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Content dividing method, device and system

A technology for content and key content, applied in the field of communication systems, can solve problems such as increasing implementation costs, complicating content distribution schemes, increasing network transmission volume, etc., to achieve the effects of improving performance, reducing impact, and improving transmission efficiency

Inactive Publication Date: 2007-12-26
INT BUSINESS MASCH CORP
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This combined unified session key / private key solution may prevent illegal clients from obtaining content distributed to other clients after maliciously attacking a legitimate client, and in the case of multiple clients sharing the same content It only needs to encrypt the content once, but the exchange of a large number of keys (client public key, public group key and partial key) in this scheme will increase the network transmission volume, complicate the content distribution scheme, and increase the implementation cost

Method used

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  • Content dividing method, device and system
  • Content dividing method, device and system
  • Content dividing method, device and system

Examples

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Embodiment Construction

[0042] Various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] FIG. 1 is a flowchart of a method for distributing content to multiple recipients according to one embodiment of the present invention.

[0044] As shown in FIG. 1, after the process starts, at step 102, content to be distributed is acquired.

[0045] The content to be distributed is, for example, the specific information of a service provided, which may include various forms such as video, audio, data, or multimedia. In the following embodiments, common video content is used as the content to be distributed. However, the specific form of the content to be distributed does not limit the present invention.

[0046] In step 104, key content and non-key content in the content to be distributed are determined.

[0047] The following introduces the principle of distinguishing key content from non-key content. Key content is generally cont...

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Abstract

This method includes: (1) obtaining the contents to be dispatched; (2) distinguishing among them the key content (KC) and the normal content (NC); (3) sending KC to all receiving sides (RS) via the special protecting format of each RS; (4) sending NC to all RS. This invention also discloses a device to dispatch contents to several RSs. This device consists of (1) an obtaining apparatus to obtain the contents to be dispatched, (2) a distinguishing apparatus to distinguish KC and NC, (3) a KC sending apparatus to send KC to all RS via the special protecting format of each RS and (4) a NC sending apparatus to send NC to all RS. This invention reduces effectively the influence of safety on the whole system when the user end is viciously attacked. This device can flexibly adjust the translation bandwidth.

Description

technical field [0001] The present invention generally relates to the field of communication systems, and more particularly to a method and apparatus for distributing content to multiple recipients, a method and apparatus for receiving content, and a content distribution system. Background technique [0002] In conventional multicast and broadcast content distribution supporting conditional access (CA) or digital rights management (DRM), all legitimate clients (recipients) who subscribe to the content can get the same protected content. The protection of the content is to ensure the confidentiality of the content during transmission, so as to prevent clients who have not subscribed to the content from obtaining the content illegally. [0003] The content protection measure usually adopted in the prior art is to use the common key known by each client to encrypt the content in the server (sender) that distributes the content, so that each client can only use the common key to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04N7/1675H04N21/6408H04N21/6405H04N21/23476
Inventor 党亚斌邵凌冯博阎蓉
Owner INT BUSINESS MASCH CORP
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