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    • 5. 发明授权
    • Secret information service system and method
    • 秘密信息服务系统和方法
    • US5117458A
    • 1992-05-26
    • US606898
    • 1990-10-31
    • Kazuo TakaragiRyoichi SasakiTsutomu NakamuraMinoru KoizumiYasuko FukuzawaKenji Kataoka
    • Kazuo TakaragiRyoichi SasakiTsutomu NakamuraMinoru KoizumiYasuko FukuzawaKenji Kataoka
    • H04L9/08
    • H04L9/0833H04L2209/601
    • An information service system including a plurality of receiving stations and information service facilities. The information service facilities include a memory circuit which stores beforehand a distribution destination information set of receiving station identifiers allocated to the receiving stations, distribution destination information set being disposed in a predetermined order within the memory circuit, a memory circuit for storing a plurality of information to be supplied to receiving stations, an enciphering circuit for generating an enciphering key for optical receiving stations within a group which performs broadcast communications, and enciphering the service information with the enciphering key, and a circuit for transmitting the enciphered service information and service destination codes of service destination receiving stations encoded from the distribution destination information set, through broadcast communications. Each receiving station includes a memory circuit for storing beforehand its own identifier and the distribution destination information set of the group which performs broadcast communications, a receiver unit for receiving the enciphered service information and the service destination codes from the information service facilities, and a deciphering circuit for generating a deciphering key corresponding to the distribution destination information set in accordance with the received service destination codes and the corresponding, and previously stored distribution destination information, only when the own identifier of the receiving station is contained in the service destination codes, and the deciphering the enciphered service information with the deciphering key.
    • 一种包括多个接收站和信息服务设施的信息服务系统。 信息服务设备包括预先存储分配给接收站的接收站标识符的分配目的地信息集合的存储电路,存储电路内以预定顺序设置的分发目的地信息集,存储多个信息的存储电路 提供给接收站的加密电路,用于产生用于执行广播通信的组内的光接收站的加密密钥和用加密密钥加密服务信息的加密密钥,以及用于发送加密服务信息和服务目的地代码的电路 通过广播通信从分发目的地信息集合编码的服务目的地接收站。 每个接收站包括用于预先存储其自己的标识符和执行广播通信的组的分发目的地信息集的存储器电路,用于从信息服务设施接收加密服务信息和服务目的地代码的接收器单元,以及解密 电路,用于仅当所述接收站的自身标识符包含在所述服务目的地代码中时才产生与根据所接收的服务目的地代码和所述相应的和预先存储的分发目的地信息所设定的分发目的地信息相对应的解密密钥,以及 用解密密钥对加密的服务信息进行解密。
    • 9. 发明授权
    • Method for electronic transaction with digital signature
    • 数字签名电子交易方法
    • US5018196A
    • 1991-05-21
    • US375828
    • 1989-07-05
    • Kazuo TakaragiRyoichi Sasaki
    • Kazuo TakaragiRyoichi Sasaki
    • G06Q20/00G07F7/10H04L9/32
    • G06Q20/02G06Q20/00G06Q20/3823G06Q20/3825G06Q20/389G06Q20/401G07F7/1016H04L9/3236H04L9/3247H04L2209/56
    • A mediation can be requested to a computer connected to a communications network when transacting parties A and B effect an electronic transaction and trouble takes place during the transaction. The transaction is effected by a procedure where the transacting party B transmits its preliminary digital signature to the transacting party A. When the transacting party B agrees with the contract document M transacting part A has submitted, the transacting parties A and B exchange their formal signature with each other. These signatures are obtained by coding data including a hash total h(M) obtained by transforming the contract docmument M, identifiers of the transacting parties A and B and a data identifier indicating whether the data are prepared for the preliminary on the formal signature by the public key cryptosystem using a secrete key for one of the transaction parties. When a trouble takes place, the mediation organization decodes the signatures submitted by the transacting parties as evidences by using a public key and checks as the basic of h(M) and the identifiers of the transacting parties whether the evidence data concern the same transaction or not. Finally, it decides the sort of the signatures based on the data identifiers and deduces a conclusion of the mediation.
    • 当交易方A和B进行电子交易时,可以向连接到通信网络的计算机请求中介,并且在交易期间发生故障。 交易由交易方B将其初步数字签名传送给交易方A的过程来实现。交易方B同意交易A部分已经提交的合约文件时,交易方A和B交换其正式签名 与彼此。 这些签名是通过编码数据来获得的,该数据包括通过转换合同文档M,交易方A和B的标识符获得的哈希总数h(M)和指示数据是否准备好用于正式签名的初步的数据标识符 公钥密码系统使用一个交易方的分配密钥。 当发生故障时,调解组织通过使用公钥解密交易方提交的签名作为证据,并检查h(M)的基本以及交易方的标识符,证据数据是否涉及相同的交易, 不。 最后,它根据数据标识符来确定签名的类型,并推断出调解结论。
    • 10. 发明授权
    • Encrypting system of data
    • 加密数据系统
    • US4969190A
    • 1990-11-06
    • US336796
    • 1989-04-12
    • Kazuo TakaragiFusao NakagawaYasuhiko NagaiRyoichi Sasaki
    • Kazuo TakaragiFusao NakagawaYasuhiko NagaiRyoichi Sasaki
    • G09C1/00H04L9/06H04L9/26H04L9/28H04L9/30
    • H04L9/0637
    • A data encrypting system according to the CBC system involves a limitation in a range of a numerical value which expresses data (smaller than a predetermined integer N). The encrypting system has an encrypting apparatus including a block encrypting section for receiving data, which is expressed by an integer value X smaller than a predetermined integer value N, for executing a data conversionC=enc (X)where 0.ltoreq.C.ltoreq.N-1 using an RSA algorithm, and for outputting C; and an arithmetic operating section connected to receive data, as one input, which is expressed by an integer value M smaller than the integer value N, and the output C of the block encrypting section as the other input, for performing an arithmetic operation for both of the inputs so that a resultant arithmetic value is smaller than the integer value N, and for outputting the arithmetic value as an input of the block encrypting section. Further, a decoding apparatus has a block decoding section for receiving data which is expressed by an integer value C smaller than the integer value N, for executing an inverse conversionY=dec (C)of the encrypting for the input signal by using the RSA algorithm; and a modulo subtracting section for subtracing the input data C from the output Y of the block decoding section and for outputting a remainder M'M'=Y-C (mod N)which is derived by dividing a resultant subtracted value by the integer value N.
    • 根据CBC系统的数据加密系统涉及在表示数据(小于预定整数N)的数值范围内的限制。 加密系统具有加密装置,包括用于接收数据的块加密部分,该数据加密部分由小于预定整数值N的整数值X表示,用于执行数据转换C = enc(X),其中0 < / = N-1使用RSA算法,并输出C; 以及算术运算部,连接成作为一个输入,以小于整数值N的整数值M表示的数据和作为另一输入的块加密部的输出C,以进行两者的算术运算 的输入,使得所得到的算术值小于整数值N,并且用于输出算术值作为块加密部分的输入。 此外,解码装置具有块解码部分,用于接收由小于整数值N的整数值C表示的数据,用于通过使用RSA执行用于输入信号的加密的逆变换Y = dec(C) 算法; 以及用于从块解码部分的输出Y对输入数据C进行子跟踪的模减减部分,并且用于输出通过将合成的减法值除以整数值N而导出的余数M'M'= Y-C(mod N)。