Method and apparatus for calculating a polynomial multiplication, in particular for elliptic curve cryptography
    1.
    发明授权
    Method and apparatus for calculating a polynomial multiplication, in particular for elliptic curve cryptography 有权
    用于计算多项式乘法的方法和装置,特别是用于椭圆曲线密码术

    公开(公告)号:US08477935B2

    公开(公告)日:2013-07-02

    申请号:US11885827

    申请日:2006-03-06

    Abstract: Safeguarding communication channels is required in particular in wireless networks. The use of encryption mechanisms in the form of software is limited by the required calculation and energy capacities of mobile terminals. Costs are of significance when using hardware solutions for cryptographic operations. The present invention provides an approach which simultaneously tackles all those points. It concerns a hardware accelerator for polynomial multiplication in extended Galois fields (GF), wherein the per se known Karatsuba method is iteratively applied in accordance with the invention. When using the invention the area requirement can be reduced for example from 6.2 mm2 to 2.1 mm2. The solution according to the invention also reduces the energy consumption in comparison with solutions in accordance with the state of the art by 30%.

    Abstract translation: 特别是在无线网络中需要保护通信信道。 以软件形式使用加密机制受移动终端所需的计算和能量容量的限制。 使用硬件解决方案进行加密操作时,成本是非常重要的。 本发明提供了一种同时解决所有这些问题的方法。 它涉及在扩展伽罗瓦域(GF)中的多项式乘法的硬件加速器,其中根据本发明迭代地应用本身已知的Karatsuba方法。 当使用本发明时,面积要求可以从例如6.2mm2减小到2.1mm 2。 根据本发明的解决方案还将与根据现有技术的解决方案相比降低了30%的能量消耗。

    Method and device for detecting accidental arcs
    2.
    发明授权
    Method and device for detecting accidental arcs 失效
    检测意外弧的方法和装置

    公开(公告)号:US06873161B1

    公开(公告)日:2005-03-29

    申请号:US10276770

    申请日:2000-05-20

    CPC classification number: G01R31/1272

    Abstract: The invention relates to a method for detecting accidental arcs (arc tracking) on a cable (1), especially on a cable of an aircraft electrical system. According to said method, an alternating current signal (I(t)) that has been detected is sampled time-discretely and a trigonometric function (I(k)) imitating the alternating current characteristic is determined by interpolation of a number of sampling values (y(k)). The current alternating frequency (ω) is then derived from this trigonometric function. The result of a comparison of the current alternating current frequency (ω) and a set or reference frequency (ω′) is used to determine the presence of an accidental arc (ISA,IGA) and a warning signal (Sarc) is optionally generated. A device which functions according to this method is advantageously integrated into a circuit-breaker (7) for the aircraft electrical system, so that the latter is equipped to detect and deactivate accidental arcs that occur on the electrical system cable (1).

    Abstract translation: 本发明涉及一种用于检测电缆(1)上的意外电弧(电弧跟踪)的方法,特别是在飞机电气系统的电缆上。 根据所述方法,已经检测到的交流信号(I(t))被时间离散地采样,并且模拟交流特性的三角函数(I(k))由多个采样值的内插确定 y(k))。 然后从该三角函数导出当前交替频率(ω)。 使用当前交流频率(ω)和设定或参考频率(ω)进行比较的结果来确定是否存在意外电弧(ISA,IGA),并且可选地产生警告信号(Sarc)。 根据该方法起作用的装置有利地集成到用于飞机电气系统的断路器(7)中,使得后者被配备为检测和停用在电力系统电缆(1)上发生的意外电弧。

    Method and Apparatus for Calculating a Polynomial Multiplication, In Particular for Elliptic Curve Cryptography
    3.
    发明申请
    Method and Apparatus for Calculating a Polynomial Multiplication, In Particular for Elliptic Curve Cryptography 有权
    用于计算多项式乘法的方法和装置,特别是用于椭圆曲线密码术

