公开(公告)号：JP2007181078A

公开(公告)日：2007-07-12

申请号：JP2005379372

申请日：2005-12-28

Applicant: Doshisha ,  学校法人同志社

Inventor： SASAOKA SHUICHI ,  IWAI MASATO ,  KITAURA AKITO

IPC: H04L9/32 ,  G09C1/00 ,  H04L12/28

Abstract: PROBLEM TO BE SOLVED: To reduce a risk that a secret key such as an authentication key is decoded when a station (STA) and an access point (AP) are authenticated. SOLUTION: A secret key common to the STA and the AP is uniquely generated beforehand, a challenge text is generated at the AP based on an access request from the STA, encrypted by the secret key and transmitted to the STA. At the STA, the encrypted challenge text is decoded by the secret key, further encrypted by a WEP key and returned to the AP. At the AP, the received encrypted challenge text is decoded by the WEP key to confirm coincidence between the decoded challenge text and and the challenge text transmitted from the STA. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了减少当站（STA）和接入点（AP）被认证时诸如认证密钥之类的秘密密钥被解码的风险。 解决方案：预先唯一地生成STA和AP共同的秘密密钥，基于来自STA的访问请求，在AP处生成质询文本，由秘密密钥加密并发送给STA。 在STA处，加密的挑战文本由秘密密钥解码，由WEP密钥进一步加密并返回给AP。 在AP处，通过WEP密钥对接收到的加密挑战文本进行解码，以确认解码的挑战文本与从STA发送的挑战文本之间的一致性。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2005333488A

公开(公告)日：2005-12-02

申请号：JP2004150820

申请日：2004-05-20

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  OHIRA TAKASHI ,  AONO TOMOYUKI

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system capable of generating private keys suited to the original characteristics of a transmission path.
SOLUTION: The wireless communication system 100 is provided with wireless apparatuses 10, 30, an antenna 11, and an array antenna 20. In the case of generating the private keys on the basis of a plurality of strengths of radio waves received from an opposite party while changing the directivity of the array antenna 20 into a plurality of directivities, the wireless apparatuses 10, 30 detect the strength of each radio wave on the basis of a plurality of sampling values resulting from sampling each radio wave by a plurality of sampling timings and discarding the maximum value and the minimum value of the plurality of sampling values to detect a plurality of radio wave strengths corresponding to a plurality of radio waves, and apply multi-value processing to the plurality of radio wave strengths by discarding the maximum strength and the minimum strength among the plurality of radio wave strengths equal to or more than a threshold value. Then the wireless apparatuses 10, 30 use bit patterns multi-valued for the private keys Ks1, Ks2.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供能够生成适合于传输路径的原始特性的私钥的无线通信系统。 解决方案：无线通信系统100设置有无线设备10,30，天线11和阵列天线20.在根据从多个无线电波接收的无线电波的多个强度生成私钥的情况下 在将阵列天线20的方向性改变为多个方向性的同时，无线装置10,30基于由各个无线电波采样而产生的多个采样值来检测每个无线电波的强度 采样定时，并且丢弃多个采样值的最大值和最小值，以检测对应于多个无线电波的多个无线电波强度，并且通过丢弃最大值来对多个无线电波强度应用多值处理 多个无线电波强度之中的强度和最小强度等于或大于阈值。 然后，无线装置10,30使用对于私钥Ks1，Ks2多值的位模式。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005333438A

公开(公告)日：2005-12-02

申请号：JP2004150228

申请日：2004-05-20

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  OHIRA TAKASHI ,  AONO TOMOYUKI

