公开(公告)号：KR1020090115565A

公开(公告)日：2009-11-05

申请号：KR1020080041484

申请日：2008-05-02

Applicant: 삼성전자주식회사

Inventor： 이선남 ,  이충훈 ,  윤영선 ,  주학수 ,  김진목

IPC: H04L9/08 ,  H04L12/28

CPC classification number: H04L9/0836 ,  H04L9/0891 ,  H04L2209/601

Abstract: PURPOSE: A method for transmitting a content key and an apparatus therefore is provided to transmit a content key by using discard information and a key block smaller than a conventional device. CONSTITUTION: In a method for transmitting a content key and an apparatus therefore, an identifiers, whole number, discard information of a discard node groups are generated(510). The identifiers of discard node groups are composed of only a node which is deposed in a layer structure. A single discard nodes is composed of the discard node which is not included in the discard node group. The discard information includes the identifiers of single discard nodes. A content is encrypted by an encryption key combination and encrypted content key combination is generated(520). An encryption key combination is not generation since the decryption key combination is used.

Abstract translation: 目的：提供一种用于发送内容密钥的方法和装置，用于通过使用比常规设备更小的丢弃信息和密钥块来发送内容密钥。 构成：在用于发送内容密钥和装置的方法中，生成丢弃节点组的标识符，整数，丢弃信息（510）。 丢弃节点组的标识符仅由层结构中的节点组成。 单个丢弃节点由不包括在丢弃节点组中的丢弃节点组成。 丢弃信息包括单个丢弃节点的标识符。 通过加密密钥组合加密内容，并生成加密的内容密钥组合（520）。 由于使用解密密钥组合，所以不会生成加密密钥组合。

公开(公告)号：KR1020080084481A

公开(公告)日：2008-09-19

申请号：KR1020070026290

申请日：2007-03-16

Applicant: 삼성전자주식회사

Inventor： 문지영 ,  김명선 ,  주학수

IPC: H04L9/32

CPC classification number: H04W12/08 ,  H04L63/0435 ,  H04L63/10 ,  H04L2463/101 ,  H04W12/02

Abstract: A method and a system for transmitting contents between devices are provided to improve the security and correctness in an updating process of license information by performing a contents transmission determination at the host device. A system for transmitting contents between devices includes a memory unit(110), an interface(120), a control unit(140), a processor(130), and an encryption unit(150). The memory unit stores encrypted contents and license information. The interface transmits the license information corresponding to the encrypted contents to an external device in a connection state with the external device. The control unit transmits the encrypted contents to the external device if a transmission request of the encrypted contents is received from the external device. The processor performs the update of the license information. The encryption unit encrypts the license information with a sharing key generated by an authentication key exchange method with the external device.

Abstract translation: 提供一种用于在设备之间传送内容的方法和系统，以通过在主机设备执行内容传输确定来提高许可信息更新过程中的安全性和正确性。 一种用于在设备之间传送内容的系统包括存储单元（110），接口（120），控制单元（140），处理器（130）和加密单元（150）。 存储单元存储加密的内容和许可信息。 接口将与加密内容对应的许可信息发送到与外部设备的连接状态的外部设备。 如果从外部设备接收到加密内容的发送请求，则控制单元将加密内容发送到外部设备。 处理器执行许可证信息的更新。 加密单元利用与外部设备的认证密钥交换方法生成的共享密钥来加密许可证信息。

公开(公告)号：KR1020080046515A

公开(公告)日：2008-05-27

申请号：KR1020060116070

申请日：2006-11-22

Applicant: 삼성전자주식회사

Inventor： 김명선 ,  주학수 ,  문지영 ,  서주희 ,  박미화

IPC: G06F15/00 ,  G06F17/00

CPC classification number: H04L9/0836 ,  H04L2209/60

Abstract: A method for encoding and decoding a content file is provided to strengthen security and increase encoding/decoding speed in a DRM(Digital Rights Management) system by encoding and decoding a DRM content file after dividing the DRM content file into a plurality of data blocks. An encoded content file is divided into a plurality of data blocks(S10). The data blocks are grouped into a plurality of groups according to preset group sizes(S20). A plurality of group content keys corresponding to the groups are generated(S30). A plurality of data block keys for the data blocks included in the groups are generated by inputting the group content keys into a hash function(S40). The data blocks are decoded by using the block keys(S50).

