[cusspvz]

I have synced with the computer before, but I needed some disk space a while ago and deleted everthing related with the iTunes. So, do you think those keys were backed up on my computer?

[tmikaeld]

Probably - If you had deleted the user folder then I would have assumed it was permanently gone.

[cusspvz]

I've deleted iTunes assets on "~/Library/Application Support" and "~/Music/iTunes". Also, before doing that I've deleted all the backups I had on "iTunes > Preferences > Devices".

It would be awesome if there was someone out there who could test this. :)