METHOD FOR CONTROLLING SECURITY FUNCTION EXECUTION WITH A FLEXIBLE, ENTENDABLE, AND NON-FORGABLE BLOCK

    公开(公告)号:US20080077794A1

    公开(公告)日:2008-03-27

    申请号:US11534236

    申请日:2006-09-22

    摘要: A method, article, and system for providing an effective implementation of data structures, and application programming interface (API) functions that allow secure execution of functions behind a secure boundary. The controlling mechanism is a flexible, extendable, and non-forgeable block that details how values and parameters behind the secure boundary can be changed. The invention allows for one entity to execute a security function that will normally require extensive authorizations or dual or multiple control. The method and system comprise instructions that are cryptographically protected against alteration or misuse, wherein the instructions further comprise a trusted block that defines security policies that are permitted when an application program employs the trusted block in APIs. The trusted block has a number of fields containing rules that provide an ability to limit how the trusted block is used, thereby reducing the risk of the trusted block being employed in unintended ways. This trusted block controls the critical values or parameters behind the secure boundary. Cryptographically secured data structures are provided that allow for breaking up the instructions in the trusted blocks in a number of steps without reducing the level of security. Systems that make use of the trusted block must provide two API functions; one that encapsulates the block under at least dual control, and one that process the instructions or rules in the trusted block. In particular the invention provides a method, article, and system for the effective implementation for securely transferring symmetric encryption keys to remote devices, such as Automated Teller Machines (ATMs), PIN entry devices, and point of sale terminals. It may also be used to exchange symmetric keys with another cryptographic system of any type, such as a Host Security Module (HSM) in a computer server.

    Method of removing frozen material from a wiper
    74.
    发明授权
    Method of removing frozen material from a wiper 有权
    从刮水器去除冷冻材料的方法

    公开(公告)号:US6129093A

    公开(公告)日:2000-10-10

    申请号:US137129

    申请日:1998-08-20

    申请人: Michael J. Kelly

    发明人: Michael J. Kelly

    摘要: Various embodiments of a wiper assembly are disclosed which facilitate the removal by complete release or shattering of a frozen mass of ice or snow which has become merely trapped beneath a wiper blade during its movement. In particular, there is described a method and structures for removing such frozen masses by vibrating a wiper blade at high intensity of vibration. The vibrational intensity is normally measured when no frozen masses are present and causes at least parts of the wiper blade to move out of contact with the windshield.

    摘要翻译: 公开了一种擦拭器组件的各种实施例,其有助于通过完全释放冰块或冰块的完全释放或破碎,这些冰或雪在运动过程中仅被捕获在雨刷下方。 特别地,描述了通过在高振动强度下振动刮水片来去除这种冷冻物质的方法和结构。 通常在不存在冷冻质量时测量振动强度,并使刮水片的至少一部分与挡风玻璃脱离接触。

    Transducer/track alignment method for magnetic recording media
    75.
    发明授权
    Transducer/track alignment method for magnetic recording media 失效
    用于磁记录介质的传感器/轨迹对准方法

    公开(公告)号:US5367414A

    公开(公告)日:1994-11-22

    申请号:US208797

    申请日:1994-03-09

    IPC分类号: G11B5/584 G11B5/588 G11B5/56

    CPC分类号: G11B5/584

    摘要: A method of aligning a multiple transducer magnetic head with respect to a magnetic recording tape. Values related to the offset of each transducer from a reference location are determined, using reference signals on the tape. From these values the amount of compensation required to accurately position any particular transducer with respect to any track can be calculated. By a preferred selection of the reference for one such offset value, and by taking known design of the head into account, simplified processing of the values is possible.

    摘要翻译: 相对于磁记录带对准多个换能器磁头的方法。 使用磁带上的参考信号来确定与每个换能器与参考位置的偏移相关的值。 从这些值可以计算出相对于任何轨道精确定位任何特定换能器所需的补偿量。 通过对一个这样的偏移值的参考的优选选择,并且通过考虑头的已知设计,可以简化处理值。

    Crypotographic key version control facility
    77.
    发明授权
    Crypotographic key version control facility 失效
    CRYPOTOGRAPHIC KEY VERSION控制设备

    公开(公告)号:US5081677A

    公开(公告)日:1992-01-14

    申请号:US576562

    申请日:1990-08-31

    IPC分类号: G09C1/00 G06F12/14 H04L9/08

    CPC分类号: G06F12/1408

    摘要: A facility for making dynamic changes to a system master key without stopping the system, and without loss of integrity to ongoing cryptographic operations. A version number is generated and associated with the current master key. A dynamic change is made to the master key, resulting in the then current master key becoming the old master key, and a "new" current master key (with a new version number) being placed into operation. Subsequent cryptographic requests using a supplied key enciphered under the old master key are identified by means of a supplied version number associated with the supplied key. This identification triggers a reencipher operation, reenciphering the supplied key under the now current master key--after which the cryptographic operation proceeds. Unique patterns are generated to verify the contents of the master key registers, and to authorize normal use of the cryptographic facility, and issuers of key-change operations.

    Electronic devices
    79.
    发明授权
    Electronic devices 失效
    电子设备

    公开(公告)号:US4801982A

    公开(公告)日:1989-01-31

    申请号:US99060

    申请日:1987-09-21

    CPC分类号: H01L47/026

    摘要: A Gunn effect oscillator comprises a body of semiconductor material in which electrons are injected from one region to another region via a very thin intervening system. The thin region has a thickness which is less than the mean free electron path length and is typically of the order of 100 .ANG., which results in hot electrons being transferred from the injection region into the other region in which electron bunches form.

    摘要翻译: 耿恩效应振荡器包括半导体材料体,其中电子通过非常薄的中间系统从一个区域注入另一个区域。 薄区具有小于平均自由电子路径长度的厚度,并且通常为100埃数量级,这导致热电子从注入区域转移到其中形成电子束的另一区域。