Recently I had created an encrypted password when I back up my phone. But it may be key in wrongly when I create because currently I has no idea to recover my encrypted password.
Do anyone of you facing this kind of issue and has a best solution for me?
Thank you.
The only way use an encrypted backup or turn off backup encryption for your current backup is with the password that was entered when it was set up. The setting is stored on the device itself, so persists even if you delete your current backup set or switch to a new computer. The password might be blank, or any computer, Apple ID, Wi-Fi password or device PIN that you've used in the past, working from the assumption that you might have reused a common password that you were using when you activated encryption. See About encrypted backups in iTunes - Apple Support for details.
If you want to turn off encryption going forward you can either erase and set up as a new device, or backup the current state of the device to iCloud, then subsequently restore from it. Non-iTunes media will need reloading from your computer once the restore is complete. See How to back up your iPhone, iPad, and iPod touch - Apple Support for details. Obviously this approach is only helpful if your device is currently functioning correctly. If you have content on your device that isn't in your library see Recover your iTunes library from your iPod or iOS device. I would also recommend you copy everything out of the camera roll if you haven't already.
tt2
You do get an unlimited number of guesses at the password. But if you give up, the only other workaround I know of is something like creating an iCloud backup, delete the iTunes backup, restore your device as new, create an iTunes backup, restore from the iCloud backup, and finally create an (unencrypted) iTunes backup.
See this thread - Re: i forgit encrypt iphone backup
How to recover encrypted password for backup files if password is forgotten
