TUAW notes that DRM-Free iTunes music still contain your username embedded in their tags.
This "Purchased By" tag can be seen in the Get Info window in iTunes.
I don't think this is that big a deal. I think it's just another tag. you could change it if you wanted to.
arn
I think it is digitally signed, so you can't remove the tag without breaking the signature.
Even if there's a signature, if you broke the signature, what would that prevent you from doing? You should still be able to play the file, as its not encrypted. I don't think any audio players check signatures in meta data to make sure they're correct in order to play it, unless they are trying to comply with a DRM scheme, which is not applicable to the iTunes Plus songs...
It wouldn't be to prevent you (or anyone else) from playing it, but if a certain song showed up on the torrent sites, it could be tracked as to where it originated in the first place.
This data is editable / removable in a hex editor. Removing it does not affect the ability to play the song, even when imported back into iTunes.
If you buy the same song with two accounts, edit that field to be the same, then compare the files, are they the same? I'm guessing they're not. The file signature should be distributed through the data.This data is editable / removable in a hex editor. Removing it does not affect the ability to play the song, even when imported back into iTunes.