11results about How to "Avoid collusion" patented technology

The embodiment of the invention provides a searchable encryption method, computer equipment, a storage medium and a computer program product, and relates to the technical field of searchable encryption. The method comprises the steps that a cloud server receives a data outsourcing request sent by a data provider; sending the keyword set ciphertext to a trusted execution environment; the trusted execution environment obtains a keyword set plaintext by using the keyword set key; the cloud server forwards the data retrieval request to a trusted execution environment; the trusted execution environment decrypts the combined ciphertext by using a private key in the first key pair to obtain a keyword to be retrieved and a re-encryption key; the trusted execution environment obtains to-be-obtained file data according to the to-be-retrieved keyword; the trusted execution environment obtains re-encrypted file data by using the re-encrypted key, and sends the re-encrypted file data to the data acquirer; and the data acquirer obtains the to-be-acquired file data by using the re-encryption key. According to the method, the data retrieval efficiency is improved, and fuzzy data search is supported.

The invention discloses a primary and secondary fusion column mounted circuit breaker, relates to the technical field of circuit breakers, and aims to solve the technical problem that the isolation knife switch of the primary and secondary fusion column mounted circuit breaker in the northwest region is easy to accumulate dust, and after the dust covers the isolation knife switch, the device is easy to produce a short circuit fault and affect the use effect of the isolation knife switch. The invention comprises an air collection component and a pollution cleaning component arranged above the circuit breaker body, the air collection component and the pollution cleaning component are coordinated, the air collection component comprises a wind receiving component and a wind direction adjustment component, the wind receiving component comprises a support frame, a fixed plate one, a bellows and a fixed plate two, the wind direction adjustment component comprises an air block, a support column and a weather vane, an air duct is arranged at the bottom of the air block, three ventilation ducts are arranged below the air duct, and the output end of the three ventilation ducts is connected to an air outlet duct. The invention has the advantages of avoiding the accumulation of a large amount of dust on the outer surface of the isolation knife switch, ensuring that the outer surface of the isolation knife switch can always maintain a relatively clean state during long-term use.

This invention relates to the fields of federated learning and cryptography, specifically to a secure three-party aggregation method for federated learning in the Industrial Internet of Things (IIoT). The method includes an initialization phase, a training phase, an online phase, and a verification phase. By setting up an architecture with one honest server and two aggregation servers, each server receives a portion of the secret share of local model gradient parameters sent by various IoT devices, thus protecting the privacy of local data. The honest server assists the two aggregation servers in interactively executing a three-party weight calculation protocol to calculate the secret share of the aggregation weights. They also interactively execute a three-party multi-weight aggregation protocol to calculate the secret share of the gradient parameters of the current aggregation model. Furthermore, a linear homomorphic hashing method is used to verify the correctness of the gradient parameters of the current aggregation model. This method solves the problems of low efficiency, weak security, and low robustness in federated learning during model training and aggregation, and can promote data flow and utilization in IoT scenarios.

The invention discloses a cloud server and white box TEE combined security outsourcing computing method, which relates to the technical field of cloud computing data security, and comprises the following steps: system initialization: requesting a user RU to generate a public key pk and a private key sk, splitting the sk into sk1 and sk2, recruiting a cloud server and a trusted execution environment TEE, and establishing a security channel with the TEE; the Server establishes communication with the RU and the TEE; (pk, sk1) is sent to the Server, and (pk, sk2) is sent to the TEE; data encryption: the RU encrypts a plaintext m into a ciphertext # imgabs0 # and sends the ciphertext # imgabs0 # to the Server, and a calculation task is initiated; offline processing: both the Server and the TEE generate a plurality of tuples; online processing: the Server interactively cooperates with the TEE, calculates the # imgabs1 # by using a tuple and a linear and nonlinear privacy calculation protocol to obtain a ciphertext # imgabs2 #, and returns the ciphertext # imgabs2 # to the RU; and returning a result: decrypting the # imgabs3 # by the RU to obtain R. The efficient processing of the data is ensured, the privacy of the data is ensured, and the problem that the TEE is easily attacked by a side channel is solved.

The invention relates to the technical field of production of vacuum insulated panel core materials, in particular to a preparation method of a vacuum insulated panel core material, which comprises the following steps: cutting raw materials by using an airflow feeding type section cutting machine, opening and mixing filaments, carding to form a net, laying the net to form a felt, hot-pressing and shaping, and cutting. According to the preparation method provided by the invention, a dry process is adopted, so that severe hydraulic shearing and mechanical friction damage to fibers caused by wet pulping are avoided; the step of cutting off the raw materials is carried out by adopting the airflow feeding type section cutting machine, the to-be-cut ends of the glass fiber filaments are downwards suspended in a discharging cavity and are attached to structures such as a second feeding roller by utilizing airflow before cutting, cutting point drifting caused by curling and bending of the fibers is effectively avoided, and the cutting efficiency is improved by being matched with cutting of a cutting knife. The length of the short cut filaments is strictly controlled within a required range, the length distribution of the short cut filaments is concentrated, and the problem that the pore uniformity of the core material and the stability of the heat insulation performance of a final product are affected due to non-uniform length of the short cut fibers is solved.

