公开(公告)号：JP2006324870A

公开(公告)日：2006-11-30

申请号：JP2005145337

申请日：2005-05-18

Applicant: DOSHISHA ,  ATR ADVANCED TELECOMM RES INST

Inventor： SASAOKA SHUICHI ,  AONO TOMOYUKI ,  HIGUCHI KEISUKE ,  ITO TAKASHI ,  TAROUMARU MAKOTO

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication system in which tapping of a private key can be suppressed. SOLUTION: A radio device 10 and an antenna 11 are built in the mouse 60 of a personal computer and in this state, (n) radio waves are sent and received between radio devices 10 and 30 while the directivity of an array antenna 20 is switched to (n) directivities. The radio device 10 detects (n) first radio wave intensities corresponding to the (n) first radio waves received from the radio device 30 and generates a private key Ks1 composed of a bit series on the basis of the (n) detected first radio wave intensities. Further, the radio device 30 detects (n) second radio wave intensities corresponding to the (n) second radio waves received from the radio device 10 and generates a private key Ks2 composed of the same bit series with the private key Ks1 on the basis of the (n) detected second radio wave intensities. COPYRIGHT: (C)2007,JPO&INPIT

公开(公告)号：JP2006042174A

公开(公告)日：2006-02-09

申请号：JP2004222011

申请日：2004-07-29

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 ,  ITO TAKASHI ,  OHIRA TAKASHI ,  TAROUMARU MAKOTO

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a communication system in which tapping is prevented and the same private key is shared among a plurality of terminals. SOLUTION: An access point 10 performs radio communication with a terminal 30, generates a private key α and shares the generated private key α with the terminal 30. In addition, the access point 10 performs radio communication with a terminal 40, generates a private key β and shares the generated private key β with the terminal 40. The access point 10 calculates exclusive OR of the private keys α, β, generates a private key γ, encrypts the private key γ by each of the private keys α, β and generates encryption data E(α, γ), E(β, γ). Then, the access point 10 transmits the encryption data E(α, γ), E(β, γ) to each of the terminals 30, 40, the terminals 30, 40 decode the encryption data E(α, γ), E(β, γ) by each of the private keys α, β and acquire the private key γ. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供防止窃听并且在多个终端之间共享相同私钥的通信系统。 解决方案：接入点10与终端30进行无线通信，产生私钥α并与终端30共享所生成的专用密钥α。此外，接入点10与终端40进行无线通信，生成 私钥β并与终端40共享生成的私钥β。接入点10计算私钥α，β的异或，生成私钥γ，通过私钥α， β并生成加密数据E（α，γ），E（β，γ）。 然后，接入点10向每个终端30,40发送加密数据E（α，γ），E（β，γ），终端30,40对加密数据E（α，γ），E（ β，γ），并获取私钥γ。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005150949A

公开(公告)日：2005-06-09

申请号：JP2003382854

申请日：2003-11-12

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 ,  MORI HIROKI ,  KITAURA AKITO ,  OHIRA TAKASHI ,  AONO TOMOYUKI ,  TAWARA SATORU

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

Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system capable of suppressing tapping of a private key. SOLUTION: A wireless device 30 transmits/receives a predetermined radio wave to/from a wireless device 10 while switching the directivity of an array antenna 20 among a plurality of types. The wireless devices 10 and 30 detect the strength of a plurality of radio waves when the directivity of the array antenna 20 is switched among a plurality of types, and form private keys Ks1 and Ks2, respectively, based on the plurality of strengths thus detected. In this regard, the wireless device 30 switches the directivity of the array antenna 20 among a plurality of types such that private keys Ks1 and Ks2 different from a private key Ks3 formed in a tapping device 50 are formed. The wireless devices 10 and 30 perform wireless communication mutually by encrypting/decrypting data using the private keys Ks1 and Ks2 thus formed. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供能够抑制私钥窃听的无线通信系统。 解决方案：无线设备30在切换多种类型的阵列天线20的方向性之间向无线设备10发送/接收预定无线电波。 无线设备10和30在多个类型之间切换阵列天线20的方向性时分别检测多个无线电波的强度，并基于所检测的多个强度分别形成专用密钥Ks1和Ks2。 在这点上，无线装置30切换多种类型的阵列天线20的方向性，从而形成与在攻丝装置50中形成的专用密钥Ks3不同的专用密钥Ks1和Ks2。 无线装置10和30通过使用这样形成的专用密钥Ks1和Ks2对数据进行加密/解密来相互进行无线通信。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004187197A

