1276results about How to "Increase randomness" patented technology

The computer associated with each of a potentially large number of end users is harnessed to provide a massively-distributed mechanism for finding the nearest neighbors of each user, according to tastes and / or interests. Once these nearest neighbors are determined, there taste or and / or interest profiles are leveraged for highly accurate recommendations, and their online addresses are leveraged for community purposes.

A programmable card handling machine with a display and appropriate inputs for adjusting the machine to any of a number of games comprises inputs including a number of cards per hand selector, a card game selector, a number of hands delivered selector and a trouble-shooting input. These features also provide for interchangeability of the apparatus for many different games, for many types of cards or decks and in different locations thereby reducing the number of back-up machines or units required at a casino. The display may include a game mode or game selected display, and use a cycle rate and / or hand count monitor and display for determining or monitoring the usage of the machine. The card-handling machine is capable of randomly selecting numbers of cards to be delivered in a hand of cards to players and the dealer during a round of a casino table card game.

The multiple-inlet shuffling machine has a shuffler and at least two card inputs. The shuffler has a base, a shuffling wheel mounted rotatably on the base and has multiple card slots formed radially around which, and a controller having at least one random number generator (RNG) that generates at least one random number. The card inputs are mounted oppositely on the base of the shuffler adjacent to the shuffling wheel and are controlled by the at least one random number generator (RNG) of the controller to randomly place cards into a same wheel further raising a randomness of the cards. relative to a number of compartments to number of cards ratio. Furthermore, operations are made via gears, so the multiple-inlet shuffling machine has improved precision of movement.

A transmission and updating method and the apparatus thereof for consecutive changing data. The method comprising the steps: the server extracts the data set from the consecutive changing data at the predetermined time interval consecutively (101); the server compares the whole set of the latest data set with the whole set of the prior one in the form of symbol to obtain the changing string; vary the changing string to the changing set (102); transmit the changing set to one or more clients (103) so that the clients can update the data set to the latest data set according to the current data set (104). The method of the present invention divides the data set into several symbols, as the symbol is flexible, an item can be divided into multiple symbols, and the data sets are compared with the symbol as a unit to diminish the compared unit, so the byte length of the obtained changing string is reduced, such that the transmission quantity is reduced greatly, the transmission speed is increased and the requirement for bandwidth is reduced.

System and method for generating, disseminating, controlling, and processing limited-life security codes used to authenticate users, particularly for electronic financial transactions, such as payment transactions or interacting with automated teller machines and the like. Providing a user with a single security code usable across multiple accounts or other secured systems is contemplated, each security code having a limited lifetime (e.g., one day). In a particular example of the present invention, a plurality of similarly situated users (each needing authenticated access to a plurality of accounts or other secured systems using the security code) are each assigned a set or group of respective security codes. In a preferred example, each security code is a random number from a random number generator. The respective security codes for each user correspond to a respective security code validity period of limited duration. Thus, a table or matrix that associates the plurality of users with the respective sets of randomly selected security codes (each having their respective validity periods) is generated, and that matrix is provided to the respective entities (such as banks, payment processors, computer networks generally, etc.) to which each user requires secured access. In parallel, at least a current security code (for example, for the current validity period) is provided to each user, and this is how the respective entities being accessed can track which code from which user is currently valid.

A push side pool cleaner (1) has a spheroidal overall shape, within this shape two outer segments (9, 10) serve as wheels and a central zone (8) carries a suction passage (33) and a debris collector (32) also located entirely within the overall shape. The wheels are driven directly by water jets (44, 45) without any gears or other transmission. A flow splitter is provided in the cleaner (1) to divide push side water flow between the jets (44, 45) which drive the wheels and jets (43) which provide impulsion to the suction passage (33).

A therapy device, in its preferred embodiment, incorporates a chaos signal generator into a therapeutic massager for the purpose of increased therapeutic effectiveness in such areas as pain management, inducing calm, increasing mental clarity, interrupting repeating thoughts and emotions, and enhancing states of human awareness, such as mental analysis and intuitive functioning, by applying specific frequency bands of a highly unpredictable chaotic signal.

There are disclosed an extended key generator, encryption / decryption unit, and storage medium, in which as each of key transform functions, a transform process is done by an S box (substitution table) on the basis of a first key obtained from the inputted key, and an adder computes a corresponding one of extended keys on the basis of a value obtained by shifting the transformed result of the S box to the left, and a second key obtained from the inputted key.

