74 results about "Pseudorandom generator" patented technology

The invention belongs to the technical field of digital information transmission, and relates to a vehicle-mounted ad hoc network security communication system and method based on an NTRU lattice cryptosystem, and the system comprises a message signature module, a message encryption module, a message decryption module, an identity authentication module, and a key exchange module. The message signature module carries out signature by utilizing a private key and a random polynomial dynamically generated by a pseudo-random number generator based on an NTRU lattice cryptosystem; the message encryption module encrypts a to-be-sent message by randomly selecting a temporary polynomial and combining a public key of a receiver; the message decryption module is used for decrypting the received ciphertext # imgabs1 # by using a private key and an inverse element # imgabs0 # of a module p of the private key; the identity authentication module is used for performing identity authentication; the key exchange module realizes secure key exchange between communication nodes in the vehicle-mounted ad hoc network through an improved Blom key distribution protocol. The system improves the security and communication efficiency of the vehicle-mounted network.

The invention relates to the technical field of data storage, can be applied to business scenes such as medical health and financial science and technology, and discloses a multi-Pool storage resource adaptive writing method which comprises the following steps: monitoring available storage space, read-write input / output rate, average response time and data access frequency of each Pool; dynamically adjusting the current write-in weight of the Pool according to the monitoring result; converting the current write-in weights of all Pool into probability values, and constructing a discrete probability distribution table; selecting a target Pool through a pseudo-random number generator according to the probability distribution table; and writing the to-be-stored data into the target Pool. According to the method, the running state of each Pool is continuously monitored, and the writing weight is adjusted in real time, so that the problem of resource allocation rigidity under a fixed weight strategy is avoided; in combination with a discrete probability distribution table constructed based on normalized weight and a pseudo-random selection mechanism, selection of the target Pool has certain load balancing elasticity, and data can be more effectively guided to be written into the Pool with light load and excellent performance.

In one embodiment, an apparatus includes a first radio controller configured to communicate using a first protocol; and a pseudo-random number generator configured to generate a pseudo-random output value based on the input data value. The apparatus includes a processor configured to determine a preamble based on an output of the pseudo-random number generator, and process a data packet received using the first radio controller using the preamble to generate a processed data packet.

A processor may receive a request to perform an operation. The processor may generate a seed derived from data required to perform the operation. The processor may generate a perturbation based on inputting the seed into a pseudorandom number generator. The processor may generate the actual result based on performing the operation. The processor may generate a perturbed result, wherein generating the perturbed result may comprise performing a second operation based on the actual result and the perturbation. The processor may return the perturbed result in response to the request.

The invention discloses an embankment outburst flood risk assessment method, system and device and a storage medium, embankment outburst flood risk assessment is performed based on an embankment outburst mechanism model and data driving, and the embankment outburst mechanism model is used to provide a data basis for an embankment outburst prediction model based on machine learning. The method comprises the following steps: predicting the probability of dike burst by using a dike burst prediction model, judging whether each sub-dike section breaks or not by using a pseudo-random number generator, updating the boundary condition of a dike burst mechanism model according to the burst judgment result of each sub-dike section, and finally obtaining the grid water level and grid flow velocity of each flood area grid in a preset future time period after multiple cycles. Therefore, the flood risk level of each flood area grid can be determined. According to the method, a data basis is provided for drawing the dike outburst flood risk map, the accuracy and reliability of dike outburst flood risk assessment are improved, and the method can be widely applied to the technical field of artificial intelligence.

A methods comprises: receiving, by a pseudo random number generator module, an instruction to generate pseudo random numbers from a security application; determining, by the pseudo random number generator module, at least one algebraic input parameter value for a transcendental equation from a randomness library in memory of the device, wherein the transcendental equation comprises a transcendental function that is capable of generating transcendental number outputs from algebraic number inputs; calculating, by the pseudo random number generator module, a solution to the transcendental equation based on the at least one algebraic input parameter value; determining, by the pseudo random number generator module, pseudo random number(s) based on the solution; and storing, by the pseudo random number generator module, the pseudo random number(s) in a randomness library for use as seeds for keys by the security application and as subsequent input parameter values for the pseudo random number generator module.

