中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.025 seconds)

    Method and apparatus of generating a chaos-based pseudo-random sequence
    21.
    发明公开
    Method and apparatus of generating a chaos-based pseudo-random sequence 审中-公开
    Verfahren und Vorrichtung zur chaotischen Erzeugung einer Pseudozufallsfolge

    公开(公告)号：EP1420542A1

    公开(公告)日：2004-05-19

    申请号：EP02425689.3

    申请日：2002-11-12

    Applicant: STMicroelectronics S.r.l.

    Inventor： Kocarev, Ljupco ,  Amato, Paolo ,  Rizzotto, Gianguido

    IPC: H04L9/00 ,  H04L9/18

    CPC classification number: H04L9/001 ,  G06F7/582 ,  H04L9/0662 ,  H04L2209/20

    Abstract: A method of generating cryptographically secure (or unpredictable) pseudo-random numbers uses simple functions whose inverse is not a well-defined function and has a large number of branches, although the inverse could be easily computed on each particular branch. In this way the sequence of numbers is practically unpredictable and at the same time may be generated using very simple functions.
    A hardware generator of chaos-based pseudo random bit sequences implementing an embodiment of the method comprises:

    ― circuit means for storing bit strings representing integer numbers of the pseudo-random sequence;
    ― a shift register coupled to the circuit means;
    ― a command circuit generating shift commands for the shift register;
    ― second circuit means for storing the bits output by the shift register;
    ― an adder modulo 2 summing the bits stored in the second circuit means, generating a bit of the chaos-based pseudo-random bit sequence;
    ― a second adder summing up the bit strings currently stored in the shift register and in the first circuit means, generating a bit string representing a successive number of the pseudo-random sequence.

    Abstract translation: 生成加密安全（或不可预测）伪随机数的方法使用简单函数，其逆不是定义明确的函数并且具有大量分支，尽管可以在每个特定分支上容易地计算逆。 以这种方式，数字序列实际上是不可预测的，并且同时可以使用非常简单的功能来产生。 实现方法实施例的基于混沌的伪随机比特序列的硬件生成器包括：用于存储表示整数的伪随机序列的比特串的电路装置; 耦合到电路装置的移位寄存器; 产生移位寄存器的移位指令的指令电路; 第二电路装置，用于存储由移位寄存器输出的位; 加法器2对存储在第二电路装置中的位进行求和，产生基于混沌的伪随机比特序列的比特; 第二加法器，对当前存储在移位寄存器和第一电路装置中的位串相加，生成表示连续数量的伪随机序列的比特串。

    Chaos-based block encryption
    23.
    发明公开
    Chaos-based block encryption 审中-公开
    Auf Chaos basierendeBlockverschlüsselung

    公开(公告)号：EP1326363A1

    公开(公告)日：2003-07-09

    申请号：EP01130846.7

    申请日：2001-12-27

    Applicant: STMicroelectronics S.r.l.

    Inventor： Kocarev, Ljupco ,  Jakimoski, Goce ,  Rizzotto, Gianguido ,  Amato, Paolo

    IPC: H04L9/00 ,  H04L9/06

    CPC classification number: H04L9/001 ,  H04L9/002 ,  H04L9/0618 ,  H04L2209/24

    Abstract: In an encryption/decryption system for converting data signals between an unencrypted plaintext format and an encrypted ciphertext format plurality of round modules are provided (10) permitting a respective set of input data signals (TEXT IN) to generate a respective set of output data signals (TEXT OUT) by means of transformation controlled by a round key (SUBKEY). The transformation is identified by at least one map function derived from a chaotic map (14).

    Abstract translation: 在用于在未加密明文格式和加密密文格式之间转换数据信号的加密/解密系统中，提供多个圆形模块（10），允许各组输入数据信号（TEXT IN）产生相应的一组输出数据信号 （TEXT OUT）通过由循环密钥（SUBKEY）控制的变换。 通过从混沌映射导出的至少一个地图函数来识别转换（14）。

    Method for generating a random number sequence and a relative random bit generator
    24.
    发明公开
    Method for generating a random number sequence and a relative random bit generator 审中-公开
    一种用于生成随机数序列和相对Zufallbitgenerators方法

    公开(公告)号：EP1320026A1

    公开(公告)日：2003-06-18

    申请号：EP01830764.5

    申请日：2001-12-13

    Applicant: STMicroelectronics S.r.l.

