Abstract:
Um mit vergleichsweise geringem Aufwand und insbesondere ohne die Notwendigkeit zusätzlicher Einrichtungen echte Zufallszeichenfolgen generieren zu können, wird ein Verfahren vorgeschlagen, bei dem folgende Schritte durchgeführt werden: ein Computerprogramm (11a, 11b, 28a - 28d), das für seinen Ablauf eine Zufallszeichenfolge benötigt, sendet eine erste Anfrage an eine Zufallszeichenverwaltungseinrichtung (13, 27) einer Datenverarbeitungseinrichtung (10, 21); als Reaktion auf die erste Anfrage erzeugt die Zufallszeichenverwaltungseinrichtung (13, 27) eine zweite Anfrage an eine Servereinrichtung (16, 25), die für zumindest einen geografische Position aktuelle Wetterdatenwerte zur Verfügung stellt; die Servereinrichtung (16, 25) sendet zumindest einen aktuellen Wetterdatenwert als Antwort auf die zweite Anfrage an die Zufallszeichenverwaltungseinrichtung (13, 27); die Zufallszeichenverwaltungseinrichtung (13, 27) erzeugt aus dem zumindest einen übermittelten Wetterdatenwert zumindest eine Zufallszeichenfolge und stellt diese dem Computerprogramm bereit (11a, 11b, 28a - 28d). Die Erfindung betrifft auch eine entsprechende Datenverarbeitungseinrichtung.
Abstract:
The present invention relates to a method and system for generating random numbers. The method for generating random numbers comprises the following steps: (a) generating a plurality of first random number samples; (b) assigning relative priority values to each of the first random number samples, wherein a common difference exists between neighboring priority values when the relative priority values are sorted in an ascending order or in a descending order; and (c) converting the first random number samples into respective second random number samples on the basis of the relative priority values. According to the present invention, the second random number samples are those converted into mathematical expectations which can be generated from the relative priority values. The method and system of the present invention can generate a plurality of random number samples having a distribution that is closest to the theoretical mean value and variance value, or having a uniform distribution.
Abstract:
L'invention concerne un procédé de génération d'aléas non déterministes par des moyens informatiques, dans lequel on augmente la fréquence de fonctionnement d'au moins une partie desdits moyens informatiques, au moins jusqu'à ce qu'une erreur en sortie des moyens dont on a augmenté la fréquence de fonctionnement soit détectée.
Abstract:
System and method of generating a one-way function and thereby producing a random-value stream. Steps include: providing a plurality of memory cells addressed according to a domain value wherein any given domain value maps to all possible range values; generating a random domain value associated with one of the memory cells; reading a data value associated with the generated random domain value; generating dynamically enhanced data by providing an additional quantity of data; removing suspected non-random portions thereby creating source data; validating the source data according to a minimum randomness requirement, thereby creating a validated source data; and integrating the validated source data with the memory cell locations using a random edit process that is a masking, a displacement-in-time, a chaos engine, an XOR, an overwrite, an expand, a remove, a control plane, or an address plane module. The expand module inserts a noise chunk.
Abstract:
Provided is a semiconductor chip to generate an unique identification key. The semiconductor chip (100) includes a first inverter (110) having a first logic thresholdpa second inverter (120) having a second logic threshold, and a first switch (130). The first switch (130) includes a first terminal and a second terminal, and may short or open a connection between the first terminal and the second terminal according to a first input voltage value. An input terminal of the first inverter (110), an output terminal, and the first terminal of the first switch (130) are connected to a first node (101 ). An output terminal of the first inverter (110), an input terminal of the second inverter (120), and the second terminal of the first switch (130) are connected to a second node (102). A second switch (150) and a third switch (140) may also be embodies using a transmission gate TG.
Abstract:
Methods for code-division multiplex communications. The methods involve generating orthogonal or statistically orthogonal chaotic spreading codes (CSC 1 ,..., CSC K ) using different sets of polynomial equations (f o (x(nT)),..., f N-1 ,(x(nT))), different constant values (Co, Ci,..., C N-1 for the polynomial equations, or different sets of relatively prime numbers (ρ o , p i ,..., p N-1 ) as modulus (m 0 , m 1 ,..., m N-ι ) in solving the polynomial equations. The methods also involve forming spread spectrum communications signals using the orthogonal or statistically orthogonal chaotic spreading codes, respectively. The methods further involve concurrently transmitting the spread spectrum communications signals over a common RF frequency band.
Abstract:
A method of measuring a very low frequencycomponent of a signal is described. The method comprises sampling the signal at random timesto generate a "decimated" signal, and then filtering the decimated signal using a low-passfilter. There are many different methods which may be used to sample the signal at random times, and in one example, a sample of the signal may be taken and then passed to the low-passfilter with a probability of1/M, where M is the decimation factor.
Abstract:
A seed for use in a cryptographic operation for an electronic device is determined by estimating the number of entropy data bits needed to satisfy a predetermined security strength of the cryptographic operation. The estimation is based on an entropy strength of a string of entropy data bits. Entropy strength is a measure of randomness. Furthermore, guiding a determination of the seed differently according to the estimated number of entropy data bits may be performed.
Abstract:
A communications apparatus includes a mobile device. The apparatus includes a receiver for receiving at the mobile device a plurality of signals carrying information including received signals which provides randomly varying data related to location of the mobile device. The apparatus includes a random number generator which generates a random number as a function of the data. The apparatus includes a cryptographic key generator which generates a cryptographic key using the random number. A method to establish at a mobile device a random number for cryptographic operations includes the steps of receiving at the mobile device a plurality of signals carrying information including received signals which provides randomly varying data related to location of the mobile device. There is the step of estimating signal entropy for at least one of the received signals in dependence of location where the signals are received by the mobile device. There is the step of selecting the at least one entropy estimated signal having estimated entropy satisfying a predetermined property. There is the step of generating from the at least one entropy estimated signal the random number.