| 摘要 |
<p>The device that legitimately extracts content material from a source is bound to the compliant module that enforces copy protection schemes in the distribution of copy protected material. The extraction device (110) thereafter binds the extracted content material to the compliant module (120) that enforces copy protection. By binding the legitimate extractor (110) to the distribution module (120) that enforces copy protection, other, potentially unauthorized, extractions from other extraction devices, can be distinguished. Because the binding of the legitimate extractor (110) to the distribution module (120) is used to distinguish legitimate extractions, rather than encoding characteristics of the extracted content, such as the presence or absence of a fragile watermark, the legitimate extractor (110) can be configured to provide any encoding, including compressed encodings that minimize bandwidth and memory requirements. The binding of the extraction device (110) to the distribution module (120) can be physical or logical. A physical binding relies on the physical integrity of the system to assure that alternative sources cannot gain access to the distribution module (120). A logical binding relies on cryptographic techniques to assure that only authorized extractors (110) are bound to distribution modules (120).</p> |