The invention relates to a semiconductor laser, in particular to a no-time-delay flat-frequency-spectrum broadband photon integrated chaos semiconductor laser which solves the problems that chaos lasers generated by an existing semiconductor laser have the time delay characteristic, the signal band width is small, and the frequency spectrum is not flat. The no-time-delay flat-frequency-spectrum broadband photon integrated chaos semiconductor laser comprises a chip substrate, an optical waveguide, an erbium-doped passive optical waveguide, a left distributed feedback semiconductor laser chip, a no-isolation two-way amplified semiconductor light amplification chip, a right distributed feedback semiconductor laser chip and a high-speed photoelectric detection chip. The no-time-delay flat-frequency-spectrum broadband photon integrated chaos semiconductor laser is suitable for the fields of synchronization of chaos, secrecy light communication, high-speed random number secret key generation, laser radar, optical fiber network fault detection, ultra broadband technology, distributed optical fiber sensing and the like.

The invention provides an attack-proof DES encryption method and an encryption chip, relating to the information security technical field. The encryption chip comprises a memory interface module for the chip input and output, the data bit transformation and comprising each register and an encryption engine DES Mask of the DES decryption operation for realizing the DPA attack proof; an output signal and an input signal of the encryption engine are respectively connected to a corresponding register. The encryption method comprises the following steps that: 1) in the process of clear-text input, a uniform random number of x is used to Mask; 2) the standard DES operation is completed including the XOR operation of a round key generated by the mask of the Key of a Mask Key and the operation of the replacement of a modified S-box; 3) when the result is outputted, the calculation result of the DES is obtained when the uniform random number of x is XOR. The invention can effectively avoid the SPA attack, the DPA attack and the high-order DPA attack.

A technique for creating a tamper-resistant machine identifier is disclosed. A file is created with a set of file blocks having random locations. Each block is identified by an object identifier that represents the block's location. A machine identifier is created based on the object identifiers of the file blocks. Machine-identifier-dependent software (i.e., software that is designed to perform its function only in the presence of a particular machine identifier) is created and loaded into the file. The software has the machine identifier embedded within itself, and checks the object identifiers of the file in which it is stored against the embedded machine identifier prior to performing its functions. The software may, in one example, be rights-management software that is adapted to allow commercially valuable content to be rendered only on a particular device having a particular machine identifier.

The invention discloses an optical feedback chaos laser which comprises a continuous feedback cavity, wherein the continuous feedback cavity is a scatterer for singly providing continuous backward scattering, or a scatterer for providing and amplifying the continuous backward scattering; the scatterer for singly generating the continuous backward scattering is one of optical fiber, film waveguideand strip waveguide; the scatterer for providing and amplifying the continuous backward scattering is a combination of doped optical fiber and a pump laser; and the doped optical fiber is one of erbium-doped optical fiber, praseodymium-doped optical fiber and rubidium-doped optical fiber. The continuous feedback cavity of the optical feedback chaos laser generates chaotic laser light, thoroughly eliminates the time delay characteristic of an optical feedback semiconductor laser, improves confidentiality of chaotic communication, accuracy of distance measurement and randomness of random numbers, and can be applied in the fields of communication, remote sensing, sensing and the like.

The invention provides a cooperative air combat firepower distribution method based on an improved multi-target leapfrog algorithm and belongs to the technical field of computer simulation and method optimization. The method comprises the steps that firstly, required data information is obtained through a cooperative air combat formation command and control system; secondly, a multi-target optimization module of cooperative air combat firepower distribution is established; then a multi-target quantum leapfrog algorithm based on a self-adaptive mesh method is carried out, and a Pareto non-inferior solution of firepower distribution problem is solved; finally, rules can be selected independently according to the optimal distribution scheme, and the optimal firepower distribution scheme is selected from the non-inferior solution. The cooperative air combat firepower distribution method based on the improved multi-target leapfrog algorithm has the major functions that weapons on a fighter aircraft on an attack mission are distributed to multiple targets according to the optimal firepower distribution scheme, the formed cooperative air combat is enabled to realize the optimal cooperative attack effect, and the maximum operational effectiveness is obtained.

A data encryption and decryption method and an apparatus thereof, and a communication system are disclosed. The data encryption method comprises the following steps of segmenting data to be encrypted and generating a segmented data; aiming at the data to be encrypted, randomly selecting an encryption algorithm; randomly generating a secret key corresponding to the encryption algorithm; using the encryption algorithm and the secret key to encrypt the data to be encrypted so as to acquire the encrypted segmented data; packing the encrypted segmented data to acquire an encrypted segmented data block; and combining and packing the encrypted segmented data block to acquire a final cryptograph. By using the encryption method, cracking difficulty is increased and safety of the data encryption method is increased.

A data compression method, to generate a compressed data stream from an uncompressed data stream, enhances the secrecy of data compression. A scramble value is appended to the beginning of the uncompressed data stream, and a dynamic variable-length encoding method is used to perform data compression. Compressed data with high randomness can be generated, and data for processing can easily be randomized. That is, there is no need to share a common initial value on the generating side and on the restoring side, processing is simple, and the processing time can be shortened.

