SECURE DISTRIBUTION OF CONTENT USING DECRYPTION KEYS
摘要
<p>For digital rights management (DRM) of e.g. digitally delivered music or video, a technique to make the decryption keys more secure. The technique fragments a message (song or video or other) into a number of portions, and uses a different decryption key for each portion. Each of the various keys is a function of the preceding key, in one version. In another version, each key is a function of a seed value and of the particular portion of the material with which the key is associated.</p>
申请公布号
WO2008136876(A2)
申请公布日期
2008.11.13
申请号
WO2008US00579
申请日期
2008.01.16
申请人
APPLE INC.;FARRUGIA, AUGUSTIN, J.;FASOLI, GIANPAOLO;RIENDEAU, JEAN-FRANCOIS;SCHULTZ, ROD
发明人
FARRUGIA, AUGUSTIN, J.;FASOLI, GIANPAOLO;RIENDEAU, JEAN-FRANCOIS;SCHULTZ, ROD