When a copy-protected CD hit No. 1 on the U.S. music sales charts last month, it marked a breakthrough for the antipiracy technology in all but one sense: The music still wouldn't play on Apple's iPod. Now the two companies responsible for most copy-protected CDs are scrambling to create new versions of their technologies that are compatible with Apple's popular digital music player. In the process, they're both making substantial changes in the way CDs are digitally locked, changes that could ultimately be a setback to recent Microsoft strides into the music business.
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