Forgetting my password

Hello parsakhs,

If you encrypted a backup to a computer you cannot restore the backup without the password. You have no option but to delete the backup.

About encrypted backups on your iPhone, iPad, or iPod touch - Apple Support - http://support.apple.com/HT203790

When you entered the backup password if you have a Mac and have Keychain enabled you were given the option of saving the password in Keychain (this is the default). So check Keychain for it.

If you haven’t erased the old phone yet you can create a new backup with a new password—>About encrypted backups on your iPhone, iPad, or iPod touch - Apple Support

If neither of those work you get unlimited guesses, so try to guess what password you might have entered back when. If you are like most people it will be a password that you reused. And to speed up the process click to change the password and you will be prompted immediately.