Maybe it is time to take a step back and question to what extent it is wise to trust iTunes. Could the encryption not be handled on the device? Then when the PC/Mac is compromised the backup would be still safe.
(Though perhaps it ought not to.)
Maybe it is time to take a step back and question to what extent it is wise to trust iTunes. Could the encryption not be handled on the device? Then when the PC/Mac is compromised the backup would be still safe.