The invention discloses an anti-poisoning federal learning method. The method comprises the following steps: generating a random shared key by a non-interactive key; the hash function and the random shared key generate a shared random number; the shared random number ensures the effectiveness of shared input data; the first server, the second server and the third server verify the consistency of the correlation data; the servers with inconsistent correlation data are excluded; abnormal gradients are filtered through correlation data; and aggregating all legal gradients to complete model updating. According to the method, a client-friendly framework is constructed by adopting a three-server model, and output delivery is ensured. A consistency check is used to detect anomalous behavior. Consistency checking is used for achieving verification detection of input and output, a malicious server is prevented from being communicated with a malicious client side, and poisoning gradients are aggregated.

The invention provides an auction transaction method and device and related equipment, and is applied to a first node, and the method comprises the steps: transmitting a public key of the first node to a second node under the condition that the second node participates in an auction application request for an auction transaction issued by a third node; receiving first information sent by the second node for the auction transaction, wherein the first information comprises first ciphertext information; under the condition that the first ciphertext information is decrypted to obtain bidding information, second information is sent to a third node, and the second information comprises second ciphertext information of the bidding information and a public key of the first node; receiving third information sent by a third node, wherein the third information comprises third ciphertext information obtained by encrypting the auction price information by the third node based on the public key of the first node; and fourth ciphertext information is sent to the second node, the fourth ciphertext information comprises ciphertext information of a first auction result of the auction transaction, and the first auction result is determined by the first node based on the auction price information.

The utility model discloses a scraper chain material carrying prevention device which comprises a scraper, a chain is installed in the scraper in a sliding mode, scrapers matched with the inner wall of the scraper are arranged on the chain at intervals, a stock bin feeding port is formed in the lower end in the scraper, and an adjusting installation base is arranged on the inner side wall of the scraper and located above the chain close to the stock bin feeding port. And the adjusting mounting seat is connected with an air tap aligned with the chain and the feed port of the stock bin through an air pipe. According to the utility model, the air nozzle can be aligned with the chain to blow off material particles attached to the chain, so that the material is effectively prevented from being brought into other bins along with the chain to cause material mixing.

The utility model relates to a gas drainage system which comprises a water seal gas drainer and a gas-liquid separator. The water seal gas drainer is arranged at the gas pipeline which is separated by the gas compressor and is close to one side of the gas conveying source, and the gas-liquid separator is arranged at the gas compressor or the gas pipeline which is separated by the gas compressor and is far away from one side of the gas conveying source. According to the gas drainage device, different condensate water drainage modes are adopted for gas with different pressure grades, so that gas drainage devices with different pressures are adaptive to the pressure, gas carried in condensate water is diffused from a high position, gas leakage, accumulation and communication are avoided, and the gas drainage device has the advantages of being stable and smooth in drainage, simple and convenient to implement and safe and reliable to operate.

The invention provides a power load management simulation practical training device, and belongs to the technical field of load management devices. Comprising a cabinet body, a control center computer is installed on one side of the cabinet body, a general meter is installed on the inner wall of the cabinet body, a junction box is installed at the bottom of the general meter, an indicator lamp is arranged at one end of the general meter, and a shunt detector is arranged in the middle of the inner wall of the cabinet body. According to the invention, through the arrangement of the quick-release safety assembly and the wire spraying assembly, quick connection and disassembly of wires are realized, the flexibility of practical training is improved, code spraying helps to understand the attributes of the wires and reduce misplug, the accuracy and safety of practical training are improved, and at the same time, trainees are prevented from communicating with each other, the strain ability of the trainees is improved, and the practical operation flexibility is improved. Meanwhile, maintenance and rapid recovery of wires are facilitated, circuit faults and equipment damage are avoided, trainees can find self defects, the practical training effect is improved, the damage probability of the practical training device is reduced, and the maintenance cost is reduced.

The utility model relates to the technical field of refining furnace ladle bottom blowing, in particular to a ladle bottom blowing gas medium quick conversion device which comprises a main pipeline, the main pipeline is communicated with a first pipeline, a first movable joint is arranged at the gas inlet end of the first pipeline, and a first valve is installed on the first pipeline. When a gas medium for bottom blowing of the steel ladle is switched, connection between a gas source of unwanted gas and the main pipeline can be rapidly and thoroughly cut off through the first movable joint, and then a gas source of needed gas is rapidly connected into the main pipeline through the first movable joint; the tail end of the gas conveying pipe of which gas is required is connected with the first movable joint of the first pipeline, so that the required gas is introduced into the main pipeline and the air brick, different types of gas are prevented from being communicated, and different types of gas are prevented from being introduced into the bottom of the steel ladle.