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Method of decoding/encoding content file

A content and file technology, applied in the field of encoding/decoding of content files, can solve problems such as time-consuming

Inactive Publication Date: 2008-05-28
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, if figure 2 As shown, when data block C 0 、C 1 、C 2 ,...,C t using their assigned content key K 0 、K 1 、K 2 ,...,K t When encoding / decoding, each chunk of data must be extracted using C 0 、C 1 、C 2 ,...,C t For each content key K 0 、K 1 、K 2 ,...,K t algorithm to perform encoding / decoding, which results in a lot of time spent in encoding / decoding

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  • Method of decoding/encoding content file
  • Method of decoding/encoding content file
  • Method of decoding/encoding content file

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same reference numerals in the figures denote the same parts.

[0037] image 3 is a block diagram of an encoding / decoding module according to an exemplary embodiment of the present invention;

[0038] The encoding / decoding module 100 includes: a content division unit 110 , a combination unit 120 , a group content key generation unit 130 , a block key generation unit 140 , an encoding / decoding unit 150 , and a control unit 160 .

[0039] The content segmentation unit 110 divides the content file into a plurality of data blocks whose coding unit size is m.

[0040] The combining unit 120 groups the divided plurality of data blocks according to the group size n, that is, combines the divided plurality of data blocks into groups according to the group size n.

[0041]The group content key generation unit 130 generates a group content key Kg for each group, a...

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Abstract

A method of decoding / encoding a content file is provided. The method of decoding a content file includes dividing an encoded content file into a plurality of data blocks, grouping the plurality of data blocks into a plurality of groups, generating a group content key for each of the plurality of groups, generating a plurality of block keys for the data blocks in each of the plurality of groups from the group content key generated for each of the plurality of groups, and decoding the plurality of data blocks using the plurality of block keys.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2006-0116070 filed with the Korean Intellectual Property Office on November 22, 2006, which is hereby incorporated by reference in its entirety. technical field [0002] Methods consistent with the present invention relate to encoding / decoding content files, and more specifically, securely and quickly encoding / decoding content on a digital rights management (DRM) system. Background technique [0003] With the widespread spread of the Internet and the advancement of communication technology, various digital contents are generated and processed for distribution. However, unlike analog data, digital content is prone to illegal duplication since it can be copied without loss and easily reused, processed and distributed. [0004] In particular, the digital content distribution environment has been expanding due to integration between networks, integration between devices, and integration between content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/30G06F21/24
CPCH04L9/0836H04L9/08H04L2209/60G06F15/00G06F17/00
Inventor 金明宣朱学树文智瑛徐周希朴美花
Owner SAMSUNG ELECTRONICS CO LTD