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    Hierarchical threshold tree-based broadcast encryption method
    31.
    发明授权
    Hierarchical threshold tree-based broadcast encryption method 有权
    基于层次阈值树的广播加密方法

    公开(公告)号：US08005225B2

    公开(公告)日：2011-08-23

    申请号：US11340614

    申请日：2006-01-27

    Applicant: Dae-youb Kim ,  Hwan-joon Kim ,  Sung-joon Park ,  Weon-il Jin ,  Dong-hoon Lee

    Inventor： Dae-youb Kim ,  Hwan-joon Kim ,  Sung-joon Park ,  Weon-il Jin ,  Dong-hoon Lee

    IPC: H04L29/00

    CPC classification number: H04L9/0836 ,  H04L9/0822 ,  H04L9/085 ,  H04L2209/601

    Abstract: A hierarchical threshold tree-based broadcast encryption method includes a first step for a server initialization and a user subscription, a second step of distributing a message to enable a privileged user (authorized user) to decrypt a group key, and a third step of the privileged user (authorized user) decrypting the message using the group key. According to the method, it is possible to prevent any group of revocators from obtaining the group key using their secret information and information being broadcast by the server.

    Abstract translation: 基于分层阈值树的广播加密方法包括用于服务器初始化和用户订阅的第一步骤，分发消息以使得特权用户（授权用户）能够解密组密钥的第二步骤，以及第三步骤 特权用户（授权用户）使用组密钥解密消息。 根据该方法，可以防止任何一组撤销者使用其秘密信息和由服务器广播的信息来获得组密钥。

    Protective layer of ink-jet print head and method of making ink-jet print head having the same
    38.
    发明申请
    Protective layer of ink-jet print head and method of making ink-jet print head having the same 审中-公开

    公开(公告)号：US20070285471A1

    公开(公告)日：2007-12-13

    申请号：US11790369

    申请日：2007-04-25

    Applicant: Sung-joon Park ,  O-hyun Beak ,  Young-ung Ha ,  Jae-sik Min

    Inventor： Sung-joon Park ,  O-hyun Beak ,  Young-ung Ha ,  Jae-sik Min

    IPC: B41J2/05

    CPC classification number: B41J2/14129 ,  B41J2202/03

    Abstract: An ink-jet print head and a method of making the same comprising the steps of sequentially laminating a heating layer and an electric conductive layer on a substrate, patterning the electric conductive layer to expose a predetermined area of the top surface of the heating layer, forming a protective layer on the top surfaces of the electric conductive layer and exposed heating layer, and laminating an ink chamber barrier and a nozzle plate on the top surface of the protective layer, thereby forming an ink chamber. The protective layer is provided by forming a cavitation layer by alternately laminating at least two types of thin film layers of different materials over the exposed heating layer and the electric conductive layer to resist fractures and oxidization resulting from use.

    Combination-based broadcast encryption method
    39.
    发明申请
    Combination-based broadcast encryption method 有权
    基于组合的广播加密方式

    公开(公告)号：US20070140483A1

    公开(公告)日：2007-06-21

    申请号：US11311256

    申请日：2005-12-20

    Applicant: Weon-il Jin ,  Dae-youb Kim ,  Hwan-joon Kim ,  Sung-joon Park

    Inventor： Weon-il Jin ,  Dae-youb Kim ,  Hwan-joon Kim ,  Sung-joon Park

    IPC: H04L9/00 ,  G06F12/14 ,  H04L9/32 ,  G06F11/30

    CPC classification number: H04L9/0833 ,  G06F21/10 ,  H04L9/0822 ,  H04L2209/601

    Abstract: A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.

    Abstract translation: 基于组合的广播加密方法包括：由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥，通过使用导出的组密钥加密会话密钥，以及将加密的会话密钥发送给每个用户。 因此，通过组合为每个用户分配不同的基站，从而具有防止串通攻击的安全性。

    Method and apparatus to determine wireless network link
    40.
    发明申请
    Method and apparatus to determine wireless network link 审中-公开
    确定无线网络链路的方法和装置

    公开(公告)号：US20070121563A1

    公开(公告)日：2007-05-31

    申请号：US11583799

    申请日：2006-10-20

    Applicant: Sung-joon Park

    Inventor： Sung-joon Park

    IPC: H04Q7/24

    CPC classification number: H04W48/18 ,  H04W84/12

    Abstract: A method and apparatus to determine a wireless network link includes detecting one or more connectable wireless networks, forming a link to one of the detected wireless networks, determining whether predetermined data is received via the linked wireless network, and determining the linked wireless network as a host-connected network when the predetermined data is received via the linked wireless network. The method is performed by a peripheral and the predetermined data is transmitted by a host via the host-connected network.

    Abstract translation: 一种确定无线网络链路的方法和装置包括检测一个或多个可连接的无线网络，形成到所检测的无线网络之一的链路，确定是否经由所链接的无线网络接收到预定数据，以及将所链接的无线网络确定为 当经由链接的无线网络接收到预定数据时，主机连接的网络。 该方法由外围设备执行，预定数据由主机通过主机连接的网络传输。

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