115results about How to "Guaranteed Data Integrity" patented technology

PCT No. PCT/EP95/03289 Sec. 371 Date Dec. 10, 1998 Sec. 102(e) Date Dec. 10, 1998 PCT Filed Aug. 18, 1995 PCT Pub. No. WO97/07472 PCT Pub. Date Feb. 27, 1997The inventive concept comprises a system platform for a synergistic, role modular work process environment. A work process object (WPO) (1001) is created, residing in a data base, and stored in a memory of the process and project management computer system (1030). All data concerning the process and project management are reported to said work process object (WPO) (1001) and said work process object (WPO) (1001) is used as a common data base. According to the inventive concept, each view must be supported by a specific workplace, represented by digital data and enforcing the rules for the specific role. A work process information model supports the dynamic definition and use of a data base object representing a work process, boch in its process and project planning modes and its execution. According to the inventive concept, one object supports simultaneously all modes delimited by dynamically moving boundaries. Workplace implementation enforces over-all rules for each role in the inventive system.

The invention discloses a large data inquiring method based on distribution relation-object mapping processing. The method includes the following steps that firstly, m data processing nodes are selected, a Hibernate Session object is constructed for each data processing node, a distributed Hibernate framework is obtained and a Session resource queue is generated; secondly, a configuration file is set, a storage strategy and a routing strategy corresponding to a list of each type are set, an S list with a data volume is backed up at each data processing node, and an L list with a large data volume is stored to the m data processing nodes in a blocking mode; thirdly, an input inquiring request is analyzed and a corresponding processor is selected according to the type of the inquiring request; fourthly, the selected processor selects the corresponding node from the resource queue to process the inquiring request according to the inquiring request, the corresponding routing strategy, and a processing result is protocoled. The large data inquiring method based on distribution relation-object mapping processing can obviously improve the rate of inquiring large data lists.

The invention belongs to the technical field of wireless communication, and specifically relates to a network data aggregation method for a wireless sensor. The method is based on an elliptical curve homomorphic encryption algorithm, a safety outsourcing algorithm and an aggregation signature algorithm based on identity, and is a verifiable wireless sensor network data safety aggregation method. The beneficial effects of the invention are that the method employs the elliptical curve homomorphic encryption algorithm, the aggregation signature algorithm based on identity and the safety outsourcing algorithm to enable a semi-credible aggregator to work in a more severe network environment so as to obtain needed aggregation statistic data; moreover, the method can achieve the functions of confidentiality guarantee, data integrity guarantee, data source authentication guarantee, and replay attack resistance, so the method is better in prospect of actual application.

The invention provides a bad block management method for a flash memory. The method comprises the following steps of: dividing the storage space of the flash memory into a first area comprising a plurality of blocks and a second area comprising a plurality of blocks; performing bad block detection on the flash memory to acquire information about bad blocks; establishing a mapping relation between the bad blocks in the first area and normal blocks in the second area according to the acquired information about the bad blocks, and generating a block mapping quick access table comprising the information about the established mapping relation; and respectively storing the generated block mapping quick access table into a plurality of bad block management information blocks in the second area, wherein a plurality of bad block management information blocks are any normal blocks which are positioned in the second area and do not have the mapping relation with the bad blocks in the first area.

The invention belongs to the technical field of medical alliance chains, and discloses a medical alliance chain lightweight dynamic autonomous cross-chain interaction method. The method comprises thesteps: constructing a cross-chain consensus mechanism based on a threshold digital signature; constructing a cross-chain path certification signature, including group key generation and sharing, threshold subgroup signature generation and path certification updating; and realizing the value transfer among different alliance chain nodes. According to the method, the inter-node communication topology of a medical alliance chain is simplified, a node cross-chain communication model based on an intelligent contract state period and a node cross-chain communication identity credibility path provingconstruction rule are given, and dynamic construction and verification of inter-chain transaction interactive credible path proving are carried out; the consensus process of cross-chain transactionsby a plurality of alliance chain verification node lists is modeled into a threshold digital signature process with a plurality of privilege subgroups, so the alliance chain internal consensus based on the verification node lists is expanded into the inter-alliance chain cross-chain consensus on the premise of not increasing the computational complexity.

