Is it possible to prevent a file from being encrypted, or at least being easily decrypted in case of encryption?
For instance; with the Crypto Locker malware attacking users, could you set up a honeypot with a file to somehow reveal the key needed to decrypt the rest of the files?
Or could you construct a file (or pad an existing file), such that encryption is either unfeasible or impossible.
I'm already aware of Known-plaintext attacks, but the article says that ciphers such as AES is not vulnerable to it.
Note: This is not a specific problem I have, merely a fun idea I can't get out of my head.