8341results about How to "Achieve protection" patented technology

An over-power protection apparatus with programmable over-current threshold for a power converter is provided. The over-power protection apparatus further provides an over-temperature threshold for protection purposes. The over-power protection apparatus is able to achieve over-power and over-temperature protection in response to the level of the driving signal of the power converter. In addition, the programmable over-current threshold of the present invention can be adjusted in response to various load conditions.

The present invention provides a flexible Ethernet lane management method and apparatus. The method comprises the steps of when OAM information of a PCS Lane is acquired, acquiring a target FlexE Client corresponding to the PCS Lane according to a pre-acquired correspondence between the PCS Lane and the FlexE Client; and determining OAM information of the target FlexE Client according to the OAM information of the PCS Lane.

The invention provides a centralized digital transformer substation system. By adopting various new technologies and new devices, a new level centralized multifunctional intelligent device and a system are realized, thereby laying the foundation for the construction of a digital electric network. Based on an IEC 61850 standard, high speed Ethernet exchange and a virtual local area network (VLAN) technology, the system constructs a digital transformer substation information model and a communication network, and realizes sharing of information of the whole substation. On the basis, function integration of a digital transformer substation is realized and a system structure is simplified. A bay level multifunctional intelligent electronic device, i.e. a system controller integrates the functions of protection, measurement and control, wave recording and the like into a whole, and greatly simplifies the bay level device and wire connection; a process level intelligent terminal integrates the functions of a merging unit and an intelligent operation box into a whole; and all devices of each level provide models and interfaces conforming to the IEC 61850 standard.

The invention discloses a fingerprint identifying system which comprises three large parts of a fingerprint database, a central server and a client terminal; the fingerprint database is mainly used for memorizing the fingerprint characteristic information after digital coding; the central server is mainly responsible for validating the validity of the client terminal, receiving the fingerprint characteristic data, comparing the characteristics and returning the fingerprint identifying result; the client terminal is mainly responsible for collecting the fingerprint, extracting and uploading the fingerprint characteristic data. The system overcomes the defects of the prior art, can provide an online/offline fingerprint identifying system the basic algorithm library of which can be seamlessly expanded and the functions of which can be selected and matched. The fingerprint identifying system can lead a user to obtain the ID identification and authentication services with high quality under the situation of not needing a great amount of capital investment.

The invention discloses a sensitive data protection system of the data circulation and transaction of a big data platform. The sensitive data protection system is characterized in that the sensitive data protection system of the data circulation and transaction of the big data platform comprises a data collection module, a data sharing module, a data exchange module, a data acquisition module and a desensitization management module, wherein the data collection module discovers sensitive contents in data collection and carries out protection processing on the sensitive contents; the data sharing module carries out the protection processing on the sensitive data in a data sharing process; the data exchange module carries out desensitization processing on a relative sensitive data configuration desensitization strategy in a data exchange process; the data acquisition module protects a data file downloading link and a storage address in a data acquisition process; and the desensitization management module manages, monitors and audits the desensitization and the protection processing of the sensitive data. The invention also discloses a sensitive data protection method of the data circulation and transaction of the big data platform.

The present disclosure proposes a block chain-based data processing method, apparatus, storage medium, and electronic device for protecting a private transaction of a block chain node. The method includes: receiving a block in a blockchain network; the block includes a sub-block, the sub-block includes data corresponding to the smart contract code and the smart contract code; and obtaining the private key from the management contract by using a pre-acquired private key a secret key; obtaining a smart contract code in the sub-block according to the secret key, so that the first block chain nodeexecutes the smart contract code; encrypting and writing the data generated by the smart contract code and the block chain node to execute the smart contract code In the block; the sub-block is written into the block of the block chain node.

The invention discloses a threat detection and defense device, system and method for an industrial control system. The threat detection and defense device, system and method is used for protecting safety of the industrial control system. The threat detection and defense device comprises a threat detection module and an exception handling module, wherein the threat detection module is used for intercepting and capturing a communication data message, identifying message field information in the communication data message, judging whether the communication data message is the malicious message according to the message field information, judging whether malicious act against a local upper computer or malicious act initiated by the local upper computer exists according to the message field information and message field information in a communication massage recorded in a local communication log database and detecting whether malicious operation against a control program in the local upper computer exists; the exception handling module is used for triggering and performing corresponding safety operation according to safety configuration files if one or more of the malicious message, the malicious act against the local upper computer, the malicious act initiated by the local upper computer and the malicious operation against the control program in the local upper computer exist.

The invention discloses a document monitor and management system based on comprehensive safety audit, comprising a document safety management center module, a network probe auditing module, a terminal accessing and auditing module and a linkage module. In the system, a core switch is connected with a plurality of secondary switches; each secondary switch is connected with a plurality of user terminals; and the terminal accessing and auditing module is provided in each user terminal. Based on the invention, the defect of the prior art is overcome and the safety of the document is ensured effectively.

