Q: forgot iphone backup password

Hi Sunitha c,

Sorry to hear you forgot your iPhone backup password. You may want to try any and all possible passwords.

See About encrypted backups in iTunes - Apple Support

There is no way to recover your information or turn off Encrypt Backup if you lose or forget the password.

and further down…

You can't use an encrypted backup if you don't have the password. If you forgot your password, the only way to turn off backup encryption on your device is to erase your device and set up as new. Erasing removes all data from your device. If you don't want to erase your device, restore from an iCloud backup instead

Take care.