问题
Is it possible download a file in an AIR application, store it on the user's system, and prohibit access to the files by applications other than the one with which it was downloaded?
回答1:
Certainly not easily done on Windows. You might have better luck encrypting it's contents.
EDIT: Creating a file not accessible by other programs is very virus-like behavior.
回答2:
Encryption is indeed probably the way to go. AIR does have a handy encrypted local store which should simplify this approach for you:
http://livedocs.adobe.com/flex/3/langref/flash/data/EncryptedLocalStore.html
回答3:
Your best bet is to store the contents of the file in the EncryptedLocalStore or a local shard object. While you can store the downloaded file in a directory on the user's file system, you aren't going to be able to prevent it from being accessed by other applications (or the user) on the system. That's a security issue because that's how a lot of viruses work.
来源：https://stackoverflow.com/questions/998535/file-protection-in-adobe-air-flex