A separable combined toy spinning top, comprising a main spinning top and an auxiliary spinning top, wherein the main spinning top comprises a spinning top cover (1), a main spinning top piece (2), a spinning top shaft sleeve (3) and a spinning tip (4); the auxiliary spinning top comprises an auxiliary spinning top piece (5), a shaft sleeve body (6) and the spinning tip (4). The upper part of the auxiliary spinning top is provided with an elastic mechanism, and the main spinning top, flexibly connected onto the top of the auxiliary spinning top, is capable of disconnecting from the auxiliary spinning top and ejecting away via the elastic mechanism when hindered during rotation so that the main spinning top and the auxiliary spinning top rotate independently of each other. The separable combined toy spinning top cleverly combines two spinning tops into one, able to be separated upon impact, so that a player has a higher probability of winning in a competition while the practical abilities of a child can be developed.

The invention relates to a token, to an integrated circuit comprising the token, to a method of randomizing the token and a system for randomizing the token. The token comprises a physical unclonable function and comprising probing means for probing the physical unclonable function. The physical unclonable function comprises a capacitor comprising a dielectric medium being arranged at least partially between the electrodes of the capacitor. The dielectric medium is configured for contributing to a capacitance value of the capacitor and comprises conducting particles substantially randomly dispersed in the dielectric medium. The conducting particles comprise a phase changeable material being changeable between a first structural state having a first conductivity and a second structural state having a second conductivity different from the first conductivity.

A metering and charging system of electric energy consists of four parts of data collection, data management, network browse and electronic report. It is featured as using data collection unit and data management unit to form databank for application, using network browse unit to browse data in databank and using electronic report unit to print out required data. The system has unified data platform being able to obtain remote electric energy data and it can ensure uniqueness, completeness and correctness of the data.

The invention relates to the technical field of circuits and discloses a true random number generator. The true random number generator comprises a random signal generation source circuit, a true random number generation circuit, a PRNG (pseudo random number generator) and a random number interceptor, wherein the random signal generation source circuit is used for generating random number generation source signals; the true random number generation circuit is used for sampling and diffusing the random number generation source signals and a true random number sequence is obtained; the PRNG is used for outputting the serial or parallel random number sequence according to the input true random number sequence; the random number interceptor is used for intercepting the random number sequence of the preset length from the random number sequence output from the PRNG according to the input true random number sequence and feeding back the intercepted random number sequence to the random signal generation source circuit; the random signal generation source circuit is used for adjusting the random number generation source signals according to the random number sequence fed back by the random number interceptor. The true random number generator can be realized through an ordinary logic device, the circuit structure is simple, the true random number generator is independent of the process and has good reusability, and a feedback mechanism is added, therefore, pseudo-randomness due to long-time working without feedback can be eliminated.

The present invention relates to a ture random number generator based on oscillator. It is formed from the following components: slow clock generator, quick clock generator, sample hold circuit and postprocessor. Said invention also provides the concrete action of the above-mentioned every component, and working principle of said ture random number generator and its application.

The invention relates to a device and method for producing a truth random number; the device comprises a single photon random pulse source, a clock unit, a random bit extracting module based on an FPGA (field programmable gate array) and a computer; the random bit extracting module based on the FPGA comprises a controller, a counter, a multi-bit FIFO (first in first out) memory, a buffer unit, a comparator, 1-bit FIFO memory and a communication interface control module; the buffer unit comprises a first register and a second register. The technical problem that the current random number has great randomness, slow speed and bad stability is solved; and the random bit extracting method is circular, continuous, unlimited and high-speed.

Through designing encoder for paralleled convolution codes (LDPC), the method carries out encoding, and obtains check matrix H for LDPC code. The encoding procedure is as following: grouped information sequence is stored in memory; through different random interleaving units, the interleaved information sequence is sent to corresponding modulus 2 and processing unit to carry out precoding; then check bit obtained from the precoding is sent to different convolutional coders of recursion to carry out convolutional coding; finally, recombination of check bit outputted from convolutional coders and information bit in memory creates LDPC code words with code rate Rú¢M / (M+N), code length as (M+N)L. Under condition of ensuring performance, the method realizes encoding in high speed. Features are: lower memory space needed, and flexible design and application.

