发明名称 |
Protection of audio or video data in a playback device |
摘要 |
Method and apparatus to prevent hacking of encrypted audio or video content during playback. Hackers, using a debugging attachment or other tools, can illicitly access encrypted data in memory in a playback device when the data is decrypted during playback and momentarily stored in digital form. This hacking is defeated here by methodically“poisoning”the encrypted data so that it is no longer playable by a standard decoder. The poisoning involves deliberate alteration of certain bit values. On playback, the player invokes a special secure routine that provides correction of the poisoned bit values, for successful playback. |
申请公布号 |
US8719947(B2) |
申请公布日期 |
2014.05.06 |
申请号 |
US201213554889 |
申请日期 |
2012.07.20 |
申请人 |
LEROUGE JULIEN;FASOLI GIANPAOLO;FARRUGIA AUGUSTIN J.;APPLE INC. |
发明人 |
LEROUGE JULIEN;FASOLI GIANPAOLO;FARRUGIA AUGUSTIN J. |
分类号 |
G06F7/00;H04N7/16;H04N7/167 |
主分类号 |
G06F7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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