Invention Grant
US08082592B2 Read/write encrypted media and method of playing 失效
读/写加密媒体和播放方法

Read/write encrypted media and method of playing
Abstract:
A new media device including a decryption device that is operable to create a decryption key to read media. The decryption device is itself a read/write device that allows reducing or decrementing each time the decryption key is used.
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