29 results about "Random array" patented technology

The invention relates to a power data hybrid encryption transmission method, system and device, and a readable storage medium. The method comprises the following steps: S1, encrypting a power data plaintext by using a session key to obtain a ciphertext; s2, cutting the ciphertext into a plurality of sections of sub-ciphertexts, combining the sub-ciphertexts with unique random numbers to obtain a plurality of combinations of the sub-ciphertexts and the random numbers, and combining the random numbers to obtain a random number group; randomly sorting the plurality of sub-ciphertexts and random number combinations to obtain a random ciphertext array; s3, encrypting the session key and the random array, and performing digital signature on the random ciphertext array; s4, transmitting the encrypted random array, the session key, the random ciphertext array and the digital signature to a receiver in a parallel communication mode; s5, the receiver verifies and decrypts for many times to obtain the electric power data, the problem that data safety and data transmission efficiency cannot be considered in the existing electric power transmission process is solved, the data transmission safety is improved, and it is ensured that the transmission speed cannot be greatly reduced.

The invention belongs to the technical field of communication signal processing, and more specifically relates to a DOA estimation method based on self-supervised contrast learning under a non-ideal array. The invention provides a two-stage cascade DOA (direction of arrival) estimation framework. The framework is composed of two modules which are respectively a control reconstruction network (CRN) and a direction of arrival (DOA) estimation network (DEN), and the two modules are respectively a control reconstruction network (CRN) and a direction of arrival (DOA) estimation network (DEN). The CRN adopts self-supervised contrast learning to recover a covariance matrix, so that the network has robustness when facing array defects. And the DEN takes the reconstructed covariance matrix output by the CRN as input to complete a DOA estimation task. In order to improve the generalization ability of the network, non-ideal enhancement modes such as amplitude disturbance, phase disturbance and random array element shielding are introduced into a training sample, and a two-stage training strategy is adopted to optimize CRN and DEN network parameters respectively.

The secret distribution device has a true random number generation section that generates true random numbers, and a calculation section that performs secret distribution on a value obtained by multiplying k (k > 1) true random numbers from the true random number generation section, performs calculation on the inverse of one of the k true random numbers, and combines the inverse with one of the distributed values after secret distribution, and performs calculation on k sets of conversion random numbers.

The application is suitable for the technical field of image display control, and provides a display control method, a display control device and a display screen controller, which comprises the following steps: determining S different random arrays corresponding to S LED dot arrays respectively; determining the cumulative value of the values included in the random arrays to obtain the total number of time segments corresponding to each random array; for each random array, determining the time segment duration corresponding to each value included in the random array according to the display duration of a single image frame and the total number of time segments corresponding to the random array; after obtaining an image frame to be displayed, determining, for each LED dot array, whether the LED dot array is lit on the time segment corresponding to the value included in the random array corresponding to the LED dot array according to the image data corresponding to the LED dot array in the image frame and the total number of time segments. Through the above method, the probability of leaking the displayed information of the LED display screen when displaying information can be reduced.

Embodiments of the present specification provide a data processing method and device. The method is performed by any target party in multiple parties, comprising: first acquiring two table shards corresponding to two data tables, and a target table shard corresponding to any target table in the two data tables is one of multiple secret sharing shards of the target table; then, for the target table shard, based on a primary key column sub-shard contained in the target table shard and a corresponding generated key shard, a pseudo-random array sub-shard is determined for restoring a pseudo-random array; the target table shard is subjected to permutation processing based on the pseudo-random array to obtain a corresponding sorted table shard; and then, based on two sorted table shards corresponding to the two table shards, a connection table shard is determined, which is one of multiple secret sharing shards of a primary key connection table corresponding to the two data tables.

The present disclosure relates to an image sensor and a manufacturing method therefor. The image sensor comprises at least one pixel cell, and each pixel cell comprises: a photosensitive element; and a pseudo-random array diffractive optical element (PRADOE) located in front of a light receiving side of the photosensitive element and comprising an array of unit structures oriented at a pseudo-random angle. The PRADOE is configured to cause multi-order diffraction of light to be received by the photosensitive element.