    公开(公告)号:US20090136022A1

    公开(公告)日:2009-05-28

    申请号:US11885827

    申请日:2006-03-06

    Abstract: Safeguarding communication channels is required in particular in wireless networks. The use of encryption mechanisms in the form of software is limited by the required calculation and energy capacities of mobile terminals. Costs are of significance when using hardware solutions for cryptographic operations. The present invention provides an approach which simultaneously tackles all those points. It concerns a hardware accelerator for polynomial multiplication in extended Galois fields (GF), wherein the per se known Karatsuba method is iteratively applied in accordance with the invention. When using the invention the area requirement can be reduced for example from 6.2 mm2 to 2.1 mm2. The solution according to the invention also reduces the energy consumption in comparison with solutions in accordance with the state of the art by 30%.

    Abstract translation: 特别是在无线网络中需要保护通信信道。 以软件形式使用加密机制受移动终端所需的计算和能量容量的限制。 使用硬件解决方案进行加密操作时,成本是非常重要的。 本发明提供了一种同时解决所有这些问题的方法。 它涉及在扩展伽罗瓦域(GF)中的多项式乘法的硬件加速器,其中根据本发明迭代地应用本身已知的Karatsuba方法。 当使用本发明时,面积要求可以从例如6.2mm2减小到2.1mm 2。 根据本发明的解决方案还将与根据现有技术的解决方案相比降低了30%的能量消耗。

    Selectable filter assembly
    4.
    发明授权
    Selectable filter assembly 失效
    可选择的过滤器总成

    公开(公告)号:US4504390A

    公开(公告)日:1985-03-12

    申请号:US515099

    申请日:1983-07-19

    Applicant: Peter Steffen

    Inventor: Peter Steffen

    Abstract: A filter arrangement has two hollow, coaxial, cylindrical filter elements, one of which is closed at one end and the other of which is connected to a clean fluid outlet. The outsides of the filter elements are separated from each other by an intermediate ring. A three-way valve is operable by an operating member to connect an inlet for the raw fluid to either or both of first and second filter elements. A control member operates valves for opening and closing an outlet for dirty fluid is operated at the same time with the three-way valve, dependent on its position. Both filter elements can be used simultaneously for filtering and also flow can be reversed through either filter element.

    Abstract translation: 过滤器装置具有两个中空的同轴圆柱形过滤器元件,其中一个在一端封闭,另一个连接到清洁的流体出口。 过滤元件的外侧通过中间环彼此分离。 三通阀可由操作构件操作,以将原始流体的入口连接到第一和第二过滤器元件中的任一个或两者。 控制构件操作用于打开和关闭出口的阀,用于脏液体与三通阀同时操作,取决于其位置。 两个过滤器元件可以同时用于过滤,也可以通过任何一个过滤器元件反向流动。

    Arrangement for locating below-ground ammunition
    5.
    发明授权
    Arrangement for locating below-ground ammunition 失效
    定位地下弹药的安排

    公开(公告)号:US5452639A

    公开(公告)日:1995-09-26

    申请号:US166343

    申请日:1993-12-15

    CPC classification number: G01V3/15 F41H11/16

    Abstract: In order to be able to automatically locate and map ammunition over a large area without endangering the searching crew, ground-scanning sensors are mounted on a relatively light-weight, unmanned, remote-controlled vehicle which then travels over the area contaminated with ammunition. The controlled vehicle is controlled from, and the sensor signals are evaluated in, a second vehicle which is generally disposed in the immediate vicinity of the area being examined. The controlling vehicle, which is preferably armored, also accommodates the operating crew.