The invention discloses a digital signature method and device, equipment and a storage medium, and relates to the technical field of information security, and the method comprises the steps: randomly generating a polynomial coefficient and a seed share through employing a threshold digital signature algorithm based on an elliptic curve, and generating an initial private key share and an initial public key share through employing the polynomial coefficient; generating a shared seed between the current participant and the other participants based on the seed shares of the current participant and the other participants, and calling a pseudo-random number generator through the shared seed so as to generate a related random number; and deriving the initial private key share and the initial public key share by using the related random number so as to generate a new private key share and a new public key share, and finally performing blind processing on the new private key share so as to realize digital signature of the to-be-signed information. According to the application, distributed storage of the signature public and private key pairs can be realized while the problem that the transaction can be linked is solved, so that a possible single-point fault hidden danger is solved, and the safety of the wallet is improved.

Low-resource overhead computer-implemented methods for enrolling, authenticating and establishing encryption keys for one or more queried devices, each of the queried devices including an electrical circuit configured to output electrical signals indica-five of a physically unclonable function (PUF) of the queried device. Authentication and encryption are implemented in low-resource queried device computational architectures, with embodiments of the present invention utilizing pseudo-random number generators configured based on unique primitive polynomials, masking and unmasking functions, and error correction protocols executed in a querying device.

The invention discloses a random question number generator and method suitable for a question and answer mode watchdog, and belongs to the technical field of integrated circuit safety. Comprising an on-chip high-frequency oscillation source, an enabling controller, a low-power-consumption controller, a pseudo-random number generator and a random code hopping device. According to the method, an external dog feeding signal is used for triggering, a non-reproducible hopping code value is generated by using different sources of clock sources and physical deviation of signal transmission, a pseudo-random number generator is controlled to operate within a random duration, and a low-power-consumption state is entered after a final random problem number is output and latched. Through hardware-level entropy source enhancement and dynamic power consumption management, the predictable potential safety hazard of the traditional pseudo-random number sequence is fundamentally solved, and the balance of high randomness, high attack resistance and low power consumption is realized at low cost.

A system for generating a virtual model of a virtual patient including: a template module to provide a morphable virtual 3D mesh template for a virtual model of a human organ; an anatomical parameters module to provide a range of values for each adjustable anatomical parameters of the virtual model, each value associated with a morphed state of the template; a plausibility module to provide at least one relation for the template in at least one morphed state, the relation being between at least two of the parameters; an instantiation module to provide, using a pseudo-random number generator, a parameter set including, for each parameter of the virtual model, a value of the corresponding range of values, while fulfilling the at least one relation; and a generating module to generate the virtual model based on the template in the morphed state corresponding to the selected parameters.

Devices, networks, systems, methods, and processes for rotating a Media Access Control (MAC) address of a device. A device can negotiate a periodicity for address rotation of the MAC address associated with the device. The device may receive a data frame and generate seed data based on the data frame. The device can also utilize a shared secret key, a cryptographic hash function, and / or a cryptographically secure pseudorandom number generator to generate the seed data. The device can determine timestamp data based on the periodicity or a time of reception of the data frame. The device may utilize a pseudorandom function to determine the MAC address based on the timestamp data and the seed data. The device can generate the MAC address after every rotation cycle. Upon waking up from a power saving mode, the device can synchronize with a network device to generate next MAC address.

This invention discloses a secure aggregation method and system for multi-party medical model parameters based on blockchain. Combining homomorphic pseudo-random number generator technology and one-time pad encryption technology, this invention designs a blockchain-based method for covertly distributing pseudo-random number generator seeds. This achieves privacy protection for local model parameters in a single round, random replacement of local model masks in multiple rounds, and efficient aggregation of global model parameters. It prevents the risk of privacy leaks due to unauthorized entities stealing medical model parameters. Furthermore, the invention designs a blockchain-based hierarchical summary record for model parameters, significantly reducing the communication and computational overhead of model training nodes and the recovery of erroneous model parameters while ensuring the consistency of the medical model.