IPC: H04L9/08 ,  H04W12/02 ,  H04W12/04 ,  H04W88/02 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system capable of generating a private key through accurate multi-value coding.
SOLUTION: The wireless communication system 100 is provided with wireless apparatuses 10, 30, an antenna 11, and an array antenna 20. The wireless apparatuses 10, 30 detect n radio wave strengths corresponding to n radio waves received from an opposite party and whose DC offset is eliminated while changing the directivity of the array antenna 20 into a plurality of directivities. In this case, the DC offset is eliminated for each packet and for each of real parts and imaginary parts of the radio waves. Then the wireless apparatuses 10, 30 apply multi-value processing to n sets of the radio wave strengths whose DC offset is eliminated depending on a threshold value to generate the private keys Ks1, Ks2.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供能够通过精确的多值编码产生私钥的无线通信系统。 解决方案：无线通信系统100设置有无线装置10,30，天线11和阵列天线20.无线装置10,30检测对应于从对方接收的n个无线电波的n个无线电波强度 并且在将阵列天线20的方向性改变为多个方向性的同时消除其直流偏移。 在这种情况下，对于每个分组以及无线电波的实部和虚部中的每一个，消除了DC偏移。 然后，无线装置10,30对根据阈值消除DC偏移的n组无线电波强度进行多值处理，以生成私钥Ks1，Ks2。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2008199263A

公开(公告)日：2008-08-28

申请号：JP2007031741

申请日：2007-02-13

Applicant: Doshisha ,  学校法人同志社

Inventor： SASAOKA SHUICHI ,  IWAI MASATO ,  KITAURA AKITO

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a secret key generation method by which an effective secret key can be generated by reducing effect of noise existing between radio stations and by securing sufficient information.
SOLUTION: When each radio station uniquely generates a secret key based on radio wave propagation line characteristics between radio stations, a known observing signal is firstly transmitted to the other station from each radio station, and the observing signal which has changed by the radio wave propagation line characteristics on the way is received on the other station side. A complex discrete Fourier transform is performed to a sample value of an analog signal observed by each radio station, each spectrum component is obtained, a numerous value number for quantizing based on an amplitude for a spectrum component larger than a threshold among spectrum components is set, and a phase reference for quantizing a phase is set. Thus, a quantized secret key indicated by the numerous value number by using the numerous value number and the phase reference is generated.
COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种秘密密钥生成方法，通过该秘密密钥生成方法可以通过减少存在于无线电台之间的噪声的影响并通过确保足够的信息来生成有效的秘密密钥。 解决方案：当每个无线电台根据无线电台之间的无线电波传播线路特性独特地生成秘密密钥时，首先从每个无线电台向另一台站发送一个已知的观测信号，并且通过 无线电波传播线路特性在另一台站接收。 对每个无线电台所观测到的模拟信号的采样值执行复数离散付里叶变换，得到每个频谱分量，基于频谱分量中大于阈值的频谱分量的幅度进行量化的多个数值集被设置 ，并设定用于量化相位的相位基准。 因此，生成通过使用多个值号和相位基准由多个值号指示的量化秘密密钥。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2006222817A

公开(公告)日：2006-08-24

申请号：JP2005035267

申请日：2005-02-10

Applicant: DOSHISHA

Inventor： SASAOKA SHUICHI ,  WATANABE YOSHIAKI ,  KITAURA AKITO

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To generate a common secret key without binarizing receiving strength which is changed by radio wave propagation path characteristics with a threshold when the secret key is generated based on the radio wave propagation path characteristics between radio stations. SOLUTION: When the secret key is generated, based on the radio wave propagation path characteristics between a base station CS and a mobile station PS, the base station CS is comprised to have two antennas A and B. Signal intensity received by switching the antenna A and the antenna B is compared for each sampling time at the base station CS and the mobile station PS, respectively. The secret key is generated, based on the comparison information. When a binary series is generated, based on sizes of the signal strengths, a plurality of binary series candidates are generated while switching (0, 1) at positions in which the sizes are difficult to be compared. A key candidate with a minimum number of error bits is extracted from all the binary series candidates. COPYRIGHT: (C)2006,JPO&NCIPI