Abstract translation: 提供了一种用于对内容文件进行编码和解码的方法，以通过在将DRM内容文件分割成多个数据块之后对DRM内容文件进行编码和解码来加强DRM（数字版权管理）系统中的安全性并提高编码/解码速度。 编码内容文件被分成多个数据块（S10）。 数据块根据预设组尺寸被分组成多个组（S20）。 生成与组对应的多个组内容密钥（S30）。 通过将组内容密钥输入到散列函数来生成用于组中包括的数据块的多个数据块密钥（S40）。 通过使用块键对数据块进行解码（S50）。

公开(公告)号：KR1020080021424A

公开(公告)日：2008-03-07

申请号：KR1020060084828

申请日：2006-09-04

Applicant: 삼성전자주식회사

Inventor： 이충훈 ,  주학수 ,  김치헌

IPC: G06F17/00

CPC classification number: G06F21/10

Abstract: A method for decoding contents with a DRM(Digital Rights Management) card is provided to enable a user to use various contents irrespective of a DRM system set to the contents by installing various kinds of DRM software in the DRM card, prevent hacking by upgrading the DRM software conveniently, and realize mass production and reduce a manufacturing cost by installing no DRM software to a host device. A DRM card(100) storing various kinds of DRM software receives encoded contents from a host device(200) and permits a contents decoding request. The DRM card decodes the contents by executing the DRM software corresponding to contents information. The DRM card transmits the decoded contents to the host device. The DRM card deletes the old version DRM software and requests the host device to transfer the new version DRM software when the stored DRM software is an old version. The DRM card requests the host device to transfer the corresponding DRM software when the DRM software corresponding to the contents information is not stored. The DRM card stores the DRM software received from the host device and decodes the contents by executing the stored DRM software.

Abstract translation: 提供了一种利用DRM（数字版权管理）卡对内容进行解码的方法，以使用户能够通过在DRM卡中安装各种DRM软件来使用各种内容，而不管DRM系统设置为内容，通过升级 DRM软件方便，通过不向主机设备安装DRM软件实现批量生产并降低制造成本。 存储各种DRM软件的DRM卡（100）从主机设备（200）接收编码内容，并允许内容解码请求。 DRM卡通过执行对应于内容信息的DRM软件对内容进行解码。 DRM卡将解码的内容发送到主机设备。 当存储的DRM软件是旧版本时，DRM卡删除旧版本DRM软件并请求主机设备传送新版DRM软件。 当DRM内容信息对应的DRM软件未被存储时，DRM卡请求主机传送对应的DRM软件。 DRM卡存储从主机设备接收到的DRM软件，并通过执行存储的DRM软件对内容进行解码。

公开(公告)号：KR1020080019863A

公开(公告)日：2008-03-05

申请号：KR1020060082314

申请日：2006-08-29

Applicant: 삼성전자주식회사

Inventor： 주학수 ,  이충훈 ,  김치헌

IPC: G06F17/00 ,  G06F21/24

CPC classification number: G06F21/16 ,  H04L9/0825

Abstract: A method and a device for inserting asymmetrical codes into contents are provided to prevent illegal contents distribution and repudiation of illegal activity of illegal distributors by inserting the asymmetrical code into the contents. An encryptor(202) provides a plurality of algorithms including a data encoding algorithm and an electronic signature verifying algorithm. An interpreter(204) inserts a fingerprint including user information into the contents and encrypts the contents including the fingerprint based on the algorithm provided from the encoder. An asymmetrical code inserter(206) inserts an encrypted watermark into encrypted fingerprint data. The encrypted watermark is extracted from a card issued from a trust authority. The card includes an electronic signature of the encrypted watermark, a public key of a user, and the electronic signature of a public user key. The interpreter verifies the electronic signature of the encrypted watermark and the public user key and performs a permutation operation for the encrypted watermark based on the algorithm provided from the encryptor.

Abstract translation: 提供了一种将非对称代码插入到内容中的方法和装置，用于通过将非对称代码插入到内容中来防止非法分发者的非法活动的非法内容分发和否定。 加密器（202）提供包括数据编码算法和电子签名验证算法的多种算法。 解释器（204）将包含用户信息的指纹插入到内容中，并且基于从编码器提供的算法对包含指纹的内容进行加密。 不对称代码插入器（206）将加密的水印插入加密的指纹数据。 从从信托机构发行的卡中提取加密的水印。 卡包括加密水印的电子签名，用户的公开密钥以及公共用户密钥的电子签名。 解密器验证加密水印和公共用户密钥的电子签名，并且基于从加密器提供的算法对加密水印执行置换操作。