公开(公告)号：US20060098820A1

公开(公告)日：2006-05-11

申请号：US11081681

申请日：2005-03-17

Applicant: Ku Young Chang ,  Mun Kyu Lee ,  Hang Lee ,  Do Hong ,  Ju Kang ,  Hyun Cho ,  Kyo Chung

Inventor： Ku Young Chang ,  Mun Kyu Lee ,  Hang Lee ,  Do Hong ,  Ju Kang ,  Hyun Cho ,  Kyo Chung

IPC: H04L9/00

CPC classification number: H04L9/0861 ,  H04L2209/12

Abstract: A method and apparatus for generating a keystream are provided. The method includes: (a) receiving a bitstream comprised of at least 4 bits; (b) selecting at least two bits from the received bitstream; (c) generating an operation value by performing a predetermined bitwise operation on the bits selected in (b); and (d) determining whether to discard the received bitstream or to output the rest of the received bitstream not selected in (b) according to the operation value. The method and apparatus for generating a keystream are expected to be suitable for a ubiquitous computing and network environment and to provide high security or high efficiency.

公开(公告)号：US20060095495A1

公开(公告)日：2006-05-04

申请号：US11046340

申请日：2005-01-28

Applicant: Yong Choi ,  Ku Chang ,  Do Hong ,  Hyun Cho

Inventor： Yong Choi ,  Ku Chang ,  Do Hong ,  Hyun Cho

IPC: G06F7/52

CPC classification number: G06F7/724

Abstract: An apparatus and method for hybrid multiplication in GF(2m) by which trade-off between the area and the operation speed of an apparatus for a hybrid multiplier in finite field GF(2m) can be achieved are provided. The apparatus for hybrid multiplication includes: a matrix Z generation unit generating [m×k] matrix Z for performing a partial multiplication of a(x) and b(x), by dividing b(x) by k bits (k≦┌m/2┐), when multiplication of m-bit multiplier a(x) and m-bit multiplicand b(x) is performed from [(m+k−1)×k] coefficient matrix of a(x) in GF(2m); a partial multiplication unit performing the partial multiplication ┌m/k┐k−1 times in units of rows of the matrix Z to calculate an (┌m/k┐k−1)-th partial multiplication value and a final result value of the multiplication; and a reduction unit receiving the (┌m/k┐k−1)-th partial multiplication value fed back from the partial multiplication unit and performing reduction of the value in order to obtain a partial multiplication value next to the (┌m/k┐k−1 )-th partial multiplication value.

Abstract translation: 一种用于在GF（2MM）中的混合乘法的装置和方法，通过该方法在有限域GF（2）中的混合乘法器的装置的面积和操作速度之间进行权衡， / SUP>）可以实现。 用于混合乘法的装置包括：通过将b（x）除以k位（k <=┌m/ m）来生成用于执行a（x）和b（x）的部分相乘的[mxk]矩阵Z的矩阵Z生成单元 2）中，当从GF（2 m ）; 部分乘法单元以矩阵Z的行为单位执行部分乘法┌m/k┐k-1次，以计算（┌m/k┐k-1）个部分乘法值和最终结果值 乘法; 以及缩小单元，接收从部分乘法单元反馈的（┌m/k┐k-1）个部分相乘值，并执行该值的减少，以获得与（┌m/ k ┐k-1）部分乘法值。

公开(公告)号：US20070121948A1

公开(公告)日：2007-05-31

申请号：US11449405

申请日：2006-06-08

Applicant: Ku Chang ,  Do Hong ,  Hyun Cho ,  Kyo Chung

Inventor： Ku Chang ,  Do Hong ,  Hyun Cho ,  Kyo Chung

IPC: H04L9/00

CPC classification number: H04L9/0841

Abstract: Provided are a key establishment method and system using commutative linear functions. In the method, a server defines a set of linear functions that use elements of a first finite field as coefficients and satisfy a commutative rule, selects a first linear function from the set, and selects a predetermined element from a second finite field. Next, the server selects a second linear function corresponding to each of nodes from the set, generates a predetermined combination function based on the first and second linear functions, generates a value of the second linear function using the selected element as a factor, and transmits the combination function and the value of the second linear function to a corresponding node. Each node receives the value of the second linear function from a server, exchanges the received values with the other nodes, computes a value using the exchanged value as a factor of the combination function, and establishes the computed value as a shared key between the nodes. Therefore, each node can perform key establishment with a small amount of computation and low memory consumption, while guaranteeing end-to-end security.