公开(公告)号：JP2006217301A

公开(公告)日：2006-08-17

申请号：JP2005028411

申请日：2005-02-04

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  AONO TOMOYUKI ,  HIGUCHI KEISUKE ,  OHIRA TAKASHI

IPC: H04L9/16 ,  H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication system where a private key is generated while suppressing tapping. SOLUTION: While the directivity of an array antenna 20 is switched to n directivities and a carrier frequency is switched to m carrier frequencies, n radio waves are transmitted and received between radio equipments 10 and 30. Then, the radio equipment 10 detects n first radio wave intensities corresponding to n first radio waves received from the radio equipment 30, and generates a private key Ks1 consisting of a bit string based on the detected n first radio wave intensity. Then, the radio equipment 30 detects n second radio wave intensities corresponding to n second radio waves received from the radio equipment 10, and generates a private key Ks2 consisting of the same bit string as that of the private key Ks1 based on the detected n second radio wave intensity. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供在抑制窃听的同时产生私钥的无线电通信系统。 解决方案：当阵列天线20的方向性被切换到n个方向性并且载波频率被切换到m个载波频率时，在无线电设备10和30之间发射和接收n个无线电波。然后，无线电设备10检测 n个对应于从无线电设备30接收的n个第一无线电波的第一无线电波强度，并且基于检测到的n个第一无线电波强度生成由比特串组成的专用密钥Ks1。 然后，无线电设备30检测对应于从无线电设备10接收的n个第二无线电波的n个第二无线电波强度，并且基于检测到的n秒生成由与私钥Ks1相同的位串组成的专用密钥Ks2 无线电波强度。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006115103A

公开(公告)日：2006-04-27

申请号：JP2004299057

申请日：2004-10-13

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  AONO TOMOYUKI ,  OHIRA TAKASHI

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication system in which eavesdropping of a private key can be suppressed and the private key can be updated in a short time. SOLUTION: One radio device forms the private key Ks1 based on the characteristics of a transmission path between two radio devices when starting encryption communication. Another radio device updates a private key Ks2 by the same method as the updating of the private key Ks1 in the one radio device. The one radio device sequentially forms partial private keys Ks1-p1 to Ks1-pn based on the characteristics of the transmission path, sequentially replaces the partial PA1 to PAn of the private key Ks1 into partial private keys Ks1-p1 to Ks1-pn, and updates the private key Ks1. Moreover, the other radio device updates the private key Ks2 by the same method as the updating of the private key Ks1 in the one radio device. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种可以抑制窃听私钥并且可以在短时间内更新私钥的无线电通信系统。 解决方案：当开始加密通信时，一个无线电设备基于两个无线电设备之间的传输路径的特性形成私钥Ks1。 另一无线电设备通过与一个无线电设备中的私钥Ks1的更新相同的方法来更新私钥Ks2。 一个无线电设备基于传输路径的特性顺序地形成部分专用密钥Ks1-p1至Ks1-pn，将私钥Ks1的部分PA1至PAn顺序地替换为部分专用密钥Ks1-p1至Ks1-pn，以及 更新私钥Ks1。 此外，其他无线装置通过与一个无线装置中的私钥Ks1的更新相同的方法来更新专用密钥Ks2。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005333489A

公开(公告)日：2005-12-02

申请号：JP2004150823

申请日：2004-05-20

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  OHIRA TAKASHI ,  AONO TOMOYUKI

IPC: H04L9/08 ,  H04W12/04 ,  H04W88/02 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system capable of accurately generating private keys by preventing mulfunction of wireless apparatuses. SOLUTION: The wireless communication system 100 is provided with wireless apparatuses 10, 30, an antenna 11, and an array antenna 20. The wireless apparatuses 10, 30 extract n-sets of radio wave strengths equal to or more than a threshold value whereby communication with the opposite party can be established and within the dynamic range of the wireless apparatuses 10, 30 from p-sets of radio wave strengths corresponding to p-sets of received radio waves by receiving p-sets of the radio waves from the opposite party while changing the beam pattern of the array antenna 20 into p sets of beam patterns after establishing communication with the opposite party. Then the wireless apparatuses 10, 30 apply multi-value processing to n-sets of the extracted radio wave strengths to generate the private keys Ks1, Ks2. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种能够通过防止无线设备的结合来精确地生成私钥的无线通信系统。 解决方案：无线通信系统100设置有无线装置10,30，天线11和阵列天线20.无线装置10,30提取等于或大于阈值的n组无线电波强度 可以通过接收来自所接收的无线电波的p组的p组的p组的无线电波强度的p组而在无线设备10,30的动态范围内建立与对方的通信 在与对方建立通信之后，将阵列天线20的波束图案改变成p组波束图案。 然后，无线装置10,30对所提取的无线电波强度的n组应用多值处理，以生成私钥Ks1，Ks2。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005333439A