The embodiment of the invention discloses a random array sound vortex generation method, device and equipment and a storage medium, and belongs to the field of sound vortexes, and the method comprises the steps: building a sound field model from a random array to an observation plane, and determining the sound pressure distribution of ideal sound vortexes; expressing the sound pressure distribution of the ideal sound vortex by using a sparse representation basis, and generating a linear relationship between the sparse representation basis and a driving signal; establishing a relationship between the sparse coefficient and the sound pressure of the observation point by using the sensing matrix; minimizing the error between the actual sound pressure generated by the sparse coefficient through the sensing matrix and the sound pressure distribution as a target, and utilizing L1 norm penalty to make the sparse coefficient sparse to obtain an optimized sparse coefficient; and calculating according to the optimized sparse coefficient to obtain a driving signal vector. The geometric limitation of a traditional uniform circular array is broken through, and the flexibility and robustness of array design are improved. The array configuration and the number of units can be optimized for different scenes.

The invention provides a 5G gateway identity authentication method and device based on a block chain and a storage medium, and the method comprises the steps: obtaining a gateway identity token by a to-be-authenticated 5G gateway, and generating a gateway private key and a random number group based on a preset encryption algorithm; the to-be-authenticated 5G gateway performs segmented encryption on the gateway identity token according to the random number group to obtain a check code with overlapped segments; the to-be-authenticated 5G gateway generates an authentication key group according to the gateway identity token; the to-be-authenticated 5G gateway encrypts the check code according to the gateway private key, the random number group and the authentication key group to generate an authentication ciphertext, and uploads the authentication key group and the authentication ciphertext to the block chain; and the block chain carries out decryption verification and transaction registration according to the authentication key group and the authentication ciphertext, links a corresponding verification record for evidence storage after the verification is passed, and triggers the 5G core network to issue a session key to the to-be-authenticated 5G gateway.

Methods provide device authentication for an intrusion detection system implementing building automation and control network (BACnet) Master-Slave / Token-Passing (MS / TP). An authentication protocol provides countermeasures to vulnerabilities in the BACnet MS / TP physical layer by utilizing an extended message format to cloak device identifiers (IDs). Adversaries are prevented from using known device IDs to gain access to the network. An authenticating device hashes a device identifier of a device to be authenticated combined with a random number. The authenticating device receives a hash of the random number plus the device identifier from the device. The authenticating device compares the hashes and authenticates the device if the hashes match. To transmit the hash, the BACnet MS / TP frame format includes an extended header cyclic redundancy check (CRC) field having bytes reallocated from the data field of the frame format. Another countermeasure utilizes a physical unclonable function (PUF) of the device in the extended header CRC.

An encryption unit (403) that an encryption apparatus (400) includes, when a user secret key SKΓ is generated using a secret key MSK of attribute based encryption and a set of attributes Γ corresponding to a decryption-possible condition L, generates a key K and a ciphertext P corresponding to the key K by encrypting the decryption-possible condition L using, as an encryption key of the attribute based encryption, a key PK consisting of a public key MPK corresponding to the secret key MSK and a public key PQCPK of post quantum cryptography, regards a part of the ciphertext P where the decryption-possible condition L is encrypted based on a secret value as P-D, regards a part of the ciphertext P where the secret value that is shared is encrypted as P-SS, and generates K′ and P′-D by randomizing each of the key K and the P-D using a random number R, and generates a ciphertext C by encrypting data consisting of the P-D and the random number R using the public key PQCPK. Here, the P-SS, the P′-D, and the K′ are decryption-possible verification parameters corresponding to the user secret key SKΓ.

Bandwidth-controlled, private, multi-party joint data processing is described. When performing an nth iteration of joint data processing on service data, multiple participants separately determine a same nth identifier at the current iteration and includes sub-identifiers separately corresponding to service data of the multiple participants. The multiple participants are enabled to separately determine their respective random arrays in a predetermined trusted interaction manner and based on the nth identifier and initial seeds of the multiple participants. When a first sub-identifier exists in a correspondence between sub-identifiers and confidential data, the multiple participants separately obtain first confidential data corresponding to the first sub-identifier and perform the current iteration of joint data processing with another participant using secure multi-party computation (MPC) based on exchange of other confidential data and respective first confidential data. The first confidential data is obtained by fusing first service data and a corresponding first random number.

The embodiments of the present specification provide an anonymous identity authentication method and device. According to the method, a first device generates a binary indication vector and an auxiliary vector having a predetermined relationship with the indication vector according to the sequence index of a first account in a target account set; and generates a signature value C according to the indication vector, the auxiliary vector and a private key of the first account. A first public key vector is also calculated according to a first random number selected by a verification device and a public key sequence of the target account set, and a blinding value is calculated based on the first public key vector and a random number array selected by the first device. The first device further generates a first and second group of commitment values according to the indication vector, the auxiliary vector and a challenge array and a variable value selected by the verification device. The first device provides the signature value C, the blinding value and the first and second group of commitment values to the verification device, and the verification device verifies whether the first account belongs to the target account set according to the foregoing.

