专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20060095495A1 Apparatus for hybrid multiplier in GF(2M) and method thereof 失效
标题翻译： GF（2M）中混合乘法器的装置及其方法
公开(公告)号：US20060095495A1
公开(公告)日：2006-05-04
申请号：US11046340
申请日：2005-01-28
申请人： Yong Choi , Ku Chang , Do Hong , Hyun Cho
发明人： Yong Choi , Ku Chang , Do Hong , Hyun Cho
IPC分类号： G06F7/52
CPC分类号： G06F7/724
摘要： 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.
摘要翻译：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。

2. 发明申请

US20070121948A1 Key establishment method and system using commutative linear function 有权
标题翻译：关键建立方法和系统使用交换线性函数
公开(公告)号：US20070121948A1
公开(公告)日：2007-05-31
申请号：US11449405
申请日：2006-06-08
申请人： Ku Chang , Do Hong , Hyun Cho , Kyo Chung
发明人： Ku Chang , Do Hong , Hyun Cho , Kyo Chung
IPC分类号： H04L9/00
CPC分类号： H04L9/0841
摘要： 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.
摘要翻译：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。

3. 发明申请

US20060098820A1 Method and apparatus for generating keystream 失效
公开(公告)号：US20060098820A1
公开(公告)日：2006-05-11
申请号：US11081681
申请日：2005-03-17
申请人： Ku Young Chang , Mun Kyu Lee , Hang Lee , Do Hong , Ju Kang , Hyun Cho , Kyo Chung
发明人： Ku Young Chang , Mun Kyu Lee , Hang Lee , Do Hong , Ju Kang , Hyun Cho , Kyo Chung
IPC分类号： H04L9/00
CPC分类号： H04L9/0861 , H04L2209/12
摘要： 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.

4. 发明申请

US20070133807A1 Tag authentication apparatus and method for radio frequency identification system 审中-公开
标题翻译：用于射频识别系统的标签认证装置和方法
公开(公告)号：US20070133807A1
公开(公告)日：2007-06-14
申请号：US11607496
申请日：2006-11-30
申请人： Hang Lee , Do Hong , Ho Kim
发明人： Hang Lee , Do Hong , Ho Kim
IPC分类号： H04L9/00
CPC分类号： H04L9/0891 , H04L9/3236 , H04L2209/38 , H04L2209/805
摘要： 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.
摘要翻译：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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式