公开(公告)日：2005-12-02

申请号：JP2004150232

申请日：2004-05-20

Applicant: Advanced Telecommunication Research Institute International ,  Doshisha ,  学校法人同志社 ,  株式会社国際電気通信基礎技術研究所

Inventor： SASAOKA SHUICHI ,  OHIRA TAKASHI ,  AONO TOMOYUKI

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system in which one and the same private key can be produced between two wireless apparatuses. SOLUTION: The wireless communication system 100 is provided with wireless apparatuses 10, 30, an antenna 11, and an array antenna 20. The wireless apparatuses 10, 30 detect wave strengths of n radio waves received from an opposite party while changing the directivity of the array antenna 20 into a plurality of directivities and extract k-sets of the radio wave strengths equal to or more than a threshold value th1 among the detected n-sets of the radio wave strengths. Then the wireless apparatuses 10, 30 calculate an average of k-sets of the radio wave strengths as a threshold value th2, nullify a prescribed range of the radio wave strengths existing in the vicinity of the threshold value th2, use the threshold value th2 to apply multi-value processing to a plurality of remaining radio wave strengths thereby respectively generating the private keys Ks1, Ks2. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种无线通信系统，其中可以在两个无线设备之间产生一个和相同的私钥。 解决方案：无线通信系统100设置有无线装置10,30，天线11和阵列天线20.无线装置10,30检测从对方接收的n个无线电波的波长，同时改变 将阵列天线20的方向性转换为多个方向性，并且提取检测到的n组无线电波强度中等于或大于阈值th1的无线电波强度的k组。 然后，无线装置10,30将无线电波强度的k组的平均值计算为阈值th2，使存在于阈值th2附近的无线电波强度的规定范围无效，使用阈值th2 对多个剩余无线电波强度应用多值处理，从而分别产生私钥Ks1，Ks2。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005018701A

公开(公告)日：2005-01-20

申请号：JP2003186307

申请日：2003-06-30

Applicant: Cubic:Kk ,  Doshisha ,  学校法人同志社 ,  株式会社キュービック

Inventor： ARAI YASUHIRO ,  YOYASU JUN ,  WATANABE YOSHIAKI ,  SASAOKA SHUICHI

IPC: G06Q50/00 ,  G06Q50/30 ,  G08G1/00 ,  G06F17/60

Abstract: PROBLEM TO BE SOLVED: To collect and manage correct running information even if taking a train and getting off the train are repeated in a rolling stock running management system which is provided with a running information acquisition device, information transfer device, and operation information management device, sends running information to the operation information management device from the running information acquisition device by using the information transfer device as an intermediate, and manages the running information by the operation information management device. SOLUTION: Working start information is provided among the running information acquisition device, information transfer device, and operation information management device. The collection and transmission of the running information are controlled by the presence or absence of the working start information. Or, the repetition or dropout of the running information is prevented from being caused by addressing the running information whenever taking the train and getting off the train. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：即使在设置有行驶信息获取装置，信息传递装置和操作的车辆行驶管理系统中重复列车和下车，也收集和管理正确的运行信息 信息管理装置，通过使用信息传送装置作为中间，从运行信息获取装置向运行信息管理装置发送运行信息，并通过运行信息管理装置管理运行信息。 解决方案：在运行信息获取装置，信息传送装置和操作信息管理装置之间提供工作启动信息。 正在运行的信息的收集和发送是通过工作开始信息的存在或不存在来控制的。 或者，通过在乘坐火车和下车时解决运行的信息，防止运行信息的重复或退出。 版权所有（C）2005，JPO＆NCIPI