iTunes: the right model for copy protection

Last week, Apple released the initial iTunes tracks without DRM copy protection. But what impressed me was that Apple is encoding a digital watermark in the purchased tracks. Thus, an illegally copied track can be traced back to the person who purchased it. This should effectively deter massive piracy such as peer-to-peer file sharing. Assuming that Apple establishes a solid privacy policy, the casual users have little to fear.


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