ENCRYPTION SCHEME MANAGEMENT METHOD
    1.
    发明申请
    ENCRYPTION SCHEME MANAGEMENT METHOD 审中-公开
    加密方案管理方法

    公开(公告)号:US20070113095A1

    公开(公告)日:2007-05-17

    申请号:US11559459

    申请日:2006-11-14

    IPC分类号: H04L9/00

    摘要: An encryption scheme management method according to the present invention is an encryption scheme management method which manages encryption schemes utilized for distributing encrypted data, and includes request receiving which receives encryption scheme switching request from a client device, selecting an encryption scheme from the encryption schemes, generating circuit forming information for forming a decrypting circuit which decrypts the data encrypted by the selected encryption scheme, and sending the circuit forming information to the client device.

    摘要翻译: 根据本发明的加密方案管理方法是管理用于分发加密数据的加密方案的加密方案管理方法,并且包括从客户端设备接收加密方案切换请求的请求接收,从加密方案中选择加密方案, 生成电路形成信息,用于形成解密通过所选择的加密方案加密的数据的解密电路,并将电路形成信息发送到客户端设备。

    CONTENT PROTECTION SYSTEM, KEY DATA GENERATION APPARATUS, AND TERMINAL APPARATUS
    2.
    发明申请
    CONTENT PROTECTION SYSTEM, KEY DATA GENERATION APPARATUS, AND TERMINAL APPARATUS 有权
    内容保护系统,关键数据生成设备和终端设备

    公开(公告)号:US20080205652A1

    公开(公告)日:2008-08-28

    申请号:US12112670

    申请日:2008-04-30

    IPC分类号: H04L9/06

    摘要: A content protection system prevents illegal key acquisition, without checking uniqueness of device keys. The content protection system includes a key data generation apparatus and a user terminal. The key data generation apparatus converts first key data, which is for using content, based on a predetermined conversion rule, thereby generating second key data, encrypts the second key data using a device key held by valid terminals, and outputs the encrypted key data. The user terminal obtains the encrypted key data, decrypts the encrypted key data using a device key held by the user terminal, thereby generating second key data, converts the second key data based on a re-conversion rule corresponding to the conversion rule, thereby generating the first key data, and uses the content with use of the generated first key data.

    摘要翻译: 内容保护系统防止非法密钥获取,而不会检查设备密钥的唯一性。 内容保护系统包括密钥数据生成装置和用户终端。 密钥数据生成装置基于预定的转换规则,对使用内容的第一密钥数据进行转换,从而生成第二密钥数据,使用由有效终端保持的装置密钥对第二密钥数据进行加密,并输出加密的密钥数据。 用户终端获取加密的密钥数据,使用由用户终端保存的设备密钥解密加密的密钥数据,从而生成第二密钥数据,并根据与转换规则对应的重新转换规则转换第二密钥数据,从而生成 第一密钥数据,并使用所生成的第一密钥数据的内容。

    INFORMATION SECURITY DEVICE
    3.
    发明申请
    INFORMATION SECURITY DEVICE 有权
    信息安全设备

    公开(公告)号:US20090132821A1

    公开(公告)日:2009-05-21

    申请号:US11912473

    申请日:2006-04-24

    申请人: Natsume MATSUZAKI

    发明人: Natsume MATSUZAKI

    摘要: The present invention provides an apparatus for securely acquire a circuit configuration information set corresponding to a new cryptosystem without increasing the number of reconfigurable circuits. A content playback apparatus 100 includes an FPGA 122 that is reconfigurable. The content playback apparatus 100 stores a decryption circuit program that shows the structure of a decryption circuit that executes decryption in accordance with a prescribed cryptosystem. The FPGA is reconfigured in accordance with the program to configure the decryption circuit. The playback apparatus 100 acquires, from outside, an encrypted file that has been generated by encrypting a file including a decryption circuit program corresponding to the new cryptosystem in accordance with the prescribed cryptosystem, and decrypts the encrypted file by the decryption circuit.

    摘要翻译: 本发明提供一种用于安全地获取对应于新密码系统的电路配置信息集的装置,而不增加可重构电路的数量。 内容播放装置100包括可重新配置的FPGA 122。 内容再现装置100存储解密电路程序,其显示根据规定的密码系统执行解密的解密电路的结构。 根据程序重新配置FPGA以配置解密电路。 回放装置100从外部获取通过根据规定的密码系统加密包含与新密码系统对应的解密电路程序的文件而生成的加密文件,并且通过解密电路对加密文件进行解密。

    INFORMATION SECURITY DEVICE, INFORMATION SECURITY METHOD, COMPUTER PROGRAM, COMPUTER-READABLE RECORDING MEDIUM, AND INTEGRATED CIRCUIT
    4.
    发明申请
    INFORMATION SECURITY DEVICE, INFORMATION SECURITY METHOD, COMPUTER PROGRAM, COMPUTER-READABLE RECORDING MEDIUM, AND INTEGRATED CIRCUIT 有权
    信息安全设备,信息安全方法,计算机程序,计算机可读记录介质和集成电路

    公开(公告)号:US20100064142A1

    公开(公告)日:2010-03-11

    申请号:US12088028

    申请日:2006-10-18

    申请人: Natsume MATSUZAKI

    发明人: Natsume MATSUZAKI

    IPC分类号: G06F21/22

    摘要: The present invention aims to provide an information security apparatus that counters a simple power analysis attack (SPA) on an information security apparatus such as an RSA cryptosystem. The information security apparatus uses a multiplication with 1 in a Montgomery domain. 1 in the Montgomery domain is determined depending on a modulus and an integer k, which is greater than a number of bits of a modulus p. Therefore, it is hard for attackers who do not know p or k to analyze. Also, even if an analyzer can predict the Hamming weight, it is possible to further improve the safety against the SPA by modifying k or the modulus at random.

    摘要翻译: 本发明旨在提供一种在诸如RSA密码系统的信息安全装置上对简单功率分析攻击(SPA)进行计数的信息安全装置。 信息安全设备在Montgomery域中使用与1相乘的信息。 根据模数和大于模数p的位数的整数k确定蒙哥马利域中的1。 因此,不知道p或k的攻击者很难分析。 此外,即使分析仪可以预测汉明重量,也可以通过随机修改k或模数来进一步提高针对SPA的安全性。