    Abstract translation: 为了能够在大面积上自动定位和映射弹药,而不危及搜索队员,地面扫描传感器安装在相对较轻的无人驾驶的遥控车上,然后在被弹药污染的区域上行驶。 受控车辆由通常设置在被检查区域附近的第二车辆进行控制,传感器信号被评估。 优选装甲的控制车还容纳操作人员。

    Data transmission arrangement including a reconfiguration facility
    6.
    发明授权
    Data transmission arrangement including a reconfiguration facility 失效
    数据传输装置包括重新配置设施

    公开(公告)号:US4723241A

    公开(公告)日:1988-02-02

    申请号:US756201

    申请日:1985-07-18

    CPC classification number: H04L12/437

    Abstract: The construction of an arrangement for data transmission between a number of interconnection units should be realized so that, after a disturbance, an extensive reconfiguration of the arrangement is possible, so that all interconnection units which still communicate via a connection are interconnected by means of transmission paths which merely follow a different course in comparison with the non-disturbed state. In accordance with the invention each interconnection unit is provided with a device for generating synchronization information and in the case of a disturbance, appearing as a breakdown of the normal data stream, all interconnection units enter a test state in which test information is transmitted and possibly received test information is returned via all connections. Consequently, in each interconnection unit it can be autonomously decided which data paths are to be interconnected. In the case of at least three data connections per interconnection unit, different configurations are feasible which enable a complete reconfiguration to be realized also in the case of multiple disturbed connections between the interconnection units.

    Abstract translation: 应该实现在多个互连单元之间进行数据传输的结构的构造,使得在干扰之后,布置的广泛重新配置是可能的,使得仍然通过连接进行通信的所有互连单元通过传输互连 与不受干扰的状态相比,仅跟踪不同路线的路径。 根据本发明,每个互连单元设置有用于产生同步信息的装置,并且在出现作为正常数据流的故障的干扰的情况下,所有互连单元进入发送测试信息的测试状态,并且可能 通过所有连接返回接收的测试信息。 因此,在每个互连单元中,可以自主地决定哪些数据路径将被互连。 在每个互连单元具有至少三个数据连接的情况下,不同的配置是可行的,这使得在互连单元之间的多个被干扰的连接的情况下也能实现完全重新配置。

    Antenna for a submarine vessel
    7.
    发明授权
    Antenna for a submarine vessel 失效
    潜艇的天线

    公开(公告)号:US4543582A

    公开(公告)日:1985-09-24

    申请号:US584411

    申请日:1984-02-28

    CPC classification number: B63G8/42 H01Q1/04

    Abstract: For radio communication with submarine vessels frequency ranges with very low frequencies are used. Even at these frequencies the penetration depth in salt water is only approximately 10 to 20 meters. In order to improve the signal noise ratio or to extend the submerging depth use is made of buoy antennas connected to the submarine vessel by a cable. In order to improve the manoeuvrability of the submarine vessel and to avoid the use of an active control system in the antenna, the antenna is constructed as a torpedo-like hollow body, which at the trailing part is equipped with two hydrofoils resembling a horizontal tail unit, which hydrofoils interconnect the top and bottom of the body to each other as an open arc. Both in the floating body and in the hydrofoils a loop of a crossed-loop antenna is incorporated, which loops are tuned in order to increase the sensitivity. Signal transmission to the submarine vessel is effected via an optical fibre guide, which also transmits the traction force.

    Abstract translation: 对于与潜艇的无线电通信,使用频率非常低的频率范围。 即使在这些频率下,盐水中的穿透深度只有大约10到20米。 为了提高信号噪声比或延长淹没深度,使用由电缆连接到潜艇的浮标天线。 为了提高潜艇的机动性,并避免在天线中使用主动控制系统,天线被构造为鱼雷状的中空体,在尾部装有两个类似水平尾翼的水翼 单元,其水翼将主体的顶部和底部彼此连接成开放的弧。 在浮体和水翼中都嵌有一个交叉环形天线的环路,为了提高灵敏度,调整了这些回路。 通过光纤引导件对潜艇进行信号传输,该光纤引导件还传递牵引力。

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