Method for implementing DRM function and additional function using DRM device and system thereof
    61.
    发明申请
    Method for implementing DRM function and additional function using DRM device and system thereof 审中-公开
    使用DRM设备及其系统实现DRM功能和附加功能的方法

    公开(公告)号:US20080195864A1

    公开(公告)日:2008-08-14

    申请号:US11812876

    申请日:2007-06-22

    IPC分类号: H04L9/32 H04L9/12 H04L9/28

    CPC分类号: G06F21/10

    摘要: A digital rights management (DRM) function performing method and system using a DRM device are provided, in which a DRM device connected to a second communication device decodes encoded contents when a first communication device requests to play the contents, the DRM device re-encodes the contents using a session key, and the DRM device transmits the re-encoded contents to the first communication device via the second communication device.

    摘要翻译: 提供了使用DRM设备的数字版权管理(DRM)功能执行方法和系统,其中连接到第二通信设备的DRM设备在第一通信设备请求播放内容时解码编码的内容,DRM设备重新编码 所述内容使用会话密钥,并且所述DRM设备经由所述第二通信设备向所述第一通信设备发送所述重新编码的内容。

    Method and apparatus for successive data processing by information exchange
    63.
    发明申请
    Method and apparatus for successive data processing by information exchange 审中-公开
    通过信息交换连续进行数据处理的方法和装置

    公开(公告)号:US20080148263A1

    公开(公告)日:2008-06-19

    申请号:US11819229

    申请日:2007-06-26

    IPC分类号: G06F9/46

    CPC分类号: G06F9/54 G06F9/485

    摘要: A successive data processing method and apparatus is provided. A data processing apparatus, when connected to a data management apparatus, transmits apparatus information of the data processing apparatus, selects target process data, transmits target process information of the selected target process data, processes the target process data, and transmits process status information according to a process result of the target process data to the data management apparatus.

    摘要翻译: 提供了连续的数据处理方法和装置。 一种数据处理装置,当与数据管理装置连接时,发送数据处理装置的装置信息,选择目标处理数据,发送所选择的目标处理数据的目标处理信息,处理目标处理数据,并根据 涉及到数据管理装置的目标处理数据的处理结果。

    Radio frequency identification (RFID) tag encryption method and system using broadcast encryption (BE) scheme
    64.
    发明申请
    Radio frequency identification (RFID) tag encryption method and system using broadcast encryption (BE) scheme 有权
    射频识别(RFID)标签加密方法和使用广播加密(BE)方案的系统

    公开(公告)号:US20070052523A1

    公开(公告)日:2007-03-08

    申请号:US11511360

    申请日:2006-08-29

    IPC分类号: H04Q5/22

    摘要: A radio frequency identification (RFID) tag encryption method and system using a broadcast encryption (BE) scheme are provided by encrypting an ID of an RFID tag, storing the encrypted ID in a server and the RFID tag, and storing information relating to a reader authorized to read out the RFID tag in the server so that the reader can read out the RFID tag by decrypting the encrypted ID based on the encrypted ID information read from the RFID tag and the reader information. When readers read out ID data from the RFID tag, a privileged reader can read the data. Thus, it is possible to block unintended information leakage to the readers. In addition, user usability can be enhanced since an attacker cannot perform an access lock on the RFID tag.

    摘要翻译: 使用广播加密(BE)方式的射频识别(RFID)标签加密方法和系统通过加密RFID标签的ID,将加密的ID存储在服务器和RFID标签中,并且存储与读取器有关的信息 被授权在服务器中读出RFID标签,以便读取器可以基于从RFID标签读取的加密的ID信息和读取器信息解密加密的ID来读出RFID标签。 当读者从RFID标签读出ID数据时,特权读取器可以读取数据。 因此,有可能将意外的信息泄露给读者。 此外,由于攻击者无法对RFID标签执行访问锁定,因此可以增强用户可用性。

    Method for managing user key for broadcast encryption
    65.
    发明申请
    Method for managing user key for broadcast encryption 失效
    用于管理用于广播加密的用户密钥的方法

    公开(公告)号:US20060107043A1

    公开(公告)日:2006-05-18

    申请号:US11271990

    申请日:2005-11-14

    IPC分类号: H04L9/00

    摘要: A method of managing a user key for a broadcast encryption. The method includes assigning numbers to respective users and arranging the users on a ring-shaped structure in order to map hash chains onto the respective nodes of a ring-shaped structure. The method further includes making random node keys correspond to the respective nodes, one by one, constructing the hash chains from the corresponding node keys using a hash function, and successively mapping the constructed hash chains onto the nodes of the ring-shaped structure.

    摘要翻译: 管理用于广播加密的用户密钥的方法。 该方法包括向各个用户分配号码并将用户排列在环形结构上,以便将散列链映射到环形结构的相应节点上。 该方法还包括使随机节点密钥逐个对应于各个节点,使用散列函数从相应的节点密钥构造散列链,并将构建的散列链连续地映射到环形结构的节点上。

    Apparatus and method for generating a key for broadcast encryption
    66.
    发明申请
    Apparatus and method for generating a key for broadcast encryption 有权
    用于生成用于广播加密的密钥的装置和方法

    公开(公告)号:US20060078110A1

    公开(公告)日:2006-04-13

    申请号:US11245054

    申请日:2005-10-07

    IPC分类号: H04L9/30

    摘要: An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.