The embodiment of the invention provides a data synchronization method and device, an electronic device and a storage medium, and relates to the technical field of computers. The data synchronizationmethod includes the steps of monitoring data operation events occurring in a source database by a trigger arranged in the source database, generating corresponding data operation records based on themonitored data operation events, and synchronizing the source database with a target database according to the data operation records. According to the technical scheme, various data operation eventsoccurring in the source database can be monitored, and meanwhile the synchronization between the source database and the target database can be achieved under the precondition of maintaining data integrity.

The invention relates to the technical field of traceability information security of agricultural products, in particular to a traceability information security solution of agricultural products adopting block chain technology. The method comprises the following steps: an improved consensus mechanism being obtained, wherein the improved consensus mechanism is that when all entity terminals hold blocks to be submitted for verification, in order to maximize their own benefits, no entity terminal can change the verification result of blocks generated by packaging other entity terminals; conducting multi-level traceability information verification; using multi-private-key rules to control access rights; through the improved consensus mechanism, multi-level traceability information verificationand multi-private key rules for access control, distributed bookkeeping being realized. The invention solves the data storage safety problem existing in the agricultural product traceability system.

The invention is a data backup method in computer networks, which belongs to the area of network information technology. The steps are: (1) maintain a backup files list which is dynamically updated; (2) Incremental backup information as well as related system parameters when files in the backup file list are changed, and obtain the difference information with the incremental information and original backup information; (3) bottom hide critical data selected by users; (4) encrypt data when they are remotely backup through network; (5) conduct consistency validation after the data transmission; (6) Get user's configuration for recovery; (7) judge whether system can start the data recovery; (8) conduct data recovery. Get the needed data from the original backup and incremental backup information and recover them to the corresponding paths.

The invention discloses an RFID (Radio Frequency Identification) system capable of ensuring confidentiality and data integrity and an implementation method thereof. The system comprises an RFID tag, an RFID reading-writing module and a background service module, wherein the RFID reading-writing module is used for obtaining a communication key from the RFID tag and carrying out secret data interaction with the RFID tag based on the communication key, and the background service module is used for providing data storage and secret interaction service for the data interaction between the RFID tag and the RFID reading-writing module; and the background service module, the RFID reading-writing module and the RFID tag are sequentially connected. The RFID system capable of ensuring confidentiality and data integrity and the implementation method thereof provided by the invention can overcome the defects of poor security, easiness in failure, poor reliability and the like in the prior art so as to realize the advantages of good security, non-easiness in failure and good reliability.

The invention requests to protect an electronic evidence storage method based on a block chain smart contract, and the method comprises the steps: carrying out the evidence storage through the smart contract by a evidence storage person, carrying out the query of evidence information through the smart contract by a verification person, carrying out the evidence downloading through the smart contract by a researcher, and carrying out the uploading of an evidence analysis result through the smart contract. The smart contract is a key logic module for realizing the method and exchanges data withthe block chain, so that the integrity, the verifiability and the tamper resistance of the electronic evidence are ensured. And meanwhile, all data operations are recorded on the block chain, so thatthe traceability of the electronic evidence is realized.

The invention relates to a method for avoiding losing data in switch process, wherein it is characterized in that: when receiver switches from local wireless access point AP into target AP, it will send buffer information to wireless access point AP; AP based on buffer information processes the data sent to the receiver, via the target AP sends processed data to the receiver. The invention can avoid losing data, confirm data integrality. And receiver STA can switch without complete data transmission by AP, to reduce time delay.

The invention discloses a Redis cluster management method, which comprises the following steps of: when a data access request is monitored, determining a target data partition which is not downtime through a Redis cluster agent component and a data key value in the data access request; routing the data access request to the target data partition, and processing the data key value to obtain a hashslot number; and routing the data access request to a Redis node corresponding to the hash slot number in the target data partition. The invention also discloses a Redis cluster management device, equipment and a readable storage medium. According to the invention, the data integrity and high availability of the Redis cluster can be effectively ensured.

A PCI Express TLP processing circuit (10) comprises: a plurality of reception processing sections (2a1); a transmission processing section (2b); and a multiplexer (2c1) that performs transmission to the transmission processing section, selecting one of the reception processing sections; and at least a reception processing section comprises: a redundancy code generating circuit (12); an LCRC/sequential number detection circuit (13); a buffer memory (14); a packet control circuit section (16) that controls transmission for normal transmission to the transmission destination of the TLP in question or for nullifying transmission; and the transmission processing section comprises: a sequential number generating circuit (19); an LCRC generating circuit (20) and a relay circuit error detection circuit (21), whereby data integrity of the transmitted TLP can be guaranteed.

