What is the password Decipher Backup Browser is asking for?

If your backup was made with backup encryption turned on, Decipher Backup Browser will need your backup password to read the backup. The password will be used to read the backup while Decipher Backup Browser runs, but will not stored on your computer in any way.

If you don't remember turning on backup encryption in iTunes, or don't remember what your backup password is, you may find this additional help article helpful!