Q: I forgot my iPhone backup password. how can i recover it.

When you say iphone backup password are you talking about Apple ID or do you have an itunes backup and have put a code on it...if it's Apple ID you simply need to reset you Apple ID Apple at I forgot.apple.com...if it's itunes backup code unfortunately there's no way around it access for that code

Tips to try & recover the password here:

http://support.apple.com/kb/TS5162