The invention discloses a starting power generation system for an electric automobile, which comprises a double salient pole starting power generator, a starting power generation controller and controller working power; the starting power generation controller comprises a bidirectional power conversion circuit, an exciting current detection unit, an output current detection unit, an output voltage detection unit, a position rotation speed detection unit, an armature current detection unit, an exciting main circuit and a digital signal processor, wherein the exciting main circuit includes an exciting relay, a rectification filter unit and a chopper circuit which are connected in series in turn; and the digital signal processor is connected with the exciting current detection unit, the output current detection unit, the output voltage detection unit, the armature current detection unit, the position rotation speed detection unit, and the control ends of the bidirectional power conversion circuit, the exciting relay and the rectification filter unit by signals respectively. The invention also discloses an electric automobile and a control method thereof. Compared with the prior art, the starting power generation system is simple in structure, low in cost and flexible to control.

The invention discloses a process for repairing water erosion damage of a flow passage component of a steam turbine and protecting the flow passage component of the steam turbine. In the process, molded lines of the flow passage component of the steam turbine are repaired by adopting copy overlaying of manual argon tungsten arc welding aiming at the phenomenon of the water erosion damage existing in the flow passage component of the steam turbine. A water erosion resistant coating is prepared by supersonic speed flame spraying so as to achieve the purposes of repairing the molded lines of the flow passage component of the steam turbine and protecting the molded lines at large area on line and prolonging the service life of the flow passage component of the steam turbine. Through the process of the invention, the flow passage component of the steam turbine can be repaired and protected at large area on line in a short time without changing vibration characteristic, steam-driven characteristic and strength characteristic of the flow passage component of the steam turbine, so that the process has the advantages of high on-site operability, small deformation of the repaired workpiece, remarkable improvement on water erosion resistance and the like, can solve the common problem of water erosion in the flow passage component of the power station steam turbine in service on site, improves the running safety and efficiency of units and increases economic benefit of a power plant.

Disclosed herein is an encryption and decryption communication semiconductor device comprising at least, a communication interface for performing a transfer of data according to a predetermined communication system, one or two or more encryption/decryption circuits which encrypt or decrypt input data in accordance with a predetermined algorithm, and a plurality of external interfaces for performing the input/output of data from and to external devices. The communication interface, the encryption/decryption circuits and the plurality of external interfaces are formed on one semiconductor chip. In the cryption and decryption communication semiconductor device, input data sent from any one of the plurality of external interfaces is encrypted or decrypted by at least one of the encryption/decryption circuits and is capable of being outputted to any different one of the plurality of external interfaces.

In a positional information providing method, an information sending server transmits desired decision positional information and unique information on a designated mobile terminal device to a positional information providing server, and a mobile terminal device transmits unique information thereon to the positional information providing server, and when the designated unique information and the unique information agree with each other, the positional information providing server makes a decision as to whether or not there is a point of agreement between the decision positional information and the positional information on the mobile terminal device and, when the decision indicates that there is a point of agreement between the decision positional information and the positional information on the mobile terminal device, the positional information providing server notifies the decision result through a network to the information sending server, thereby providing the positional information.

The invention relates to a mutual authentication method between a terminal and a server. The method comprises that: the terminal generates an identity number and a first random number and sends the identity number and the first random number to the server; the server verifies whether the identity number exists in a database of the server; the server generates a first operation result according to the identity number, the first random number and a server secret key, and the first operation result and a second random number are transmitted to the terminal; the terminal generates a second operation result according to the identity number, the first random number and the server secret key and carries out authentication on the server according to the first and second operation results; the terminal generates a third operation result according to the second random number and a terminal secret key and sends the third operation result to the server; and the server generates a fourth operation result according to the second random number and the terminal secret key and carries out authentication on the terminal according to the third and fourth operation results.

The embodiment of the application discloses a method and apparatus for controlling a smart home appliance. One specific embodiment of the method includes steps: recognizing whether a sound is a voicein response to detection of the sound; if yes, recognizing identity information of a user emitting the sound, and determining whether the user is a legal user according to the identity information; performing speech recognition on the sound in response to determination that the user is the legal user, and obtaining a control instruction; and executing the control instruction in response to determination that the control instruction is an instruction matched with the identity information. According to the method and apparatus, security management and control of the smart home appliance and security management and security protection of a speaker can be realized.

The invention belongs to the technical field of medical data management, and relates to a medical record storage, sharing and security claim settlement model and method based on a block chain. Firstly, credible sharing of medical data of patients among medical institutions is achieved through the blockchain technology, and a lifelong medical record is established for the patients; based on a Hashchain type storage structure, the medical data cannot be tampered; secondly, an improved CP-ABE-based cryptographic primitive SHDPCPC-CP-ABE is proposed, security encryption and fine-grained access control on the medical data are realized, and a patient can conveniently and efficiently access and authorize a medical institution to read the medical data; and finally, a Paillier homomorphic encryption technology is utilized to realize safe medical insurance claim settlement, and the privacy of the patient is protected when the patient interacts with a third-party non-medical institution. According to the invention, security, confidentiality, reliability and integrity of medical data can be realized, and confidential sharing of private data is supported.