Method and apparatus for generating keystream
    1.
    发明授权
    Method and apparatus for generating keystream 失效
    用于产生密钥流的方法和装置

    公开(公告)号:US07587046B2

    公开(公告)日:2009-09-08

    申请号:US11081681

    申请日:2005-03-17

    IPC分类号: H04L9/00 G06F7/58

    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.

    摘要翻译: 提供了一种用于产生密钥流的方法和装置。 该方法包括:(a)接收由至少4位组成的比特流; (b)从所接收的比特流中选择至少两个比特; (c)通过对(b)中选择的比特执行预定的逐位运算来产生操作值; 以及(d)根据操作值确定丢弃所接收的比特流还是输出未在(b)中选择的接收的比特流的其余部分。 预期用于生成密钥流的方法和装置适用于普遍存在的计算和网络环境并提供高安全性或高效率。

    Key establishment method and system using commutative linear function
    2.
    发明授权
    Key establishment method and system using commutative linear function 有权
    关键建立方法和系统使用交换线性函数

    公开(公告)号:US07715556B2

    公开(公告)日:2010-05-11

    申请号:US11449405

    申请日:2006-06-08

    IPC分类号: G06F21/20

    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对应于每个节点的第二线性函数,基于第一和第二线性函数生成预定的组合函数,使用所选择的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。

    Apparatus for hybrid multiplier in GF(2m) and method thereof
    3.
    发明授权
    Apparatus for hybrid multiplier in GF(2m) and method thereof 失效
    GF(2m)中混合乘法器的装置及其方法

    公开(公告)号:US07599979B2

    公开(公告)日:2009-10-06

    申请号:US11046340

    申请日:2005-01-28

    IPC分类号: G06F7/72

    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: 提供了一种用于在GF(2m)中的混合乘法的装置和方法,通过该方法可以实现有限域GF(2m)中用于混合乘法器的装置的区域和操作速度之间的权衡。 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 在GF(2m)中的(x)的[(m + k-1)×k]系数矩阵中执行m比特乘法器a(x)和m比特被乘数b(x)的乘法时, 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。

    Ring authentication method for concurrency environment
    5.
    发明授权
    Ring authentication method for concurrency environment 有权
    并发环境的环认证方法

    公开(公告)号:US07975142B2

    公开(公告)日:2011-07-05

    申请号:US11932916

    申请日:2007-10-31

    IPC分类号: H04L9/32

    摘要: A ring authentication method for a concurrency environment, the method capable of providing unforgeability, sender anonymity, and deniability in the concurrency environment, in which, when a receiver receiving a message requests a sender of the message to certify the message, the sender requested to certify the message sends a message certification value certifying that the sender is one of a plurality of users {P1, . . . , Pn} and authenticates the message m to the receiver, and the receiver verifies the sent message certification value and authenticates that the message is sent from the one of the plurality of users {P1, . . . , Pn}.

    摘要翻译: 一种用于并发环境的环形认证方法,该方法能够在并发环境中提供不可伪造性,发送者匿名性和可否认性,其中当接收到消息的接收者请求消息的发送方认证消息时,发送方请求 证明消息发送消息认证值,证明发送方是多个用户之一{P1,...。 。 。 ,Pn}并且向接收者认证消息m,并且接收者验证所发送的消息认证值,并认​​证该消息是从多个用户{P1,...之一发送的。 。 。 ,Pn}。

    REMOTE FORENSICS SYSTEM BASED ON NETWORK
    6.
    发明申请
    REMOTE FORENSICS SYSTEM BASED ON NETWORK 审中-公开
    基于网络的远程威胁系统

    公开(公告)号:US20110153748A1

    公开(公告)日:2011-06-23

    申请号:US12971177

    申请日:2010-12-17

    IPC分类号: G06F15/16

    CPC分类号: H04L67/125

    摘要: A remote forensics system based on a network is provided to allow for accessing a forensics analysis center from a remote area to perform forensic analysis. The network-based remote forensic system includes: one or more remote terminals performing forensic analysis on an evidence device in a remote area, through a virtual forensic tool when the evidence device is connected thereto; and an investigation center system connected to the remote terminals via a wide area network to provide the virtual forensic tool, processing a requirement of the remote terminals, and providing requirement processing results to the remote terminals.

    摘要翻译: 提供基于网络的远程取证系统,以便从远程区域访问取证分析中心进行法医分析。 基于网络的远程取证系统包括:一个或多个远程终端,当证据设备连接到其上时,通过虚拟取证工具对远程区域的证据设备执行取证分析; 以及通过广域网连接到远程终端的调查中心系统,以提供虚拟取证工具,处理远程终端的需求,并向远程终端提供需求处理结果。

    RING AUTHENTICATION METHOD FOR CONCURRENCY ENVIRONMENT
    7.
    发明申请
    RING AUTHENTICATION METHOD FOR CONCURRENCY ENVIRONMENT 有权
    环境环境认证方法

    公开(公告)号:US20080133917A1

    公开(公告)日:2008-06-05

    申请号:US11932916

    申请日:2007-10-31

    IPC分类号: H04L9/32

    摘要: A ring authentication method for a concurrency environment, the method capable of providing unforgeability, sender anonymity, and deniability in the concurrency environment, in which, when a receiver receiving a message requests a sender of the message to certify the message, the sender requested to certify the message sends a message certification value certifying that the sender is one of a plurality of users {P1, . . . , Pn} and authenticates the message m to the receiver, and the receiver verifies the sent message certification value and authenticates that the message is sent from the one of the plurality of users {P1, . . . , Pn}.

    摘要翻译: 一种用于并发环境的环形认证方法,该方法能够在并发环境中提供不可伪造性,发送者匿名性和可否认性,其中当接收到消息的接收者请求消息的发送方认证消息时,发送方请求 证明消息发送消息认证值,证明发送方是多个用户之一{P <1> 。 。 。 ,并且将消息m认证给接收者,并且接收机验证所发送的消息认证值,并且认证该消息是从多个用户之一发送的(P 1) ,。 。 。 ,P&lt; n&gt;}。

    Method for data analysis and digital forensics and system using the same
    9.
    发明授权
    Method for data analysis and digital forensics and system using the same 有权
    数据分析和数字取证方法及使用方法

    公开(公告)号:US08639683B2

    公开(公告)日:2014-01-28

    申请号:US13282078

    申请日:2011-10-26

    IPC分类号: G06F7/00 G06F17/30

    CPC分类号: G06F17/30864

    摘要: A system and method for data analysis and digital forensics is provided. The system for data analysis and digital forensics may include: an online data forensic server for collecting and analyzing usage history information from an object device, which is subject to data collection, downloading and collecting data on the Internet based on the usage history information, requesting issuance of a timestamp token for the collected data, and receiving the issued timestamp token; a timestamp token issuing server for issuing the timestamp token for the collected data in response to the request for issuance of the timestamp token and proving the issued timestamp token to the online data forensic server; and a storage device for storing the collected data.

    摘要翻译: 提供了一种用于数据分析和数字取证的系统和方法。 用于数据分析和数字取证的系统可以包括:在线数据取证服务器,用于从对象设备收集和分析使用历史信息,所述对象设备需要根据使用历史信息进行数据收集,下载和收集数据,请求 发出用于收集的数据的时间戳令牌,以及接收所发出的时间戳令牌; 时间戳令牌发行服务器,用于响应于发出时间标记令牌的请求发布收集的数据的时间戳令牌,并向在线数据取证服务器证明发出的时间戳令牌; 以及用于存储所收集的数据的存储装置。