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    Hybrid broadcast encryption method
    31.
    发明申请
    Hybrid broadcast encryption method 失效
    混合广播加密方式

    公开(公告)号：US20060177067A1

    公开(公告)日：2006-08-10

    申请号：US11346194

    申请日：2006-02-03

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

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

    IPC分类号： H04L9/00

    CPC分类号： H04L9/0822 ,  H04L9/0836 ,  H04L2209/601

    摘要： A hybrid broadcast encryption method is provided. The hybrid broadcast encryption method includes setting initialization values, generating a node secret using the initialization values; generating a private secret using the node secret; sending the node secret and the private secret; generating a broadcast message based on a revoked group; encrypting a session key using a key encryption key (KEK) which is allocated to every user group and the broadcast message; and broadcasting to every user the encrypted session key and the broadcast message.

    摘要翻译： 提供了一种混合广播加密方法。 混合广播加密方法包括设置初始化值，使用初始化值生成节点秘密; 使用节点秘密生成私人秘密; 发送节点秘密和私人秘密; 基于撤销的组生成广播消息; 使用分配给每个用户组的密钥加密密钥（KEK）和广播消息来加密会话密钥; 并向每个用户广播加密的会话密钥和广播消息。

    Combination-based broadcast encryption method
    33.
    发明授权
    Combination-based broadcast encryption method 有权
    基于组合的广播加密方式

    公开(公告)号：US08897445B2

    公开(公告)日：2014-11-25

    申请号：US13460098

    申请日：2012-04-30

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

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

    IPC分类号： H04L9/08 ,  G06F21/10

    CPC分类号： H04L9/0833 ,  G06F21/10 ,  H04L9/0822 ,  H04L2209/601

    摘要： 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.

    摘要翻译： 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 for managing user key for broadcast encryption
    34.
    发明授权
    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：US07752435B2

    公开(公告)日：2010-07-06

    申请号：US11271990

    申请日：2005-11-14

    申请人： Dae-youb Kim ,  Hwan-joon Kim ,  Weon-il Jin ,  Sung-joon Park ,  Dong-hoon Lee ,  Jung-yeon Hwang

    发明人： Dae-youb Kim ,  Hwan-joon Kim ,  Weon-il Jin ,  Sung-joon Park ,  Dong-hoon Lee ,  Jung-yeon Hwang

    IPC分类号： H04L29/06

    CPC分类号： H04L9/3236 ,  H04L9/0891 ,  H04L9/0894 ,  H04L2209/38 ,  H04L2209/603

    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。

    Method for managing user key for broadcast encryption
    35.
    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

    申请人： Dae-youb Kim ,  Hwan-joon Kim ,  Weon-il Jin ,  Sung-joon Park ,  Dong-hoon Lee ,  Jung-yeon Hwang

    发明人： Dae-youb Kim ,  Hwan-joon Kim ,  Weon-il Jin ,  Sung-joon Park ,  Dong-hoon Lee ,  Jung-yeon Hwang

    IPC分类号： H04L9/00

    CPC分类号： H04L9/3236 ,  H04L9/0891 ,  H04L9/0894 ,  H04L2209/38 ,  H04L2209/603

    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
    36.
    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

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

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

    IPC分类号： H04L9/30

    CPC分类号： G06Q20/3829 ,  H04L9/0836 ,  H04L9/0891 ,  H04L2209/601

    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。

    Security device for digital contents and method of using the same
    37.
    发明申请
    Security device for digital contents and method of using the same 审中-公开
    数字内容安全装置及其使用方法

    公开(公告)号：US20070232269A1

    公开(公告)日：2007-10-04

    申请号：US11585865

    申请日：2006-10-25

    申请人： Bae-eun Jung ,  Maeng-hee Sung ,  Weon-il Jin ,  Hee-jean Kim ,  Hwan-joon Kim

    发明人： Bae-eun Jung ,  Maeng-hee Sung ,  Weon-il Jin ,  Hee-jean Kim ,  Hwan-joon Kim

    IPC分类号： H04M1/66

    CPC分类号： H04M1/72522 ,  G06F21/602 ,  H04M1/72558

    摘要： An improved security device for digital contents and a method for using the security device are provided. The improved security device and method include a transmission and reception unit for transmitting and receiving data necessary for authentication with a mobile device, and for transmitting and receiving contents of the mobile device and a controller for performing authentication with the mobile device, and for decrypting re-encrypted contents from the mobile device when the authentication is successful. The improved method and device provide enhance mobility for users.

