All iPod owners who had purchased their device between September 12, 2006, and March 31, 2009, were included in the class action lawsuit, unless they opted out. Around the same time, the main antitrust allegation was changed to cover the belief that Apple had deliberately updated the iTunes software with security patches in a way that prevented synchronization compatibility with competing music stores. In May 2012, the case was changed into a class action lawsuit. In March 2011, Bloomberg reported that Apple's then-CEO Steve Jobs would be required to provide testimony through a deposition. In January 2005, an iTunes customer filed a lawsuit against Apple, alleging that the company broke antitrust laws by using FairPlay with iTunes in a way that purchased music would work only with the company's own music player, the iPod, freezing out competitors. FairPlay allows unlimited music burns to CDs and unlimited music synchronization to iPods, but restricts listening to three Mac computers. Upon attempting to play a file, the master key stored within the file is then matched to the user key, and if successful, allows playing. When a user registers a new computer with iTunes, the device requests authorization from Apple's servers, thereby gaining a user key.

The key required to decrypt the master key is called the 'user key'. The master key required to decrypt the audio layer is also stored in encrypted form in the MP4 container file. The layer is encrypted using the AES algorithm.

4 Steve Jobs' 'Thoughts on Music' open letterįairPlay-protected files are regular MP4 container files with an encrypted AAC audio layer.

3.1 RealNetworks and Harmony technology.

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