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    • 1. 发明授权
    • Shop apparatus and purchaser apparatus
    • 商店设备和购买者设备
    • US09129262B2
    • 2015-09-08
    • US11963138
    • 2007-12-21
    • Takuya YoshidaMinako TadaNorikazu HosakaKoji OkadaTakehisa Kato
    • Takuya YoshidaMinako TadaNorikazu HosakaKoji OkadaTakehisa Kato
    • G06Q30/00G06Q30/06G06Q10/10
    • G06Q10/107G06Q30/0609G06Q30/0615
    • A purchaser apparatus stores “anonymous order information including an order ID and purchaser identity verifying information” and “purchaser identity proving secret information”. A shop apparatus stores “anonymous order information including an order ID and purchaser identity verifying information”. If necessary, a purchaser sends a request including an order ID and zero knowledge proving information that a purchaser knows the purchaser identity proving secret information, from a purchaser apparatus to a shop apparatus. A shop apparatus verifies the zero knowledge proving information, based on purchaser identity verifying information retrieved from an order ID included in the request. Therefore, the unlinkability for past use is eliminated if necessary, and inconvenience caused by the unlinkability is eliminated.
    • 购买者设备存储“包括订单ID和购买者身份验证信息的匿名订单信息”和“购买者身份证明秘密信息”。 商店装置存储包括订单ID和购买者身份验证信息的匿名订单信息。 如果需要,购买者从购买者设备向购买者发送包括购买者知道购买者身份证明秘密信息的订单ID和零知识证明信息的请求。 商店装置基于从包含在请求中的订单ID检索的购买者身份验证信息来验证零知识证明信息。 因此,如果需要,消除过去使用的不连接性,并且消除由不连接性引起的不便。
    • 5. 发明申请
    • SECRET SHARING APPARATUS, METHOD, AND PROGRAM
    • 秘密共享设备,方法和程序
    • US20080232580A1
    • 2008-09-25
    • US12051524
    • 2008-03-19
    • Norikazu HOSAKAYoshihiro FujiiMinako TadaTakehisa Kato
    • Norikazu HOSAKAYoshihiro FujiiMinako TadaTakehisa Kato
    • H04L9/28
    • H04L9/085
    • A secret sharing apparatus according to the present invention is based on a (k,n)-threshold scheme with a threshold of at least 4. The secret sharing apparatus generates a generator matrix (G) of GF(2) in which any k of n column vectors are at a full rank, divides secret information into n−1 pieces to generate divided secret data (K(1), . . . , K(n−1)), generates random data (U(0,1), . . . , U(k−2,n−1)), calculates the product of matrixes of the divided secret data, the random data, and the generator matrix (G), assigns the j×(n−1)+ith column of the calculation result to sharing partial data (D(j,i)) to calculate sharing partial data (D(j,1)), generates header information (H(j)), and individually distributes n pieces of sharing information (D(0), . . . , D(n−1)) made up of the header information (H(j)) and sharing partial data (D(j,i)) to n storage apparatuses.
    • 根据本发明的秘密共享装置基于具有至少4的阈值的(k,n)阈值方案。秘密共享装置生成GF(2)的生成矩阵(G),其中任何k n个列向量处于满秩,将秘密信息划分为n-1个部分,以产生分割的秘密数据(K(1),...,K(n-1)),生成随机数据(U(0,1) ,...,U(k-2,n-1))计算分割的秘密数据,随机数据和生成矩阵(G)的矩阵的乘积,分配jx(n-1)+ i 计算结果的列以共享部分数据(D(j,i))以计算共享部分数据(D(j,1)),生成头信息(H(j)),并且分别分配n个共享信息 (H(j))和共享部分数据(D(j,i))组成的D(0),...,D(n-1))。
    • 6. 发明授权
    • Secret sharing apparatus, method, and program
    • 秘密共享装置,方法和程序
    • US08077863B2
    • 2011-12-13
    • US12051524
    • 2008-03-19
    • Norikazu HosakaYoshihiro FujiiMinako TadaTakehisa Kato
    • Norikazu HosakaYoshihiro FujiiMinako TadaTakehisa Kato
    • H04K1/00H04L9/00H04L9/28H04L29/06G06F15/16
    • H04L9/085
    • A secret sharing apparatus according to the present invention is based on a (k,n)-threshold scheme with a threshold of at least 4 but is still operational with a threshold of at least 2. The secret sharing apparatus generates a generator matrix (G) of GF(2) in which any k of n column vectors are at a full rank, divides secret information into n−1 pieces to generate divided secret data (K(1), . . . , K(n−1)), generates random data (U(0,1), . . . , U(k−2,n−1)), calculates the product of matrixes of the divided secret data, the random data, and the generator matrix (G), assigns the j×(n−1)+ith column of the calculation result to sharing partial data (D(j,i)) to calculate sharing partial data (D(j,1)), generates header information (H(j)), and individually distributes n pieces of sharing information (D(0), . . . , D(n−1)) made up of the header information (H(j)) and sharing partial data (D(j,i)) to n storage apparatuses.
    • 根据本发明的秘密共享装置是基于具有至少4的阈值的(k,n)阈值方案,但仍然以至少2的阈值运行。秘密共享装置生成生成矩阵(G ),其中n列n向量的任何k处于满秩,将秘密信息划分成n-1个部分,以产生分割的秘密数据(K(1),...,K(n-1)) ,生成随机数据(U(0,1),...,U(k-2,n-1)),计算分割的秘密数据,随机数据和生成矩阵(G)的矩阵乘积, ,将计算结果的j×(n-1)+ i列分配给共享部分数据(D(j,i)),以计算共享部分数据(D(j,1)),生成报头信息 ),并且分别分配由标题信息(H(j))和共享部分数据(D(j,i))组成的n条共享信息(D(0),...,D(n-1) ))存储到n个存储装置。