    Inventor： Kocarev, Ljupco ,  Stojanovski, Toni ,  Rizzotto, Gianguido ,  Italia, Francesco ,  Porto, Domenico

    IPC: G06F7/58

    CPC classification number: H04L9/0861 ,  G06F7/588

    Abstract: A method for generating a random number sequence whose randomness properties are determined a priori , comprises the steps of defining a parametric map; calculating, in function of parameters of the map, the entropy and the Lyapunov exponent of random number sequences obtainable using the parametric map; identifying at least a set of values of parameters for which the entropy and the Lyapunov exponent are positive numbers the map has no attracting point; assigning a pre-established value as a first feedback value and carrying out cyclically the following steps for generating a random number sequence:

    (i) determining said parameters inside the set as the numerical values of respective physical quantities;
    (ii) outputting a random number, according to said map with the parameters and the assigned feedback value;
    (iii) assigning as new feedback value said output random number.

    A circuit, preferably realized using a switched current technique, implements the method of the invention for generating a random bit sequence.

    Abstract translation: 一种用于生成随机数序列的随机性谁的性质是确定开采先验方法包括定义一个参数图的步骤; 计算，在地图的参数的功能，熵和随机数的Lyapunov指数序列可获得的使用参数图; 确定至少一组为其熵和Lyapunov指数为正数的映射没有吸引点的参数值; 分配预先建立的值作为第一反馈值并进行循环，用于产生一个随机数序列以下步骤：（i）确定的采矿所述设定为物理量respectivement的数值内部参数; （二）输出廷一个随机数，gemäß到所述地图的参数和所分配的反馈值; （三）分配作为新的反馈值，所述输出随机数。 使用开关电流技术的电路，优选地实现，实现本发明的用于产生随机位序列的方法。

    Method and device for controlling semiactive suspensions of motor vehicles
    27.
    发明公开
    Method and device for controlling semiactive suspensions of motor vehicles 有权
    Vorrichtung und Verfahren zur Regelung semaktiverAufhängungenvon Fahrzeugen

    公开(公告)号：EP1063108A1

    公开(公告)日：2000-12-27

    申请号：EP99830395.2

    申请日：1999-06-24

    Applicant: STMicroelectronics S.r.l.

    Inventor： Rizzotto, Gianguido ,  Caponetto, Riccardo ,  Diamante, Olga

    IPC: B60G17/015

    CPC classification number: B60G17/0182 ,  B60G2400/10 ,  B60G2400/102 ,  B60G2400/202 ,  B60G2400/252 ,  B60G2500/102 ,  B60G2600/1879

    Abstract: A vehicle comprises at least one semiactive suspension (5) arranged between a vehicle body (2) and a wheel (4) and having a damping coefficient that can be varied in a controlled way by an actuator (14) governed by a control device (18). The control device comprises an accelerometric sensor (15) generating a vehicle body acceleration signal; a potentiometer (16) generating a suspension position signal; a signal conditioning unit (21) for the calculation of the vehicle body speed and the damping speed; a fuzzy control unit (23) which calculates the subsequent position of the actuator on the basis of the vehicle body speed and of the damping speed; and a driving unit (21) which generates a control signal (S1) for the actuator.

    Abstract translation: 一种车辆包括布置在车身（2）和车轮（4）之间的至少一个半主动悬架（5），并且具有阻尼系数，所述阻尼系数可以由控制装置（14）控制的致动器（14）以受控的方式变化 18）。 控制装置包括产生车身加速度信号的加速度传感器（15） 产生悬挂位置信号的电位计（16）; 用于计算车体速度和阻尼速度的信号调节单元（21）; 模糊控制单元（23），其基于车体速度和阻尼速度来计算致动器的后续位置; 以及产生用于致动器的控制信号（S1）的驱动单元（21）。

Patent Agency Ranking