    摘要翻译: 一种用于生成用于广播加密的密钥的装置和方法。 该装置包括节点秘密生成器,用于管理以树结构接收广播数据的用户,并为树结构中的每个节点生成唯一的节点秘密。 该装置还包括一个即时密钥生成器,用于临时生成树结构中所有节点共同使用的即时密钥,以及节点密钥生成器,用于通过操作在节点秘密生成器处生成的节点秘密来生成每个节点的节点密钥, 在即时密钥生成器处生成的即时密钥。 因此,可以有效地实现密钥更新。

    Method and apparatus for performing multiplication in finite field GF(2n)
    67.
    发明申请
    Method and apparatus for performing multiplication in finite field GF(2n) 失效
    在有限域GF(2n)中执行乘法的方法和装置

    公开(公告)号:US20050086278A1

    公开(公告)日:2005-04-21

    申请号:US10965907

    申请日:2004-10-18

    IPC分类号: G06F7/52 G06F7/00 G06F7/72

    CPC分类号: G06F7/724

    摘要: A method of obtaining C=(c0, . . . , cn-1) of a product of two elements A and B of a finite field GF(2n). The method includes permuting the last d coefficients (an-1, . . . , an-d) of a multiplier A with predetermined variables (sn-1, . . . , sn-d); operating C:C=⊕(bi+j●A) for (I+j)th coefficient of a multiplicand B to update coefficients of C, where i and j are integers, and A:=(sn-1-j,α0, . . . ,αn-2)⊕(0,sn-1-j●f1, . . . ,sn-1-j●fn-d,0, . . . ,0) repeatedly for j=0 to (d−1) to update coefficients of A, where ⊕ represents an XOR operation and ● represents an AND operation; and repeatedly performing the permuting and operating by increasing i from 0 to (n-1) by d.

    摘要翻译: 获得有限域GF(2')的两个元素A和B的乘积的C =(c n )。 该方法包括用预定的变量(s-n-1)置换乘法器A的最后d个系数(a N 1-n 1,...,a N 2) ,...,s ); 对于被乘数B的(I + j)系数来操作C:C =⊕(b i + j)●A)以更新C的系数,其中i和j 是整数,并且A:=(s-n-1-j,α2,...,αn-2)⊕( 0,...,n-1-j,...,...,...,...,...,...,... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...“ / SUB>,0,...,0)重复j = 0到(d-1)来更新A的系数,其中⊕表示异或运算,●表示AND运算; 并且通过将i从0增加到(n-1)d来重复地执行置换和操作。

    Security system using RSA algorithm and method thereof
    68.
    发明申请
    Security system using RSA algorithm and method thereof 有权
    使用RSA算法的安全系统及其方法

    公开(公告)号:US20050078821A1

    公开(公告)日:2005-04-14

    申请号:US10959993

    申请日:2004-10-08

    摘要: A security system using an RSA algorithm that includes a key input section for receiving a secret key and a public key used in one of encryption and decryption of a message, a random coefficient generating section for generating a random coefficient r having a bit of a predetermined size, a first calculation section for dividing the secret key into a first secret key and a second secret key by using the value of r, and performing an exponentiation of RSA algorithm by using the respective secret keys and the public key, and a second calculation section for performing one of the encryption and the decryption by combining results of exponentiation calculated respectively by using the first and the second secret keys.

    摘要翻译: 一种使用RSA算法的安全系统,包括用于接收秘密密钥的密钥输入部分和用于消息的加密和解密之一的公开密钥;随机系数产生部分,用于生成具有预定 大小,第一计算部分,用于通过使用r的值将秘密密钥分解成第一秘密密钥和第二秘密密钥,并且通过使用相应的密钥和公钥来执行RSA算法的乘幂,以及第二计算 部分,用于通过组合通过使用第一和第二秘密密钥分别计算的求幂的结果来执行加密和解密之一。

    Apparatus and method for generating a key for broadcast encryption
    69.
    发明授权
    Apparatus and method for generating a key for broadcast encryption 有权
    用于生成用于广播加密的密钥的装置和方法

    公开(公告)号:US08755520B2

    公开(公告)日:2014-06-17

    申请号:US13426830

    申请日:2012-03-22

    IPC分类号: H04L9/00

    摘要: An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an instant key generator for temporarily generating an instant key used at all nodes in common in the tree structure, and a node key generator for generating a node key for each node by operating the node secret generated at the node secret generator and the instant key generated at the instant key generator. Thus, key update can be efficiently achieved.

    摘要翻译: 一种用于生成用于广播加密的密钥的装置和方法。 该装置包括节点秘密生成器,用于管理以树结构接收广播数据的用户,并为树结构中的每个节点生成唯一的节点秘密。 该装置还包括一个即时密钥生成器,用于临时生成树结构中所有节点共同使用的即时密钥,以及节点密钥生成器,用于通过操作在节点秘密生成器处生成的节点秘密来生成每个节点的节点密钥, 在即时密钥生成器处生成的即时密钥。 因此,可以有效地实现密钥更新。