Embodiments of the application disclose a database primary key generation method and device, electronic equipment and a storage medium. The method comprises: generating a primary key generation matrix according to a target character set and a target number set, the target character set comprising characters in an ASCII character set; generating a position matrix according to the number of primary key elements in the primary key generation matrix; generating a random integer in a target integer range through a pseudo-random number generator according to random seed information; obtaining a target position element corresponding to the random integer in the position matrix; determining a target position represented by the target position element and obtaining a target primary key element corresponding to the target position from the primary key generation matrix; and repeatedly performing the operations of generating the position matrix and obtaining the target primary key element until a character sequence meeting a target condition is obtained, and taking the character sequence as a database primary key, the character sequence comprising the target primary key element. The embodiments of the application can improve the primary key generation efficiency and security.

When presenting tactile sensations to 3D models, directly using high-resolution shape information increases the communication and computational load, and using pseudo-random numbers alone results in a monotonous sensation. Therefore, the challenge is to achieve natural and diverse tactile sensations with low load. [Solution] This invention is a method for achieving tactile feedback that combines smoothness and natural variation by generating a structured and smooth basic unevenness pattern using a pseudorandom number generator and adding a non-deterministic fluctuation component using a quantum random number generator. The contributions of both are controlled by a weighting function that varies over time depending on the user's operation speed, direction, contact duration, etc., and the tactile unevenness height corresponding to the coordinates on the 3D model is calculated to drive the tactile reproduction device. The tactile reproduction device can be either a device that outputs physical stimuli or an interface device that provides stimulating signals to the nerves and brain, enabling realistic and diverse tactile presentation with low load.

The invention discloses a digital reset circuit and a chip. The digital reset circuit includes a first pseudo-random number generator, a second pseudo-random number generator, and a controller. The first pseudo-random number generator is used for generating a first pseudo-random number; the second pseudo-random number generator is used for generating a second pseudo-random number, and the first pseudo-random number generator and the second pseudo-random number generator respectively work in different voltage domains; and the controller is used for generating a reset signal based on the first pseudo-random number and the second pseudo-random number, and resetting based on the reset signal. Pseudo-random numbers of different voltage domains are monitored in real time through a controller of the digital reset circuit to generate reset signals, reliable reset signals can be provided in a scene with unstable power supply voltage (such as a power-on period), and safe reset can be provided when the power supply voltage is unstable, so that the stability of an analog circuit is compensated, and the reliability of the analog circuit is improved. And meanwhile, the implementation mode is simple, the circuit area is small, and the working reliability and stability of the chip are improved by utilizing the most limited resources.

The invention discloses an intelligent power grid group key negotiation method and system based on phase characteristics, and mainly solves the problems that an existing intelligent power grid is large in calculation and communication overhead and is difficult to adapt to large-scale equipment access. According to the implementation scheme, a central node and a demand response group are arranged in a smart power grid, and interactive detection between the central node and the demand response group is carried out to obtain an initial key; performing quantization, exclusive-or operation and decoding on the initial key in sequence to obtain an error-corrected key; enhancing the error-corrected secret key through a hash function and a pseudo-random number generator to generate a final dual-communication node secret key; the central node aggregates all the dual-communication node keys, generates a global group key through Hash operation, and encrypts and distributes the global group key by using each node key; and according to the joining or quitting of the node, recombining the key library by using a forward or backward security principle, generating a new group key, encrypting and broadcasting the new group key to a legal node. The method can reduce the calculation and communication overhead, ensures the safety when the node dynamically joins or quits, and can be used for a complex smart grid environment.

Systems and methods are provided herein for efficient, reproducible noise sampling coordinate generation for texture synthesis in image and video processing. The techniques enable high-quality film grain or texture synthesis as a post-processing step in video decoders, masking compression artifacts and restoring perceptual quality. Hash-based mapping, including direct coordinate mapping and linear index hashing, can be used to generate coordinates for noise sampling by hashing image block coordinates and a seed with preselected constants to generate sampling positions. Shuffled permutation sampling can be used to generate coordinates by generating and shuffling a list of template coordinates using a seeded pseudo-random number generator, and assigning unique positions to each block. Wrap-around addressing, including treating the noise template as a toroidal space, can be used to maximize coverage and eliminate edge bias. The disclosed techniques provide deterministic, hardware-friendly, and unbiased sampling.