The invention discloses an image recognition method based on a hybrid resistive array and electronic equipment, and relates to the technical field of integrated circuits and memory computing. An excitation and suppression coexisting nerve processing mechanism in a biological vision system is simulated, when a voltage signal converted from an image to be recognized is applied, the resistive array can process image information in situ in parallel, the first type of resistive devices generate excitability response to forward voltage, and the second type of resistive devices generate excitation response to reverse voltage. And the second type of device generates an inhibitory response to a negative voltage, so that the contrast ratio and the boundary definition of image features are greatly enhanced, and high-specificity output current response can be generated. The problem of insufficient image recognition precision caused by lack of an inhibitory mechanism is solved, and high-accuracy image recognition is realized.

The invention relates to the technical field of Internet of Things security, in particular to a network security early warning method and system based on a supply chain, and the method comprises the following steps: when Internet of Things security terminal equipment is started, extracting a unique identifier of each software component in a self software material list, and obtaining a public key of a vulnerability information publishing center; and encrypting the unique identifier of the software component. According to the method, early warning of potential attack behaviors is realized, two different security states of only existence of vulnerabilities and utilization of the vulnerabilities can be distinguished, a drift value is combined with a timestamp and a random number, digital signature is performed by a trusted execution environment, and an unforgeable signature certification result is generated. According to the invention, a high-credibility decision basis is provided for the management platform, so that the management platform can automatically execute mitigation measures based on the confirmed equipment end evidence, the timeliness of threat response is improved, and the risk of service interruption caused by misjudgment is reduced.

The application discloses a site selection method and system of a pseudo-random array radar system and electronic equipment, and relates to the technical field of concealed pseudo-random array radars. The method comprises the following steps: determining any radar in the pseudo-random array radar system as a current radar; performing noise reduction processing on a target position according to prior information to obtain a target noise-reduced position of the current radar; obtaining an actual position of the current radar by using a Beidou differential positioning method; determining a first error value, a second error value and a third error value according to the actual position and the target noise-reduced position; and controlling the current radar to move to a preset range of the target noise-reduced position according to the first error value, the second error value, the third error value, the actual position and the target noise-reduced position, so as to complete site selection control of the current radar. The actual position of the radar is iteratively corrected, and the site selection accuracy of the pseudo-random array radar system can be improved.

Provided is a method for measuring a DAC nonlinearity error based on a pseudo-random sequence. The method includes: numbering pseudo-random number values in a pseudo-random sequence to generate a serial number sequence; arranging the pseudo-random number values in the serial number sequence in a descending or ascending order to determine an order random array; sending the pseudo-random number values, as DAC code values, in the order random array to the DAC sequentially; determining a first differential voltage array and a second differential voltage array according to a voltage corresponding to the DAC code values and the DAC code values; and determining a nonlinearity error measurement result of the DAC according to a differential nonlinearity error test result of the DAC and an integral nonlinearity error test result of the DAC determined by the first differential voltage array and the second differential voltage array.

The application provides a question bank data processing method, device and equipment, storage medium and program product, and belongs to the technical field of data security. The method comprises the following steps: receiving request information sent by a user terminal, and obtaining an Internet protocol (IP) address in the request information; obtaining question bank data according to the request information; determining an encryption public key according to the IP address; generating a random number; encrypting the question bank data by using the encryption public key and the random number to obtain encrypted question bank data; combining the encryption public key and the random number to obtain a combined secret key; and sending the encrypted question bank data and the combined secret key to the user terminal, so that the user terminal determines a decryption private key, and decrypts the encrypted question bank data according to the decryption private key and the combined secret key to obtain the question bank data. The method solves the problem of poor effect of the data security protection mode.

This disclosure relates to an image sensor and a method for fabricating the same. The image sensor includes at least one pixel unit, each pixel unit of the at least one pixel unit including a photodetector and a pseudo-random array diffractive optical element (PRADOE) which includes an array of unit structures located on the front of the light-receiving surface of the photodetector and oriented at a pseudo-random angle. The PRADOE is configured to cause multiple-order diffraction of light received by the photodetector.