Abstract translation: 提供了一种使用交换线性函数的关键建立方法和系统。 在该方法中，服务器定义一组线性函数，其使用第一有限域的元素作为系数并满足可交换规则，从集合中选择第一线性函数，并从第二有限域中选择预定元素。 接下来，服务器从集合中选择与每个节点对应的第二线性函数，基于第一和第二线性函数生成预定的组合函数，使用所选元素作为因子生成第二线性函数的值，并且发送 组合函数和第二个线性函数的值对应一个节点。 每个节点从服务器接收第二线性函数的值，与其他节点交换接收的值，使用交换的值作为组合函数的因子计算值，并将计算值建立为节点之间的共享密钥 。 因此，每个节点可以执行少量计算和低内存消耗的密钥建立，同时保证端到端的安全性。

公开(公告)号：US20080222681A1

公开(公告)日：2008-09-11

申请号：US11719272

申请日：2005-04-08

Applicant: Do-Hong Kwon

Inventor： Do-Hong Kwon

IPC: G06F13/00

CPC classification number: H04N5/775 ,  H04N5/782 ,  H04N21/4147

Abstract: The invention relates to a method for recording multiple programs in a digital broadcasting receiver. The digital broadcasting receive, when receiving a record command for multiple programs in the broadcast signal currently incoming, confirms and stores PID's of each of the programs corresponding to the record command. Thereafter, the digital broadcasting receiver searches the broadcast data for the PID's so as to store broadcast data by matching PID values. According to the present invention, the method for recording multiple programs is advantageous in that a broadcasting receiver may be implemented so as to simultaneously record multiple programs.

Abstract translation: 本发明涉及一种用于在数字广播接收机中记录多个节目的方法。 数字广播当接收到当前进入的广播信号中的多个节目的记录命令时，确认并存储与记录命令对应的每个节目的PID。 此后，数字广播接收机搜索PID的广播数据，以便通过匹配PID值来存储广播数据。 根据本发明，用于记录多个节目的方法的优点在于可以实现广播接收机以便同时记录多个节目。

公开(公告)号：US20080186995A1

公开(公告)日：2008-08-07

申请号：US12015055

申请日：2008-01-16

Applicant: Do-Hong KWON

Inventor： Do-Hong KWON

IPC: H04J3/26

CPC classification number: H04H20/63 ,  H04N21/2143 ,  H04N21/2221 ,  H04N21/235 ,  H04N21/2362 ,  H04N21/2381 ,  H04N21/435 ,  H04N21/6125 ,  H04N21/6405 ,  H04N21/64322

Abstract: The present invention relates to MDU broadcasting signal distribution system, and more specifically, to MDU system that receives a broadcasting signal through a single broadcasting receiving antenna in a multiplex house or building where an IP network is provided, and then transmits the broadcasting signal to each MDU set-top box through the IP network. According to the invention, when an IP network is provided in a multiplex house or building, without installing a dish-shaped antenna or cable, the set-top box is connected to the IP network so as to receive satellite broadcasting, terrestrial DMB, and cable broadcasting. Therefore, broadcasting signals can be effectively distributed to each home such that desired broadcasting can be enjoyed in the home. Further, by applying IGMP, broadcasting can be selectively provided to an MDU set-top box belonging to a specific group.

Abstract translation: 本发明涉及MDU广播信号分配系统，更具体地说，涉及通过在提供IP网络的多路复用室或建筑物中的单个广播接收天线接收广播信号的MDU系统，然后将广播信号发送到每个 MDU机顶盒通过IP网络。 根据本发明，当在多路复用房屋或建筑物中提供IP网络而不安装碟形天线或电缆时，机顶盒连接到IP网络，以便接收卫星广播，陆地DMB和 有线广播。 因此，可以将广播信号有效地分配到每个家庭，使得可以在家中享受所需的广播。 此外，通过应用IGMP，可以向属于特定组的MDU机顶盒选择性地提供广播。