Embodiments include constructing a set of pseudo-random number generators (PRNGs) with known or unknown bases using unique salt water values, which include a salt value for the set and a different index value for each PRNG in the set. Additional parameters for such PRNGs are based on the corresponding salt water values ​​of the PRNGs, thereby ensuring that the PRNGs in the set have different state cycles. Embodiments select pseudo-random salt values ​​for each set so that PRNGs from different sets may have different additional parameters. According to an embodiment, a stream of generators in a set is created by a splitter that carries the salt value of the set and combines the salt value with the index value of the generator to generate additional parameters for the salt processing of the PRNG in the stream. According to an embodiment, such a stream can be executed in parallel by multiple threads.

The present invention relates to the field of coding, and more particularly to an improved Festel-based encryption method for EPC codes of aircraft equipment. The method comprises the following steps: S1, mapping the aircraft equipment code to the EPC code; S2, encrypting the aircraft equipment EPC code using the improved Festel network, including the following substeps: S21, segmenting the EPC code into scrambling, left, and right halves; S22, generating a pseudorandom sequence using a pseudorandom number generator; S23, obtaining a binary number as a round key based on the pseudorandom sequence; and S24, iterative encryption to obtain a final encrypted result. The present invention maps traditional aircraft equipment codes to EPC codes and encrypts them using the improved Feistel network. This method not only enhances information uniformity and traceability, but also ensures data security while preserving the standard format of the EPC code.

Techniques are provided that rotate a device address used to identify a wireless client device on a wireless network. The wireless client device and at least one network infrastructure component identify a plurality of device addresses associated with the wireless client device. In some embodiments, the plurality of device addresses are generated via a corresponding plurality of invocations of a stateful random number generator, such as a cryptographically secure pseudo-random number generator.

The application discloses a random rotation DEM structure for reducing switch activity, comprising a digital-to-analog converter, a digital input of the digital-to-analog converter is divided into an input code and a random rotation number, the random rotation number is input into a switch activity reduction structure through a barrel shifter output result delayed by a D flip-flop for one period, a feedback output of the switch activity reduction structure is fed back to the barrel shifter as an input, and an output of the barrel shifter after rotation controls corresponding switches and is connected to a corresponding cell array. The application uses input data to replace a pseudo-random number generator, and uses relatively simple logic to realize a switch activity reduction function, so that the complexity is reduced.

An apparatus configured to apply a convolutional precoder with a time-varying polynomial to an information vector to generate a precoded vector, wherein coefficients of the time-varying polynomial are generated by a pseudo-random number generator (PRNG) using a radio network temporary identifier (RNTI) as an initialization seed, generate a polarization-adjusted convolution (PAC) codeword based on the precoded vector and transmit the PAC codeword.

Various embodiments of the present disclosure provide electromagnetic based secure contact-less integrity verification for an integrated circuit. In one example, an embodiment provides for mapping a signal to a pseudo-random number generator (PRNG) seed value, generating a PRNG output digital signal based on the PRNG seed value, encrypting the PRNG output digital signal based on a cipher function and a key, and generating an electromagnetic signal associated with the PRNG output digital signal to facilitate non-contact sensing of the electromagnetic signal by a probing system.

The invention discloses a secure video data transmission method based on a selective encryption technology, and belongs to the field of video data encryption transmission. The implementation method comprises the following steps of: performing discrete cosine transform on video frame image data, and converting a pixel value matrix in a video frame into a transformation coefficient TC matrix; carrying out binarization processing on the transformation coefficient through TRp; checking whether the transformation coefficient can be encrypted or not, and determining that the transformation coefficient at the current position does not influence the adjacent transformation coefficient at the current position; a CTR mode of an AES algorithm is adopted as a pseudo-random number generator, selected syntax elements are encrypted in a stream cipher form, it is ensured that the encrypted video stream can still be decoded by a standard decoder, and meanwhile the transmission data volume is not increased; the encrypted symbol is recovered by performing an XOR operation on the ciphertext and the same pseudo-random number generator output. According to the invention, secure video data transmission based on selective encryption can be realized, the transmission efficiency, security and reliability of video stream data can be improved, and the overhead of encryption calculation is significantly reduced.