公开(公告)日：2004-07-02

申请号：JP2002354725

申请日：2002-12-06

Applicant: Doshisha ,  学校法人同志社

Inventor： SASAOKA SHUICHI ,  HORIIKE MOTOKI

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

Abstract: PROBLEM TO BE SOLVED: To provide a system constituted so that a normal transmitter/receiver individually creates a secret key in secret based on irregular fluctuation of radiowave propagation path characteristics of radio communication and the radio communication with high security is performed by using the created secret key.
SOLUTION: In the case of performing the radio communication by using the secret key, a signal for measurement is first transmitted from the respective radio stations 1, 2 to the other radio stations 2, 1, the signal for measurement which is transmitted from the other party and changed by the radio wave propagation path characteristics between the radio stations is received and time series of a delay profile is measured. Then, the secret keys are uniquely crated in the respective radio stations 1, 2 based on the delay profile and the communication is performed by using the shared secret keys.
COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2006295596A

公开(公告)日：2006-10-26

申请号：JP2005114365

申请日：2005-04-12

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 ,  TAROUMARU MAKOTO

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a radio communications system capable of suppressing wiretapping of secret key. SOLUTION: While switching the directivity of an array antenna 20 to n pieces of directivity, n radio waves are transmitted/received between radio devices 10, 30. The radio device 10 detects n first radio wave intensity levels, corresponding to n first radio waves received from the radio device 30, applies rearrangement, based on an interleaving method to n detected first radio wave intensity levels and generates a secret key Ks1 consisting of a bit string, on the basis of n first rearranged radio wave intensity levels. The radio device 30, however, detects n second radio wave intensity levels, corresponding to n second radio waves received from the radio device 10, applies rearrangement, based on the interleaving method to n detected second radio wave intensity levels and generates a secret key Ks2 consisting of the same bit string as the secret key Ks1, on the basis of n second rearranged radio wave intensity levels. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供能够抑制秘密密钥窃听的无线电通信系统。 解决方案：在将阵列天线20的方向性切换为n个方向性的同时，在无线电设备10,30之间发送/接收n个无线电波。无线电设备10检测n个第一无线电波强度水平，对应于n个第一 从无线电设备30接收的无线电波，基于交织方法对n个检测到的第一无线电波强度级别进行重新排列，并且基于n个第一重排无线电波强度级别生成由比特串组成的秘密密钥Ks1。 然而，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级别，基于交织方法对n个检测到的第二无线电波强度级别进行重排，并产生秘密密钥Ks2 基于n个第二重排无线电波强度水平，由与密钥Ks1相同的位串组成。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2006129052A

公开(公告)日：2006-05-18

申请号：JP2004314331

申请日：2004-10-28

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 ,  ITO TAKASHI ,  OHIRA TAKASHI ,  AONO TOMOYUKI

IPC: H04L9/08

Abstract: PROBLEM TO BE SOLVED: To provide a wireless device which can create a secret key to be used by a communication device which is connected or can be connected to a network. SOLUTION: When the directivity of an array antenna 40 whose directivity can be electrically switched is switched to j pieces of directivities; a wireless device 10 receives j pieces of electric waves from a wireless device 30 via an antenna 20, and then creates a first secret key based on the intensities of the j pieces of electric waves it received. Meanwhile, the wireless device 30 receives j pieces of electric waves from the wireless device 10 via the array antenna 40, and then creates a second secret key which is the same as the first one based on the intensities of the j pieces of electric waves it received. The wireless devices 10 and 30 supply the first and second secret keys to a personal computer 50 and an access point 60 via cables 1 and 2. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供可以创建要由连接或可以连接到网络的通信设备使用的秘密密钥的无线设备。 解决方案：当方向性可以被电切换的阵列天线40的方向性切换到j个方向性时; 无线设备10经由天线20从无线设备30接收j个电波，然后基于其接收的j个电波的强度创建第一秘密密钥。 同时，无线装置30经由阵列天线40从无线装置10接收j个电波，然后基于j个电波的强度创建与第一秘密密钥相同的第二秘密密钥 接收。 无线设备10和30通过电缆1和2将第一和第二密钥提供给个人计算机50和接入点60.版权所有：（C）2006，JPO＆NCIPI

