New iPods exclusively locked to iTunes
Apple has locked out other digital content management software by adding ?SHA1 hashes? to the beginning of the iTunesDB file, the database file which keeps track of digital content stored on the iPods. The enhanced code locks the iTunes database to one specific iPod and also prevents any modifications to it. If an attempt is made to either change the database file to a different iPod or to modify the file, the iPod reports ?0 songs? are stored on the device. What this means is that essentially only iTunes can add or delete content from the iPod.