Apple's DRM system, called FairPlay, is the most widespread.

苹果的数字版权管理系统叫FairPlay，应用最为广泛。

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That could be because Apple may be using its own DRM system, Fairplay, says DE Jager.

这可能是因为苹果也许打算使用它自己的DRM系统。de Jager认为这是一场公平的游戏。

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And iPod users aren't off the hook either: when playing tracks protected by Apple's FairPlay DRM, CNET found that iPod battery life declined by 8%.

ENGADGET: Is DRM sucking the life out of your MP3 player?

Suspicions seem to be that the FairPlay DRM is at the root, but until we have official word from Apple we'll refrain from laying the blame at its feet.

ENGADGET: Apple aware of corrupt apps issue, working on a fix (Update: Fixed!)

Granted, Google didn't seem to have many options: Apple, by far the dominant player in online digital-media sales, doesn't currently license its Fairplay DRM, and Microsoft is one of Google's biggest competitors.

FORBES: Google Goes Gaga For Video