Is Apple Playing Fair? Navigating the iPod DRM Controversy
OB Arewa, NF Sharpe · eScholarship (California Digital Library) · 2007
With a few notable exceptions, such as Sony Rootkit software, which was anticopying software installed on certain Sony CDs that also secretly collected security information from computers playing the CD, music content contained on physical CDs has generally not been subject to DRM or other protective measures to prevent copying.