公开(公告)号：JP2007267073A

公开(公告)日：2007-10-11

申请号：JP2006089849

申请日：2006-03-29

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： OHIRA TAKASHI ,  SASAOKA SHUICHI ,  ITO TAKASHI ,  YAMADA SHOGO ,  HASHIMOTO TORU

IPC: H04L9/08 ,  H04B7/10 ,  H04W12/08

Abstract: PROBLEM TO BE SOLVED: To provide a radio communication system which can suppress the eavesdropping of a secret key. SOLUTION: While the directivity of an array antenna 20 is switched to the directivity of n pieces, n pieces of electric waves are transmitted and received between radio devices 10 and 30. Further, the radio device 10 detects the n pieces of first electric wave intensity corresponding to the first n pieces of electric waves received from the radio device 30. By carrying out a predetermined operation to the first detected electric wave intensity of n pieces, a secret key Ks1 composed of a bit stream is created on the basis of the first permutated electric wave intensity of n pieces which are performed by the predetermined operation. Further, the radio device 30 detects the n pieces of second electric wave intensity corresponding to the second n pieces of electric waves received from the radio device 10. By carrying out a predetermined operation to the second detected electric wave intensity of n pieces, a secret key Ks2 composed of the same bit stream with that of the first secret key Ks1 is created on the basis of the second permutated electric wave intensity of n pieces which are performed by the predetermined operation. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够抑制秘密密钥窃听的无线电通信系统。 解决方案：当阵列天线20的方向性切换到n个方向性时，n个电波在无线电设备10和30之间被发送和接收。此外，无线电设备10检测n个第一个 电波强度对应于从无线电设备30接收的前n个电波。通过对n个第一检测电波强度执行预定的操作，基于比特流构成的秘密密钥Ks1 通过预定的操作执行n个第一个排列的电波强度。 此外，无线电设备30检测与从无线电设备10接收的第二n个电波相对应的n个第二电波强度。通过对n个第二检测到的电波强度执行预定的操作，秘密 基于通过预定操作执行的n个片段的第二置换电波强度来创建由与第一秘密密钥Ks1相同的比特流组成的密钥Ks2。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007194727A

公开(公告)日：2007-08-02

申请号：JP2006009005

申请日：2006-01-17

Applicant: Doshisha ,  学校法人同志社

Inventor： SASAOKA SHUICHI ,  IWAI MASATO ,  MIYAMOTO YUSUKE

IPC: H04J11/00 ,  H04B1/707 ,  H04B1/709 ,  H04J13/18

CPC classification number: H04L5/0021 ,  H04B2201/709709 ,  H04J13/0048 ,  H04J2013/165

Abstract: PROBLEM TO BE SOLVED: To provide MC-CDMA transmitters and receivers using a new orthogonal diffusion code in which the influence of delay waves appears only in a specific user. SOLUTION: An MC-CDMA system using a multi-carrier CDMA system comprises: the transmitter for multiplying the real-axis and imaginary-axis components of a transmission signal in a frequency region by sinusoidal signals that orthogonally cross since the amplitude is 1 and the period differs among users for diffusion and dividing into a plurality of orthogonal subcarriers for multiplexing and transmitting; and the receiver for multiplying the real-axis and imaginary-axis components of a transmission signal from the transmitter by sinusoidal signals that orthogonally cross since the amplitude is 1 and the period differs among users for inverse diffusion and for receiving the transmission signal. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：使用新的正交扩散码来提供MC-CDMA发射机和接收机，其中延迟波的影响仅在特定用户中出现。 解决方案：使用多载波CDMA系统的MC-CDMA系统包括：发射机，用于通过正交信号乘以频率区域中的发射信号的实轴和虚轴分量，因为幅度是 1，并且用于扩散的用户之间的周期不同，并且被分成用于复用和发送的多个正交子载波; 以及接收机，用于将来自发射机的发射信号的实轴和虚轴分量乘以由于幅度为1而正交交叉的正弦信号，并且用于反向扩散的用户之间的周期不同，并且用于接收发送信号。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2007189422A