A data storage system comprises a first platform storage system including a first network interface to communicate with a host computer, a first storage unit to provide storage volumes, a first storage controller to control the first storage unit, and a first memory to store a first control program to process an input/output (I/O) request received by the first platform storage system. A second platform storage system includes a second network to communicate with the host computer, a second storage unit to provide storage volumes, a second storage controller to control the second storage unit, and a second memory to store a second control program to process an I/O request received by the second platform storage system. An external storage system is coupled to the first and second platform storage systems, the external storage system including a third storage unit to provide storage volumes and a third storage controller to control the third storage unit. The first and second platform storage systems are configured to present the storage volumes of the external storage system to the host computer, so that the host computer can access the storage volumes of the external storage system via one of the first and second platform storage systems if the host computer is unable to access the storage volumes of the external storage system via the other platform storage system.

A method and structure for implementing a DRAM memory array as a second level cache memory in a computer system. The computer system includes a central processing unit (CPU), a first level SRAM cache memory, a CPU bus coupled to the CPU, and second level cache memory which includes a DRAM array coupled to the CPU bus. When accessing the DRAM array, row access and column decoding operations are performed in a self-timed asynchronous manner. Predetermined sequences of column select operations are then performed in a synchronous manner with respect to a clock signal. A widened data path is provided to the DRAM array, effectively increasing the data rate of the DRAM array. By operating the DRAM array at a higher data rate than the CPU bus, additional time is provided for precharging the DRAM array. As a result, precharging of the DRAM array is transparent to the CPU bus.

The invention relates to an asynchronous data synchronization method for distributed systems, comprising an information service center and a plurality of clients. The information service center stores synchronization data, and is provided with a synchronization information table. When the data in the information service center changes, a data update message is transmitted to a target in the synchronization information table. The clients update the synchronization data thereof when receiving the data update message. After data updating, the clients notify the information service center of the latest data version. The information service center updates the synchronization information table after receiving the notice. According to the invention, a data synchronization method characterized in that a synchronous end makes a response asynchronously after one end initiates synchronization is adopted, waste of network resources caused by the existing polling synchronization method is avoided, and the amount of system resources needed for data synchronization is reduced. Moreover, the network communication mode of asynchronous data synchronization is more flexible and adaptive, occupation of the communication network is less, and the data integrity and unity of distributed systems are ensured.

The invention belongs to the field of video processing and particularly relates to a video stream cache distribution method and device. The invention aims to solve problems of the waste of a memory space, easy data loss and increased system overhead caused by a fixed length of a cache queue in the prior art. The video stream cache distribution method provided by the invention comprises a step of distributing a memory block containing video data as a cache block and storing the memory block into the cache block, a step of storing the cache block into a data center and storing an address of thecache block into a first address queue, and a step of obtaining the cache block, distributing data in the cache block to a corresponding client, and releasing the cache block. According to the video stream cache distribution method, the memory space can be fully utilized, and the smoothness and integrity of a video are ensured. The invention also provides the video stream cache distribution device, a storage device and a processing device with the above effects.

The invention relates to a method for information synchronization in a distributed system. The method comprises an information service center and a plurality of clients. Synchronous data are stored in an information service center. Synchronous data are stored into the information service center and a synchronization information table is set; when data of the information service center change, a data updating message is transmitted to a target client; after one client receives one data updating message, synchronous data are updated according to data difference information, and an information synchronization completion signal is sent to the information service center after updating; and after the information service center receives the synchronization completion signal, the synchronization information table is updated and then the data synchronization task is completed. According to the invention, a method for data synchronization by initiating synchronization by one terminal and carrying out responding synchronously by a synchronization terminal is employed, so that a defect of network resource wasting existing in the existing polling synchronization way can be overcome; and the system resource quantity needed for data synchronization can be reduced. Moreover, the data synchronization updating can be carried out timely and data integrity and uniformity of the distributed system can be guaranteed.

