either indirectly (start a process and get its result) or directly (as a library).
Any of these techniques allow you to achieve your goal the same way you would in the case you described as “other languages”… BUT BEWARE: this makes your app platform-dependent AND can potentially lead to problems since it is prone to permissions issues etc.
Another point: no such technique is 100% secure (can be circumvented AND can lead to unsatisfied legitimate users!) – so you should really consider whether this is the way to go…