公开(公告)日：2007-07-26

申请号：JP2006004992

申请日：2006-01-12

Applicant: Doshisha ,  学校法人同志社

Inventor： SASAOKA SHUICHI ,  IWAI MASATO ,  KITAURA AKITO

IPC: H04L9/32 ,  G09C1/00

Abstract: PROBLEM TO BE SOLVED: To eliminate the need to provide an authentication server or authentication station for mutual authentication between a station and an access point, and to improve the security level.
SOLUTION: The access station and access point store identification information on connection destinations and themselves, and also uniquely generate and store secret keys based upon radio wave propagation characteristics between radio stations. Then the access point encrypts its identification information with its secret key and transmits the identification information to the station, which deencrypts the received signal with the secret key and authenticates whether the deencrypted signal matches the identification information on the access point stored in its storage section. The station also encrypts its identification information with its secret key and transmits the encrypted information to the access point, which deencrypts the received signal with its secret key and authenticates whether the deencrypted signal matches the identification information stored in its storage section.
COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：为了消除提供用于站和接入点之间的相互认证的认证服务器或认证站的需要，并且提高安全级别。 解决方案：接入站和接入点存储连接目的地及其本身的识别信息，并且还基于无线电台之间的无线电波传播特性唯一地生成和存储秘密密钥。 然后接入点用其秘密密钥加密其识别信息，并将识别信息发送到站，该站用秘密密钥解密接收到的信号，并且验证加密信号是否与存储在其存储部分中的接入点上的识别信息相匹配。 该站还使用其秘密密钥对其识别信息进行加密，并将加密的信息发送到接入点，该接入点用其秘密密钥解密接收到的信号，并且验证加密信号是否与存储在其存储部分中的识别信息相匹配。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2008205929A

公开(公告)日：2008-09-04

申请号：JP2007040939

申请日：2007-02-21

Applicant: Doshisha ,  Matsushita Electric Works Ltd ,  学校法人同志社 ,  松下電工株式会社

Inventor： GOSHIMA SHIGEO ,  SASAOKA SHUICHI ,  IWAI MASATO

IPC: H04L12/28 ,  H04B7/26 ,  H04L12/70 ,  H04L12/701 ,  H04L12/753 ,  H04L12/825 ,  H04W16/26 ,  H04W40/24 ,  H04W84/12

Abstract: PROBLEM TO BE SOLVED: To make repair of a communication system itself, etc. unnecessary even when the number of devices is increased or decreased in the communication system which transmits information from devices distributed and arranged to a master unit by radio. SOLUTION: The master unit P transmits information indicating that a transmitting origin is the master unit and a routing setting signal r by broadcast. On receiving the routing setting signal r, each slave unit S attached to each device recognizes that hierarchy of self-unit is lower hierarchy by one from the transmitting origin and stores the fact and transmits the stored hierarchy and ID of the self-unit by broadcast in addition to the routing setting signal r. While the routing setting signal r is transmitted to a slave unit S at the end, each slave unit S recognizes the hierarchy of the self-unit and a high order slave unit S. Each slave unit S transmits information and IDs of each hierarchy to the master unit P by repeating operations for adding the hierarchy and the ID of the self-unit to the hierarchy and the ID transmitted from a lower hierarchy to be transmitted to a slave unit in upper hierarchy. The master unit P creates a routing tree on the basis of hierarchy and IDs of each slave unit S. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：即使在通过无线电从发送和布置到主单元的设备发送信息的通信系统中增加或减少设备的数量时，也不需要修复通信系统本身等。 解决方案：主单元P通过广播发送指示发送源是主单元的信息和路由设置信号r。 在接收到路由设置信号r时，附加到每个设备的每个从单元S从发送源识别出自身的层次结构是较低层次的，并且存储该事实，并且通过广播发送存储的自组织的层级和ID 除路由设置信号r外。 当路由设置信号r在结束时发送到从单元S时，每个从单元S识别自身单元的层级和高阶从单元S.每个从单元S向每个从单元S发送信息和各层次的ID 主单元P通过重复将层级和自身单元的ID添加到层次结构的操作和从较低层次发送的ID发送到上级的从单元。 主单元P根据每个从属单元S的层级和ID创建路由树。版权所有：（C）2008，JPO＆INPIT