It might be nice if you can create a Offline App that can be used to import private keys for paper wallets. Imagine if you can encrypt the private key before you use it and when you go online to import it.. then it quickly decrypt it before you import it. (It does not give the hacker the time to capture and use it, before you use it) 

Many people have malware / Clipboard hacks etc... that collect private keys, when you paste it in text ... and if the hacker is fast enough, he or she can exploit that.... but if the private key are encrypted "offline" and then decrypted just before you use it online to import, it will help you to prevent that exploit.

Good luck with "Crosspass"... once you can get the source code independently verified and you received a "green" light for the trust aspect, then things will change for you.