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    • 51. 发明授权
    • Group admission system and server and client therefor
    • 集体录取系统及服务器及客户端
    • US07949703B2
    • 2011-05-24
    • US10751964
    • 2004-01-07
    • Natsume MatsuzakiToshihisa NakanoYuichi Futa
    • Natsume MatsuzakiToshihisa NakanoYuichi Futa
    • G06F15/16
    • H04L29/06G06F21/10G06F2209/505G06F2221/0706H04L67/1002H04L67/1008H04L67/101H04L67/1021H04L67/125H04L67/2814
    • Disclosed is a group admission system having a client and a server that belongs to a closed group within which contents are available. The client determines whether it is permissible to request to join the group to be a member device thereof based on the number of groups that the client is in and the maximum number of groups that the client is permitted to be in. If permissible, the client transmits a registration request to the server with information unique to the client. The server determines whether to permit the client to join the group by registering with the server based on the number of member devices registered with the server and the maximum number of member devices registerable with the server. If it is permitted, the server registers the unique information, and transmits group identification information to the client. The client receives and stores the group identification information.
    • 公开了具有客户端和属于内容可用的封闭组的服务器的组准许系统。 客户端根据客户端所在的组数和允许客户端的最大组数确定是否允许请求加入组成为其成员设备。如果允许,客户端 使用客户端唯一的信息向服务器发送注册请求。 服务器根据登录服务器的成员设备号和服务器可登录的成员设备的最大数量,确定是否允许客户端通过向服务器注册来加入组。 如果允许,则服务器注册唯一信息,并将组标识信息发送给客户端。 客户端接收并存储组标识信息。
    • 52. 发明授权
    • Information security device and elliptic curve operating device
    • 信息安全装置和椭圆曲线操作装置
    • US07940927B2
    • 2011-05-10
    • US11912112
    • 2006-04-25
    • Yuichi FutaNatsume Matsuzaki
    • Yuichi FutaNatsume Matsuzaki
    • H04K1/00H04L9/28G06F7/58
    • G06F7/725G06F2207/7261H04L9/003H04L9/3066H04L9/3252H04L2209/12H04L2209/56H04L2209/60
    • Resistance against simple power analysis is maintained while a smaller table is used. An IC card 100 decrypts encrypted information using elliptic curve calculation for calculating a point k*C by multiplying a point C on an elliptic curve E with a coefficient k that is a positive integer less that a prime p. The calculation of the point k*C is performed by adding a multiplication result obtained by multiplying a digit position (window) value w of the acquired coefficient k with the point C in a position corresponding to the digit position, and is performed with respect to all digit positions. When a non-negative integer t exists that fulfills a condition that the acquired digit value w_can be divided by 2t and cannot be divided by 2t+1, the multiplication includes adding a point obtained by multiplying a point Q with w/2t.
    • 在使用较小的桌子的同时保持对简单功率分析的抵抗力。 IC卡100使用椭圆曲线计算来解密加密信息,用于通过将椭圆曲线E上的点C乘以小于素数p的正整数的系数k来计算点k * C。 通过将获取的系数k的数字位置(窗口)值w与点数C相对应的数位位置(窗口值)w相乘而获得的相乘结果相加,执行点k * C的计算,并且相对于 全数位置 当存在满足获取的数字值w_可以除以2t而不能被除以2t + 1的条件的非负整数t时,乘法包括将通过将点Q与w / 2t相乘而获得的点相加。
    • 54. 发明申请
    • AUTHENTICATOR APPARATUS
    • 认证机器人
    • US20090271860A1
    • 2009-10-29
    • US12438901
    • 2007-11-02
    • Masao NonakaNatsume MatsuzakiYoshikatsu ItoKaoru YokotaYuichi FutaManabu Maeda
    • Masao NonakaNatsume MatsuzakiYoshikatsu ItoKaoru YokotaYuichi FutaManabu Maeda
    • H04L9/32
    • G06F21/31H04L9/3278
    • An authenticator apparatus which makes it difficult for an unauthorized user to masquerade and enhances safety includes an authenticating information holding unit (102) previously stores characteristic information indicating an input and output characteristic involving an environment change of an authentic authenticatee apparatus entitled to be authentic, an authenticating information transmitting unit (107) which transmits authenticating information to a portable medium (2), a response information receiving unit (108) which receives response information outputted from the portable medium (2) in response to an input of the authenticating information, an environment selecting unit (105) which identifies an environment of the portable medium (2), and a response information confirming unit (109) which determines whether or not the authenticating information and the response information satisfy the input and output characteristic indicated in the characteristic information stored in the authenticating information holding unit (102), and judges that the portable medium (2) is authentic in the case where the input and output characteristic is satisfied, the authenticating information and the response information being in the environment identified by said environment identifying unit.
