Digital media content protection method and apparatus

Abstract

The invention discloses a digital media content protection method and an apparatus and relates to the digital media technology field. By using the method, operation efficiency of digital media content protection can be effectively increased. The method comprises the following steps of constructing an authorization structure body, wherein the authorization structure body comprises at least one licensed entity; each licensed entity includes a resource, a resource receiving party, secret key information and a secret key usage rule corresponding to the secret key information; the secret key information comprises general situation information of a secret key at a level and a secret key identification used for encrypting a secret key at a previous level of the secret key at the level; the authorization structure body is used for authorizing the resource to the resource receiving party for usage according to the secret key usage rule in each licensed entity; sending the authorization structure body to a user so that the user uses a client private key to decrypt each level of the secret key of the authorization structure body, and then acquiring a usage authority of the resource. The method and the apparatus are suitable for various kinds of digital media files which need to carry out content protection.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a digital media content protection method and device. Background technique [0002] In order to protect the copyright of digital media, it is usually necessary to encrypt the digital media content with a content key, and then send the content encryption key and the use right information of the media content to the legitimate user in a secure manner. The provision uses a content key to decrypt digital media content. [0003] In the prior art, rights description technology is generally used to control content use rights, where use rights may include operation rights such as preview, play, storage, move, copy, and super-distribution. Generally, the use of each right has corresponding restrictions, for example, preview can only be performed within a certain period of time, or playback can only be performed before a certain deadline. In this way, since the services ordered by...

AI Technical Summary

Problems solved by technology

The wide variety of content usage rights and the different restrictions corresponding to each usage right make the operation process of each license formation very cumbersome

At the same time, the client must also perform cumbersome analysis and processing of these rights and restrictions in order to use digital media content, which is inefficient

Moreover, when a user cancels a subscription to a certain service, the operator also needs to send the user an instruction to cancel the service, which is cumbersome and inefficient.

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