The invention belongs to the technical field of information security, and discloses a two-party cooperation post-quantum signature method supporting blind signature, which is applied to a client and a server, and the two-party cooperation post-quantum signature method supporting blind signature applied to the client comprises the following steps: obtaining a first public key parameter of the client, acquiring high-order part information of the public key component; after a first commitment value and a first hash value are generated based on the first random number group, a second commitment value is verified through a second hash value sent by the server; performing blinding to generate a challenge by using the blinding factor and the masking vector obtained by calculation and combining the first commitment value, the second commitment value and the high-order part information, and calculating to obtain a blinded challenge value; calculating a first signature component according to the blinded challenge value and a first private key component corresponding to the first public key parameter; generating a target blind signature value based on the first signature component and a second signature component sent by the server; through the method, the security of the collaborative signature is improved.

The application provides a method for random stroboscopic coordination and synchronization of multiple dimming chips in a same light device, comprising: each dimming chip receiving a random number array input by a master controller; each dimming chip analyzing a light channel brightness value set input and outputting a control signal to control light source brightness; and each dimming chip indexing a starting number in the random number array according to an obtained asynchronous stroboscopic starting random number, starting countdown stroboscopic, to complete a current stroboscopic period. In the application, because the random number array, asynchronous stroboscopic starting random number, analyzed light channel brightness value set and stroboscopic period received by each dimming chip in the same light device from the same master controller are consistent, the stroboscopic of each light source in the light device is ensured to be consistent, and each stroboscopic period will change with the corresponding starting number to form asynchronous stroboscopic or random stroboscopic effect.

The embodiment of the application discloses a random array acoustic vortex generation method, device, equipment and storage medium, belongs to the field of acoustic vortex, and comprises the following steps: an acoustic field model from a random array to an observation plane is established, and the sound pressure distribution of an ideal acoustic vortex is determined; the sound pressure distribution of the ideal acoustic vortex is expressed by using a sparse representation base, and a linear relationship between the sparse representation base and a driving signal is generated; a perception matrix is used to establish the relationship between sparse coefficients and observation point sound pressures; the L1 norm penalty is used to promote the sparsification of sparse coefficients in order to minimize the error between the actual sound pressure generated by the sparse coefficients through the perception matrix and the sound pressure distribution, and the optimized sparse coefficients are obtained; and the driving signal vector is calculated according to the optimized sparse coefficients. The embodiment breaks through the geometric limitation of the traditional uniform circular array, improves the flexibility and robustness of the array design, and can optimize the array configuration and the number of units according to different scenes.

The utility model discloses a multichannel microphone random array, relates to the technical field of sampling, and aims to solve the technical problem that the sampling precision in the existing voiceprint sampling technology is not suitable for being used in an open environment due to environmental influence. The system comprises a sampling module, a connection module and a control module, and the sampling module is connected with the control module through the connection module; the sampling module comprises a random array formed by 128 microphones, the 128 microphones are divided into a plurality of microphone parts, each microphone part comprises a plurality of microphones which are arranged randomly, and the sampling module is of a plane structure. According to the utility model, the 128-channel microphone random array is adopted, so that the data acquisition range is enlarged, the random array is divided into different microphone parts, the acquired data are compared, the data processing rate can be improved, the accuracy and representativeness of the data are ensured, and errors are reduced.

The invention relates to a dynamic temperature field optimization method for melt extrusion deposition 3D printing of a semi-crystalline thermoplastic polymer. The dynamic temperature field optimization method comprises the following steps: firstly, constructing a fastest cooling curve of the polymer; combining a printing path, a printing speed, a printed layer temperature and an adaptive curve to generate a radial symmetric partition dynamic temperature field containing a crystallization control area and a fusion control area; and finally, real-time temperature data are obtained through multi-camera infrared thermal imaging, and printing head accompanying array heating power closed-loop control is adjusted according to a temperature field control relation matrix by comparing calculation deviation. According to the method, the crystallinity of a printed piece is stabilized to exceed 30%, secondary annealing is avoided, the deformation is smaller than or equal to 0.1%, and the production period is shortened by 30% or above.