    • 使非法用户难以伪装并提高安全性的认证装置包括:认证信息保存单元(102)预先存储指示涉及有权认证的真实认证设备的环境变化的输入和输出特性的特征信息, 响应信息接收单元,响应于所述认证信息的输入,接收从所述便携式介质输出的响应信息;响应信息接收单元,用于向所述便携式介质发送认证信息;响应信息接收单元, 识别便携式介质(2)的环境的环境选择单元(105)以及响应信息确认单元(109),其确定认证信息和响应信息是否满足特征信息中指示的输入和输出特性 储存在澳大利亚 在所述输入输出特性满足的情况下判定所述便携式介质(2)是可信的,所述认证信息保持单元(102),所述认证信息和所述响应信息在由所述环境识别单元识别的环境中。
    • 56. 发明授权
    • Transmission/reception system
    • 发射/接收系统
    • US07457410B2
    • 2008-11-25
    • US10836239
    • 2004-05-03
    • Hiroki YamauchiNatsume MatsuzakiYuusaku OhtaYuichi Futa
    • Hiroki YamauchiNatsume MatsuzakiYuusaku OhtaYuichi Futa
    • H04L9/00
    • H04L63/0442H04L9/0841H04L9/3271H04L63/08H04L63/10H04L2209/60H04L2463/101
    • A server and a client hold common secret information in respective secret information holding units. A server Cyclic Redundancy Check (CRC) unit in the server generates a CRC code after adding the secret information to communication data, and transmits the communication data with the CRC code attached. A client CRC unit of the client generates a CRC code after adding the secret information to communication data, and checks whether or not an error has occurred in the communication data on the communication path. Since the client holds the secret information, the client determines that an error has not occurred, and obtains the communication data. On the other hand, a router, which does not hold the secret information, is unable to obtain the communication data. This prevents the communication data from being transferred to devices outside an authorized domain.
    • 服务器和客户端在各个秘密信息保持单元中保存公用秘密信息。 服务器中的服务器循环冗余校验(CRC)单元在将秘密信息添加到通信数据后生成CRC代码,并发送带有附加CRC码的通信数据。 客户端CRC单元在将秘密信息添加到通信数据之后生成CRC码,并且检查通信路径中的通信数据中是否发生错误。 由于客户端保存秘密信息,所以客户机确定没有发生错误,并获得通信数据。 另一方面,不保存秘密信息的路由器不能获得通信数据。 这样可以防止通信数据被传送到授权域之外的设备。
    • 58. 发明申请
    • Content Management System and Content Management Unit
    • 内容管理系统和内容管理单元
    • US20080022416A1
    • 2008-01-24
    • US11632863
    • 2005-07-13
    • Hiroki YamauchiNatsume MatsuzakiYuichi FutaToshihisa Nakano
    • Hiroki YamauchiNatsume MatsuzakiYuichi FutaToshihisa Nakano
    • G06F21/22
    • G06F21/10G06F2221/2137
    • A content management system which can prevent a content from being copied exceeding the limited number of copies for the content. The content management system includes a first content management device and a second content management device. The first content management device stores period information that indicates an available period during which a first external device is permitted to use a copied content which has been copied from the content, and outputs the period information to the second content management device when the content is moved. Upon receiving the period information from the first content management device, the second content management device judges whether the available period of the copied content has expired, using the received period information, and if it is judges that the available period has not expired, it inhibits the content from being copied to the second external device.
    • 一种内容管理系统,其可以防止内容被复制超过该内容的有限数量的副本。 内容管理系统包括第一内容管理装置和第二内容管理装置。 第一内容管理装置存储指示允许第一外部装置使用从内容复制的复制内容的可用期间的周期信息,并且当内容移动时将该周期信息输出到第二内容管理装置 。 在从第一内容管理装置接收到期间信息的情况下,第二内容管理装置使用接收到的周期信息来判断复制内容的可用期间是否到期,如果判断为可用期间未到期,则抑制 将内容从复制到第二个外部设备。