The invention provides a quantum random number generator based on an amplified vacuum state. The quantum random number generator comprises an optical path module and a circuit module. The output end of the optical path module is connected with the input end of the circuit module. The optical path module comprises a laser, a beam splitter, a balanced homodyne detector, a vacuum state generator and a light amplifier. The output end of the vacuum state generator is connected with the input end of the light amplifier. The output end of the light amplifier is connected with one input end of the beam splitter. The output end of the laser is connected with another input end of the beam splitter. The output end of the beam splitter is connected with the input end of the balanced homodyne detector. The invention further provides a corresponding method. The generator generates the quantum random number through the measured and amplified vacuum state, a pseudo noise code and original ratio specific mode is used for error removal treatment, and therefore a true random number which is higher in production speed and better in randomness is produced.

The invention discloses ring-shaped oscillator based truly random number generation circuit and truly random number generator in the technical field of integrated circuit design. The ring-shaped oscillator based truly random number generation circuit comprises an oscillation sampling circuit, a postprocessing circuit and a control voltage generation circuit which are connected in sequence; and the sampling circuit comprises a first high-frequency ring-shaped oscillation circuit, a second high-frequency ring-shaped oscillation circuit and a low-frequency ring-shaped oscillation circuit. The ring-shaped oscillator based truly random number generator comprises a three-stage truly random number generation circuit based on a ring-shaped oscillator. The invention solves the problem that a random bit stream generates low-speed phase jitter accumulating and can quickly obtain a random bit stream with better randomness.

The invention discloses a method for identifying characteristic land categories of ocean remote sensing images of a coast on the basis of semi-supervised learning and belongs to the field of identification of semi-automatic remote sensing images. The method comprises the following steps of: selecting a marking sample for each type of characteristic ground objects; constructing a dividing result facing to the remote sensing images of an object; computing an initial estimation value of probability that pixels of all samples are subordinate to the characteristic land categories and computing theprobability that sample data falls under components of the characteristic land categories; amending a probability image by using a characteristic space rule; judging the characteristic land categories which the remote sensing images belong to, realizing the identification of the characteristic land categories and outputting an identification result drawing. The method is combined with the priori knowledge and the statistical property of the data and can guide the data mining process by the topographical priori knowledge. Practice proves that the algorithm can effectively carry out classification of the remote sensing images to obtain a satisfying result, has the characteristics of high efficiency and high accuracy and can be directly used for maintaining and updating remote sensing thematic information of all levels of fundamental geographic information databases in China.

The invention discloses a modeling method for a medium and long-term wind power output model of a power system capable of optimally running for medium and long terms. The modeling method has the advantages that wind power output of the power system in day peak periods, day valley periods and day shoulder load periods is computed, wind power output data in the day shoulder load periods are optimally selected, a wind power generation capacity substitution benefit is reasonably taken into consideration, a bidirectional wind power output peak-load regulation characteristic is considered on the premise that the running reliability level of the power system is guaranteed, the peak-load regulation balance of the power system is guaranteed, energy conservation and emission reduction benefits of wind power resources are sufficiently realized, the highest utilization rate of the wind power generating capacity is guaranteed, the characteristic of low schedulability of wind power is sufficiently taken into consideration, the randomness and the volatility of wind power output are correctly simulated, the modeling method conforms to medium and long-term optimal running simulation engineering practice of the power system, and the purpose of effectively computing the randomness, the volatility, the regionalism and the bidirectional peak-load regulation characteristic of wind power generation and the mutual relation among wind power generation and loads is achieved.

The invention provides an identification method for a radar disoperative target based on a mixed model, which is used for solving the problem that the disoperative target is low in identification rate. The method comprises the following steps: establishing a standard body model library of a refined scattering point model; structurally decomposing the disoperative target according to the standard body model library to generate a first scattering point model; shielding the first scattering point model to obtain an effective scattering point model; calculating RCS intensity for the effective scattering point to obtain intensity information and combining the intensity information to generate a scattering point matrix; adding a statistic characteristic into the scattering point matrix to obtain a second scattering point model of the disoperative target containing coordinate information and the RCS intensity information; carrying out multi-scattering point radar return simulation on the second scattering point model to establish a high resolution one-dimensional range profile template library; and identifying the tested high-resolution one-dimensional range profile by adopting a K near neighbor classifier by virtue of the high resolution one-dimensional range profile template library. According to the method provided by the invention, the target identification performance of the radar system can be improved.

Encrypting data without losing their format is important in computing systems, because many parties using confidential data rely on systems that require specific formatting for data. Information security depends on the systems and methods used to store and transmit data as well as the keys used to encrypt and decrypt those data. A policy broker is disclosed that maintains keys for clients in confidence, while providing cryptographically secure ciphertext as tokens that the clients may use in their systems as though they were the unencrypted data. Tokens are uniquely constructed for each client by the policy broker based on policies set by a receiving client detailing the formatting needs of their systems. Each client may communicate with other clients via the policy broker with the tokens and will send tokens unique to their system that the policy broker will translate into the tokens of the other party.