The application discloses a kind of methods for accurate pairing of multiple robots, belong to robot technical field;The application is by connecting the receiver of robot with remote controller and divided into: initial connection, second connection, third connection and nth connection;In the process of establishing connection, it involves encryption decryption process, random number generation and reorganization process, random number and label information double verification process;The connection information sent by the method is encrypted and decrypted by asymmetric encryption algorithm, so that the information transmitted is safe and reliable;The label information of the method is formed by random number combination, and the verification of label information is more secure with the continuous update of random number change;The receiver of the method needs to verify the label information and random number, while the remote controller needs to verify the reorganized feature code, to achieve the purpose of two-way verification, to prevent multiple robots from existing at the same time, the phenomenon of matching error occurs.

Embodiments of the present description provide an anonymous identity verification method and an apparatus. According to the method, a first device generates a binary indicator vector and an auxiliary vector having a predetermined relationship with the indicator vector on the basis of a sequence number index of a first account in a target account set; and generates a signature value C on the basis of the indicator vector, the auxiliary vector, and a private key of the first account. The first device further calculates a first public key vector on the basis of a first random number selected by a verification device and a public key sequence of the target account set, and calculates a blinded value on the basis of the first public key vector and a random number array selected by the first device. The first device further generates first and second sets of commitment values on the basis of the indicator vector, the auxiliary vector, and a challenge array and a variable value selected by the verification device. The first device provides the signature value C, the blinded value, and the first and second sets of commitment values to the verification device, and the verification device verifies accordingly whether the first account belongs to the target account set.

A data processing method, medium, device and product for calculation of both security parties, participants of calculation of both security parties comprise a first participant and a second participant, and the data processing method comprises the following steps executed by the first participant: obtaining first replacement information and a first random number group; performing encryption processing with the second participant based on the first permutation information and the first random array to obtain a first encrypted permutation array; wherein the second participant participates in encryption processing at least based on the first secret key and the second random number group; sending the first encryption permutation array to the second participant; wherein the second participant decrypts the first encrypted permutation array to obtain a first permutation array; performing security two-party calculation with the second participant based on the first permutation information and the first random number group; wherein the second participant participates in the calculation of the two security parties based on the second random array and the first permutation array. And the calculation flexibility and the data security of two security parties are effectively improved without depending on a third party.

Methods provide device authentication for an intrusion detection system implementing building automation and control network (BACnet) Master-Slave / Token-Passing (MS / TP). An authentication protocol provides countermeasures to vulnerabilities in the BACnet MS / TP physical layer by utilizing an extended message format to cloak device identifiers (IDs). Adversaries are prevented from using known device IDs to gain access to the network. An authenticating device hashes a device identifier of a device to be authenticated combined with a random number. The authenticating device receives a hash of the random number plus the device identifier from the device. The authenticating device compares the hashes and authenticates the device if the hashes match. To transmit the hash, the BACnet MS / TP frame format includes an extended header cyclic redundancy check (CRC) field having bytes reallocated from the data field of the frame format. Another countermeasure utilizes a physical unclonable function (PUF) of the device in the extended header CRC.

A display control method and apparatus, and a display screen controller. The display control method comprises: respectively determining S different random number arrays corresponding to S LED dot matrices; determining the sum of values comprised in each random number array, in order to obtain the total number of time segments corresponding to each random number array; for each random number array, on the basis of a display duration of a single image frame and the total number of time segments corresponding to the random number array, separately determining a time segment duration corresponding to each value comprised in the random number array; and after acquiring an image frame to be displayed, for each LED dot matrix, on the basis of image data in the image frame that corresponds to the LED dot matrix and the total number of corresponding time segments, determining whether the LED dot matrix is turned on during time segments corresponding to values comprised in a random number array corresponding to the LED dot matrix.

Encryption device (400), comprising: an encryption unit (403) that is set up when a user secret SKΓ is generated using a secret key MSK of attribute-based encryption and a set of attributes Γ according to a decryption-possible condition L, to generate a key K and a ciphertext P corresponding to key K by encrypting the decryption-possible condition L using attribute-based encryption, where a key PK is used as an encryption key of the attribute-based encryption, consisting of a public key MPK corresponding to the secret key MSK and a public key PQCPK of post-quantum cryptography, to consider a part of the ciphertext P in which the decryption-possible condition L is encrypted on the basis of a secret value as PD and to consider a part of the ciphertext P in which the secret value being shared is encrypted as P-SS, K' and P'-D are generated by randomizing the key K and the PD using a random number R, and to generate a ciphertext C by encrypting data consisting of the PD and the random number R using post-quantum cryptography with the public key PQCPK, wherein The P-SS, P'-D and K' decryption-possible verification parameters correspond to the secret user key SKΓ.