The invention discloses a DCT algorithm-based method for digital image watermark embedment, which comprises: a first step of reading an original public image and a light and shade watermark image into two-dimensional arrays I and W respectively; a step two of dividing the original public image I and the watermark image W into 2*2 image blocks which do not cover each other respectively, computing the average gray m and a variance sigma of the sub blocks, and performing the DCT conversion of the sub blocks of the public image; a step three of embedding one element W(p,q) in the light and shade watermark in a sub block with a complex texture; a step four of performing the inverse DCT conversion of image blocks embedded with watermark information; and a step five of combining image the image blocks to obtain an image embedded with the light and shade watermark. The method is characterized by counterfeit prevention, falsification prevention, verification, and data security and integrity guarantee.

The invention discloses a method and a system for complementarily reporting performance data, wherein the method comprises: storing the performance data which is collected into a local operation and maintenance center by a data collecting module, reporting a data transmitting module to transmit the performance data from the local operation and maintenance center to a high authority network management center, selecting part of or whole performance data from the performance data by the data transmitting module, transmitting the part of or whole performance data to an appointed position when the part of or whole performance data can not be transmitted to the high authority network management center, obtaining the part of or whole performance data from the appointed position by a data complement sampling module when the part of or whole performance data can be transmitted to the high authority network management center, and transmitting the part of or whole performance data to the high authority network management center.

The invention discloses an environmental pollution monitoring and managing system of a construction site. The environmental pollution monitoring and managing system comprises a field monitoring system and a remote real-time monitoring system. Field pollution monitoring is a core, the field monitoring system comprises a field monitoring platform of the construction site, the field monitoring platform of the construction site comprises a construction environment comprehensive detector and a data host, the remote monitoring system comprises a management platform, a data storage system and an accident handling system, the system is developed by the aid of a multilayer architecture technology on the basis of a .NET technology of the Microsoft, and a multilayer distribution architecture mainly comprises a presentation layer, a logic layer, a data access layer and a data storage layer.

The invention belongs to the field of ink-jet printing and particularly relates to an anti-error consumable chip and a control method thereof. According to the technical scheme, the anti-error consumable chip comprises a chip control circuit and a data storage unit for storing data. The data storage unit comprises an ROM region and an RAM region. The ROM region comprises a main data region and a backup region. The RAM region is used for temporarily storing write-in data transmitted to the anti-error consumable chip by a printer. Initial data is preserved in the main data region. The backup region is used for preserving the initial data. The main data region can receive the write-in data from the RAM region and covering and replacing the initial data with the write-in data. According to the anti-error consumable chip and the control method thereof, even though under certain abnormal conditions, the data storage unit of the consumable chip goes wrong, a system can restore normal data, and normal use of consumables is not affected.

The invention discloses a TWS earphone based on a monitoring scheme and an implementation method thereof, and the earphone comprises a main earphone which is in communication connection with an intelligent device, adds a timestamp to a received data packet through a Bluetooth clock, obtains corresponding SEQN information, obtains a set of {SEQN, timestamp} of an auxiliary earphone for representingthe receiving condition of the data packet, and transmits the data packet to the intelligent device according to the set of {SEQN, timestamp}, finds out a lost packet of the auxiliary earphone according to the timestamp and the SEQN information and sends the lost packet to the auxiliary earphone; the auxiliary earphone which is used for adding timestamps to the data packets received in the monitoring link through a Bluetooth clock, obtaining corresponding SEQN information, representing the data packet receiving condition of each received data packet through a set of {SEQN, timestamps}, sending the set of {SEQN, timestamps} to the main earphone after receiving a request of the main earphone, and sending the set of {SEQN, timestamps} to the main earphone; and inserting the lost packet withthe timestamp forwarded by the main earphone into the received data packet sequence when the lost packet with the timestamp forwarded by the main earphone is received.

The invention discloses a packet reissuing method and system for group communication, and the method comprises the steps: sending a message which is used for suggesting the establishment of a unicastbearer to a server when user equipment detects the loss of a data packet of the group communication, the unicast bearer being used for reissuing the lost data packet, and the message carrying corresponding data packet loss information; enabling the server to establish a unicast bearer for the user equipment according to the message; and enbaling the server to utilize the unicast bearer to retransmit a lost data packet indicated by the data packet loss information to the user equipment. By adopting the method and the device, the packet loss problem of group communication can be effectively solved, and the data integrity of the group communication is ensured.