To efficiently generate a floating-point pseudo-random number.SOLUTION: A first generation unit generates a first bit string that is random and has a bit length of a floating-point number. A second generation unit generates a second bit string that has the bit length of the first bit string, by using a predetermined sign bit, a predetermined bit string of an exponent part, and a bit string of a mantissa part included in the first bit string.SELECTED DRAWING: Figure 1

A pseudo random number generator includes a first generator configured to generate a random first bit sequence having a bit length with floating-point representation, and a second generator configured to generate a second bit sequence having the bit length, using a predetermined sign bit, a bit sequence of a predetermined exponent part, and a bit sequence of a mantissa part included in the first bit sequence.

A User Equipment, UE, capable of simultaneous transmission and reception applied in ambient Internet of Things, IoT, includes: receiving, at a first apparatus, UE 110, and from a second apparatus, network device gNB 120, configuration information associated with a discovery or communication session with a third apparatus, ambient IoT device 130 (e.g. a tag, passive radio), the configuration information indicating one of: a time window or frequency band for the discovery or communication session, or a parameter for generating the resource configuration; determining a first set of resources for transmission to the third apparatus; determining a second set of resources for reception from the third apparatus based on the first set of resources and capability information; and performing the discovery or communication session with the third apparatus based on the determined configuration. In a first embodiment Capability information comprises one of: a bandwidth gap between uplink and downlink bandwidths for the full duplex operation, a spatial gap between uplink and downlink for the full duplex operation, the number of reception and transmission antenna constellations, or a reception and transmission antenna constellation for the full duplex operation. In a second embodiment, the first apparatus is caused to: initialize a pseudorandom number generator based on the parameter; determine a number of random integers using the pseudorandom number generator; determine a set of transmission carriers by mapping each of the random integers to a transmission carrier; and determine the first set of resources comprising the set of transmission carriers.

The application relates to a data transmission method based on a quantum key seed, a communication system and a storage medium, the method comprising: cutting an original data stream into data frames, performing fountain code encoding on each data frame to generate a coded symbol stream, generating a truly random quantum key seed, generating a time hopping control sequence through an encryption secure pseudo-random number generator with the quantum key seed as input, sending the coded symbol stream to a receiving end according to the time hopping control sequence, and recovering the original data stream from the data frames of the coded symbol stream by the receiving end according to the fountain code encoding, the quantum key seed and the coded symbol stream. According to the technical scheme, the'scissors difference' defect of the quantum key rate and the data rate is avoided, the real-time communication demand is met, and the time hopping pattern is generated by the quantum key seed, so that the security is established on two dimensions of quantum randomness and time uncertainty, and the security of data communication is improved.

The invention comprises a pseudo random number generator employed to create and encryption key stream. Multiple known key sequences are loaded into memories 304A-D. Segments of each of these sequences

The present invention provides an image encryption method based on the SVIR propagation model, which relates to the field of image encryption technology. The method first marks all pixels of the plaintext image as susceptible and uses a pseudo-random number generator to generate pseudo-random numbers. Then, based on the pseudo-random numbers, naturally immune pixels and initially infected pixels are selected. Then, based on the positions of the infected pixels, "disease" is propagated in the rows and columns where the infected pixels are located, as well as within the eight-neighborhood range, ultimately determining the infected pixels and the susceptible and vaccinated pixels. Finally, based on the order in which the infected pixels are infected and the order in which the susceptible and vaccinated pixels are located, the positions of the ciphertext image pixels are rearranged, and the pixel values of the pixels are changed to obtain the ciphertext image. This method improves encryption speed and makes the ciphertext image highly robust. It can restore the content of the plaintext image as much as possible when there is data loss or noise in the ciphertext image.