Invention Grant
US08336105B2 Method and devices for the control of the usage of content 有权
用于控制内容使用的方法和设备

Method and devices for the control of the usage of content
Abstract:
A method and devices for a control of usage of content is disclosed. In one embodiment, a user device performs the steps of obtaining the content, defining usage rights, generating integrity protection information for defined usage rights, encrypting the content with a content encryption key, encrypting the content encryption key with a key encryption key associated with a recipient device and/or an operator of the recipient device, communicating the encrypted content, the defined usage rights, the encrypted content encryption key, and the integrity protection information to the recipient device. The recipient device performs the steps of verifying the integrity of the defined usage rights based on the integrity protection information, decrypting the encrypted content encryption key with a decryption key corresponding to the key encryption key, decrypting the encrypted content with the content encryption key in a secure environment, applying the defined usage rights to the content in the secure environment, and using the content according to the applied usage rights.
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