公开(公告)号：US20070133807A1

公开(公告)日：2007-06-14

申请号：US11607496

申请日：2006-11-30

Applicant: Hang Lee ,  Do Hong ,  Ho Kim

Inventor： Hang Lee ,  Do Hong ,  Ho Kim

IPC: H04L9/00

CPC classification number: H04L9/0891 ,  H04L9/3236 ,  H04L2209/38 ,  H04L2209/805

Abstract: A radio frequency identification (RFID) tag authentication apparatus and method for accomplishing quick authentication and solving privacy problems using a hash algorithm are provided. An RFID tag includes a memory unit storing a tag's secret information and a group's secret information and a hash chain computation unit encrypting secret information based on a hash algorithm. The tag authentication apparatus includes a DB storing information about RFID tags, which is classified into groups and includes each group's secret information and each tag's secret information; a group's secret information search unit finding a group to which a tag to be authenticated belongs; and a tag's secret information search unit searching tags' secret information included in the found group.

Abstract translation: 提供了使用散列算法实现快速认证和解决隐私问题的射频识别（RFID）标签认证装置和方法。 RFID标签包括存储标签的秘密信息和组的秘密信息的存储单元以及基于散列算法加密秘密信息的散列链计算单元。 标签认证装置包括存储关于RFID标签的信息的数据库，其被分类为组，并且包括每个组的秘密信息和每个标签的秘密信息; 查找要认证的标签属于的组的组的秘密信息搜索单元; 以及标签的秘密信息搜索单元，搜索包括在所找到的组中的标签的秘密信息。

公开(公告)号：US07387808B2

公开(公告)日：2008-06-17

申请号：US10204768

申请日：2001-02-26

Applicant: Yong-Gil Ha ,  Hee-Do Hong ,  Bu-Yong Lee ,  Sung-Soo Kim ,  Kyung-Tack Kim

Inventor： Yong-Gil Ha ,  Hee-Do Hong ,  Bu-Yong Lee ,  Sung-Soo Kim ,  Kyung-Tack Kim

IPC: A23L1/22

CPC classification number: C12J1/08 ,  A23L27/14

Abstract: The invention relates to process for preparing persimmon vinegar, in which persimmon extract is added to persimmon concentrate to obtain a mixture and then the mixture is spray dried; and vinegar powder having a taste and a smell convenient to eat, produced by the process. The persimmon vinegar powder is prepared by concentrating persimmon vinegar to 12˜18° BX using vacuum concentrator to obtain a concentrate of persimmon vinegar; adding 15˜30 weight % of extract of persimmon leaf and 5˜9 weight % of cyclodextrin, based on the weight of the concentrate, to the concentrate to obtain a solution and then stirring the solution; dissolving 1˜5 weight % of lactose, 25˜35 weight % of maltodextrin, and 5˜9 weight % of gum, based on weight of the concentrate, in the stirred solution and homogenizing the solution: and spray drying the homogenized solution to obtain a powder. According to the present invention, a sour taste of persimmon vinegar is eliminated and a characteristic flavor of persimmon leaf is added, which lead to prepare persimmon vinegar powder having improved preference, and also prepare standard and economical persimmon vinegar powder by use of the concentrate. The method may prepare vinegar powders from vinegar, which is made from numerous fruits and vegetables such as grape, apricot, plum, garlic, etc. In some cases, Chineses matrimony vine, Maximowiczia chinensis and pine needle may be added.

Abstract translation: 本发明涉及制备柿子醋的方法，其中将柿子提取物加入到柿子浓缩物中以获得混合物，然后将混合物喷雾干燥; 和具有方便食用的味道和味道的醋粉，由该方法生产。 通过浓缩柿子醋至12〜18°BX使用真空浓缩机制备柿子醋，得到柿子醋浓缩物; 加入15〜30重量％的柿子提取物和5〜9重量％的环糊精，基于浓缩物的重量，得到溶液，然后搅拌溶液; 在搅拌溶液中溶解1〜5重量％的乳糖，25〜35重量％的麦芽糖糊精和5〜9重量％的胶，并将该均匀溶液喷雾干燥，得到 一粉 根据本发明，消除了柿子醋的酸味，并且加入了柿子的特征风味，从而制备出优选的柿子醋粉，并且通过使用浓缩物制备了标准和经济的柿子醋粉。 该方法可以从醋，如葡萄，杏，李子，大蒜等大量的水果和蔬菜制成醋粉。在某些情况下，可以加入中华人民共和国中华藤蔓，马尾松和松针。