    摘要翻译： 提供了一种用于数字内容的改进的安全装置和用于使用该安全装置的方法。 改进的安全装置和方法包括用于发送和接收与移动装置进行认证所需的数据的发送和接收单元，以及用于发送和接收移动装置的内容和用于执行与移动装置的认证的控制器，以及用于解密re 当认证成功时，来自移动设备的加密内容。 改进的方法和设备提供增强用户的移动性。

    Security system using RSA algorithm and method thereof
    38.
    发明授权
    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：US07421074B2

    公开(公告)日：2008-09-02

    申请号：US10959993

    申请日：2004-10-08

    申请人： Weon-il Jin ,  Mi-suk Huh ,  Bae-eun Jung ,  Bum-jin Im ,  Kyung-hee Lee

    发明人： Weon-il Jin ,  Mi-suk Huh ,  Bae-eun Jung ,  Bum-jin Im ,  Kyung-hee Lee

    IPC分类号： H04L9/30

    CPC分类号： G06F7/723 ,  G06F2207/7242 ,  H04L9/003 ,  H04L9/302 ,  H04L2209/08

    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。

    Method and apparatus to perform squaring operation in finite field
    39.
    发明申请
    Method and apparatus to perform squaring operation in finite field 失效

    公开(公告)号：US20050021584A1

    公开(公告)日：2005-01-27

    申请号：US10868186

    申请日：2004-06-16

    申请人： Weon-il Jin ,  Mi-suk Huh

    发明人： Weon-il Jin ,  Mi-suk Huh

    IPC分类号： G06F7/544 ,  G06F7/72 ,  G09C1/00 ,  G06F7/00

    CPC分类号： G06F7/724

    摘要： A method and apparatus to square an element A when a defining polynomial of a finite field GF(2n) is expressed as f ⁡ ( x ) = x n + ∑ i = 1 i ⁢   ⁢ x k 1 + 1 , and the element A contained in the finite field is expressed as A−(a0,a1,a2 . . . ,an−1)∈GF(2n). The method determines coefficients mi, Iij, V0, Vij, and V such that the coefficient mi satisfies a predetermined condition with respect to ki when 1≦i≦t is a natural number, Iij depends on n, ki, and j when 2≦j≦mi, V0 and Vij of n bits, respectively, depend on n, Iij, and ki, and obtains the coefficient V with respect to mi according to the following formula V i = ⁢ V i2 ⊕ V i3 ⊕ … ⊕ V im , V = ⁢ V 0 ⊕ ∑ m 1 ≠ 0 ⁢   ⁢ V i determines a coefficient si according to ki and n and cyclically shifts the coefficient V by si; performing an XOR operation on the cyclically shifted coefficient V and the element A; and rewires a result of the XOR operation in a predetermined order and outputs results of the squaring.

    Method and apparatus to perform squaring operation in finite field
    40.
    发明授权
    Method and apparatus to perform squaring operation in finite field 失效

    公开(公告)号：US07543012B2

    公开(公告)日：2009-06-02

    申请号：US10868186

    申请日：2004-06-16

    申请人： Weon-il Jin ,  Mi-suk Huh

    发明人： Weon-il Jin ,  Mi-suk Huh

    IPC分类号： G06F7/00

    CPC分类号： G06F7/724

    摘要： A method and apparatus to square an element A when a defining polynomial of a finite field GF(2n) is expressed as f ⁡ ( x ) = x n + ∑ i = 1 t ⁢ ⁢ x k i + 1 , and the element A contained in the finite field is expressed as A=(a0,a1,a2, . . . ,an−1)∈GF(2n). The method determines coefficients mi, Iij, V0, Vij, and V such that the coefficient mi satisfies a predetermined condition with respect to ki when 1≦i≦t is a natural number, Iij depends on n, ki, and j when 2≦j≦mi, V0 and Vij of n bits, respectively, depend on n, Iij, and ki, and obtains the coefficient V with respect to mi according to the following formula V i = ⁢ V i ⁢ ⁢ 2 ⊕ V i ⁢ ⁢ 3 ⊕ … ⊕ V im i V = ⁢ V 0 ⊕ ∑ m i ≠ 0 ⁢ ⁢ V i determines a coefficient si according to ki and n and cyclically shifts the coefficient V by si; performing an XOR operation on the cyclically shifted coefficient V and the element A; and rewires a result of the XOR operation in a predetermined order and outputs results of the squaring.