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    • 1. 发明授权
    • Method for sharing secret information and performing certification in a
communication system that has a plurality of information processing
apparatuses
    • 用于在具有多个信息处理设备的通信系统中共享秘密信息和执行认证的方法
    • US5708714A
    • 1998-01-13
    • US507524
    • 1995-07-26
    • Jose Manuel Cerecedo LopezKeiichi Iwamura
    • Jose Manuel Cerecedo LopezKeiichi Iwamura
    • H04L9/08H04L9/32H04L9/00
    • H04L9/085H04L9/3255H04L2209/601
    • The object of the present invention is to perform verifiable secret sharing by a practical amount of calculation and a practical amount of communication. In addition, by using this process, a shared digital signature is generated, or a shared authentication server is provided. In a communication system where a plurality of information processing apparatuses are connected across secret communication channels and a broadcast communication channel, an information processing apparatus d generates a secret matrix from secret information s, l1, . . . , lk, extracts the first information segments for individual apparatuses i, and secretly transmits it to each apparatus i. The information processing apparatus d performs hash function on the secret matrix and broadcasts the output value. Each information processing apparatus i generates and broadcasts a random number, while the information processing apparatus d generates and broadcasts the second information segment from a partial array in consonance with the random number value. Each information processing apparatus i generates the third information segment in consonance with the first information segment and the random number, and verifies that the secret information has been correctly shared by comparing the third information segment with the second. By employing this secret information sharing method, apparatuses that belong to a group of signers cooperatively generate a signature, and a plurality of apparatuses that constitute authentication servers cooperatively provide authentication.
    • 本发明的目的是通过实际的计算量和实际的通信量来执行可验证的秘密共享。 此外,通过使用该处理,生成共享数字签名,或者提供共享认证服务器。 在多个信息处理装置跨越秘密通信信道和广播通信信道连接的通信系统中,信息处理装置d从秘密信息s1,l1生成秘密矩阵。 。 。 lk提取各个设备i的第一信息段,并秘密地将其发送到每个设备i。 信息处理装置d对秘密矩阵执行散列函数并广播输出值。 每个信息处理设备i产生并广播随机数,而信息处理设备d根据随机数值从部分阵列产生并广播第二信息段。 每个信息处理装置i根据第一信息段和随机数生成第三信息段,并通过将第三信息段与第二信息段进行比较来验证秘密信息是否被正确共享。 通过采用这种秘密信息共享方法,属于一组签名者的装置协同地生成签名,构成认证服务器的多个装置协同提供认证。
    • 5. 发明授权
    • Image data verification system
    • 图像数据验证系统
    • US07535488B2
    • 2009-05-19
    • US09987832
    • 2001-11-16
    • Satoru WakaoKeiichi Iwamura
    • Satoru WakaoKeiichi Iwamura
    • H04N5/225H04N7/167H04L9/00
    • H04N1/32128H04L9/3247H04L2209/60H04N2201/3205H04N2201/3235H04N2201/3236H04N2201/3274H04N2201/3278
    • An image verification system has an image generation device and a first image verification device. The image generation device includes (a) an image data generation unit that generates image data, and (b) a first verification data generation unit that generates first verification data from the image data using a common key in common key cryptography. The first image verification device includes (a) a first verification unit that verifies, using the image data, the first verification data and the common key, whether the image data is altered, and (b) a second verification data generation unit that generates second verification data from the image data using a private key in public key cryptography without editing the image data, if the first verification unit verifies that the image data is not altered.
    • 图像验证系统具有图像生成装置和第一图像验证装置。 图像生成装置包括:(a)生成图像数据的图像数据生成单元,以及(b)第一验证数据生成单元,其使用公共密钥加密中的公共密钥从图像数据生成第一验证数据。 第一图像验证装置包括:(a)第一验证单元,其使用图像数据验证第一验证数据和公共密钥,是否改变图像数据;以及(b)生成第二验证数据的第二验证数据生成单元 如果第一验证单元验证图像数据未被改变,则使用公共密钥加密中的专用密钥从图像数据获得的验证数据,而不编辑图像数据。
    • 6. 发明申请
    • Data Processing Apparatus and Its Method
    • 数据处理装置及其方法
    • US20080276095A1
    • 2008-11-06
    • US11574089
    • 2005-10-25
    • Keiichi Iwamura
    • Keiichi Iwamura
    • H04L9/32
    • H04L9/3242H04L9/0869H04L9/3247
    • A verification information generation system comprises a first and a second data processing apparatuses. The first data processing apparatus comprises a holding unit adapted to hold a first secret information which is set in advance, a reception unit adapted to receive information associated with the second secret information from the second data processing apparatus, a key information generation unit adapted to generate key information on the basis of the first secret information and the information associated with the second secret information, a key derivation auxiliary information generation unit adapted to generate key derivation auxiliary information which allows the key information to be derived from the second secret information, a verification information generation unit adapted to generate verification information on the basis of information to be verified and the key information, and an output unit adapted to output the information to be verified, the verification information, and the key derivation auxiliary information. The second secret information is information which is set in advance in the second data processing apparatus.
    • 验证信息生成系统包括第一和第二数据处理装置。 第一数据处理装置包括:保持单元,适于保持预先设置的第一秘密信息;接收单元,适于从第二数据处理装置接收与第二秘密信息相关联的信息;密钥信息生成单元,适于生成 基于所述第一秘密信息和与所述第二秘密信息相关联的信息的密钥信息,密钥导出辅助信息生成单元,其适于生成允许从所述第二秘密信息导出所述密钥信息的密钥导出辅助信息,验证 信息生成单元,其适于基于要验证的信息和密钥信息生成验证信息;以及输出单元,适于输出要被验证的信息,验证信息和密钥导出辅助信息。 第二秘密信息是在第二数据处理装置中预先设定的信息。
    • 8. 发明申请
    • DATA PROCESSING APPARATUS, DATA PROCESSING SYSTEM, DATA PROCESSING METHOD, AND STORAGE MEDIUM
    • 数据处理设备,数据处理系统,数据处理方法和存储介质
    • US20060253448A1
    • 2006-11-09
    • US11458439
    • 2006-07-19
    • Nobuhiro TagashiraKeiichi IwamuraTsutomu Ando
    • Nobuhiro TagashiraKeiichi IwamuraTsutomu Ando
    • G06F17/30
    • H04N21/2541G06Q50/184H04N21/835
    • A data processing apparatus for reproducing a plurality of object streams having predetermined information severally, which apparatus is provided with an IPMP information extraction circuit (54) for extracting hierarchical management information for controlling the permission and inhibition of the usage of each object from input data, a usage status check circuit (56) for judging whether the usage of an upper level object of a subjected object is prohibited or not in accordance with the IPMP information extracted by the IPMP information extraction circuit (54), and a control information extraction circuit (58) for controlling the data processing apparatus to prohibit the usage of the subjected object if the usage of the upper level object of the subjected object is prohibited in accordance with a judgment result by the usage status check circuit (56).
    • 一种数据处理装置,用于分别再现具有预定信息的多个对象流,该装置设置有IPMP信息提取电路(54),用于从输入数据中提取用于控制每个对象的使用的许可和禁止的分层管理信息, 使用状况检查电路(56),根据IPMP信息提取电路(54)提取出的IPMP信息,判定受影响对象的上位对象的使用是否被禁止;以及控制信息提取电路 58),用于根据使用状态检查电路(56)的判断结果,如果禁止使用被摄体的上位对象,则控制数据处理装置禁止使用被处理物体。