Montgomery transform device, arithmetic device, IC card, encryption device, decryption device and program

    公开(公告)号:US20060126830A1

    公开(公告)日:2006-06-15

    申请号:US11151289

    申请日:2005-06-14

    申请人: Hideo Shimizu

    发明人: Hideo Shimizu

    IPC分类号: H04L9/28

    CPC分类号: G06F7/728 G06F2207/7219

    摘要: According to an aspect of the invention, Montgomery arithmetic can be achieved while omitting division in an input stage. That is, the aspect of the invention is configured to obtain a Montgomery transform result m′ (=mR mod p) of n-bit from an input m of 2n-bit without using the division, with using Montgomery reduction and Montgomery multiplication instead of conventional mod arithmetic and the Montgomery transform. Accordingly, Montgomery arithmetic can be achieved while omitting the division in the input stage.

    IC card, and method and program for preventing illegal use of IC card
    124.
    发明申请
    IC card, and method and program for preventing illegal use of IC card 失效
    IC卡,以及防止非法使用IC卡的方法和程序

    公开(公告)号:US20050045731A1

    公开(公告)日:2005-03-03

    申请号:US10965774

    申请日:2004-10-18

    IPC分类号: G06K19/073 G07F7/10 G06K19/06

    摘要: IC card receiving power from terminal and performing process, IC card comprises storage storing first identification information uniquely assigned to IC card, acquisition unit acquiring second identification information from terminal, first timer including first change unit whose state changes with lapse of time without power, state of first change unit changing from first initial state to final state via intermediate state, first timer outputting first signal indicative of changed state of first change unit when IC card receives power, comparison unit comparing second identification information with first identification information, determining whether second identification information and first identification information are identical, and providing first initializing signal according to at least one of determined results, and controller initializing first change unit to first initial state when receiving first initializing signal, controller further controlling IC card to make it inhibit process until state of first change unit changes to intermediate state.

    摘要翻译: IC卡从终端接收电力和执行处理,IC卡包括存储唯一地分配给IC卡的第一识别信息,获取单元从终端获取第二识别信息,第一定时器包括其状态随着时间的流逝随着时间的变化而没有电力状态 第一变化单元经由中间状态从第一初始状态改变到最终状态,当IC卡接收到电力时,第一定时器输出指示第一改变单元的状态的第一信号,比较单元将第二识别信息与第一识别信息进行比较,确定第二识别 信息和第一识别信息是相同的,并且根据确定的结果中的至少一个提供第一初始化信号,并且当接收到第一初始化信号时,控制器将第一改变单元初始化为第一初始状态,控制器进一步控制IC卡使其进入 hibit进程直到第一个更改单元的状态变为中间状态。

    Bathtub
    126.
    外观设计
    Bathtub 失效
    浴缸

    公开(公告)号:USD484955S1

    公开(公告)日:2004-01-06

    申请号:US29168057

    申请日:2002-09-24

    申请人: Hideo Shimizu

    设计人: Hideo Shimizu

    Process for producing aluminum-based composite member
    130.
    发明授权
    Process for producing aluminum-based composite member 失效
    铝基复合构件的制造方法

    公开(公告)号:US6006819A

    公开(公告)日:1999-12-28

    申请号:US44517

    申请日:1998-03-19

    CPC分类号: B22D19/00

    摘要: An aluminum-based composite member having an increased strength of bond between an aluminum-based body and a cast iron material portion which is incorporated into the aluminum-based body by casting is provided by an improved process. The following steps are employed in the process: a step of removing an oxide film on the surface of the cast iron material portion and activating such surface; a step of forming a protecting plated-layer having a thickness a in a range of 0.8 .mu.m.ltoreq.a.ltoreq.5 .mu.m on the surface of the cast iron material portion; a step of preheating the cast iron material portion in a reducing gas atmosphere and reducing an oxide on the surface of the protecting plated-layer; a step of vanishing the protecting plated-layer by a diffusing phenomenon and forming an aluminum-based alloy plated layer on the surface of the cast iron material portion by immersing the cast iron material portion into a molten aluminum-based alloy; a step of quenching the cast iron material portion in an inert gas atmosphere; and a step of incorporating the cast iron material portion into the aluminum-based body by casting.

    摘要翻译: 通过改进的方法提供了通过铸造而结合到铝基体中的铝基体和铸铁材料部分之间的结合强度增加的铝基复合构件。 在该方法中采用以下步骤:去除铸铁材料部分表面上的氧化膜并活化该表面的步骤; 在铸铁材料部分的表面上形成厚度a在0.8μm≤5μm范围内的保护电镀层的步骤; 在还原气体气氛中预热铸铁材料部分并还原保护镀层表面上的氧化物的步骤; 通过漫射现象消除保护电镀层的步骤,并且通过将铸铁材料部分浸入熔融的铝基合金中,在铸铁材料部分的表面上形成铝基合金镀层; 在惰性气体气氛中淬火铸铁材料部分的步骤; 以及通过铸造将铸铁材料部分结合到铝基体中的步骤。