33results about How to "Reduce update overhead" patented technology

The present invention proposes a user revocation access control method based on proxy re-encryption, including: when the user is about to withdraw from the system, the attribute management organization associated with the user attribute generates relevant parameters for key update; The access private key of the user has not been revoked, so that the system receives the data access request of the user who has not been revoked; the attribute management agency sends the key for information ciphertext update to the cloud service area, and the cloud server The ciphertext whose attributes have been revoked is updated; the user and its related data are deleted from the accessible user list in the system, so as to revoke the user's access right to the system. The present invention only updates the ciphertext related to the revoked user attributes, instead of updating all ciphertexts, thereby reducing the communication overhead of the entire system, improving the operating efficiency of the entire system, and ensuring the security of the system .

The embodiment of the present invention discloses a spatial keyword indexing method. The method includes: constructing a two-layer index structure according to a preset space division method; wherein, the two-layer index structure includes: a data index layer and a data storage layer, and the data The index layer is used to index data blocks stored in the data storage layer; based on the double-layer index structure, the acquired query conditions are indexed with spatial keywords to obtain index results; wherein, the query conditions include query keywords.

The invention relates to a multi-agent dynamic data source management method. When data content is generated in a network, the Provider sends a Register report containing both content names and signature information to all mobile proxy servers MAs in the network; after the MAs receive the Register report, the Provider calculates the data source request mobility PRMR value of the self-carried content; according to the PRMR value, either the binding updating mode or the caching processing mode is adopted. According to the invention, movement updating of the data source is carried out among a plurality of agents, corresponding management strategies are adopted according to different communication modes, content caching is performed reasonably, switching time delay caused by movement of the data source is reduced by making the best of the network property, the data network properties are optimally denominated, the network updating expenditure is reduced, and the mobility of the data source is supported.

Embodiments of the present invention provide a rule set updating method, device, and rule matching method and device, which relate to the field of computer technology, and are applied to a three-state content addressable memory, wherein the rule set updating method includes: dividing the three-state content addressable memory In each of the first rule groups obtained from the target rule set, determine the target rule group to which the target rule belongs; then insert the target rule into the target rule group to complete the update of the target rule set. Wherein, for any rule that has an intersecting relationship in the target rule set, the number of rules intersecting it in the first rule group is not greater than the total number of rules intersecting it in the target rule set. When the solution provided by the embodiment of the present invention is applied to update the rule set, the update overhead of the rule set can be reduced.

The invention provides a time-sensitive anomaly detection method based on the nearest neighbor in a large data flow, which belongs to the technical field of large data flow and anomaly detection. The core is a statistical estimator based on LSH sampling view, and the sliding window uses a definite The model will estimate and determine the count and variance of multiple random time intervals in the wave window to monitor the distribution of data in different time intervals. It can quickly find the neighbors of each data in a large data stream, reduce computational overhead, and do not need to separate each data Save its neighbor information, save space, improve update efficiency, and quickly judge whether the data distribution is abnormal and the time range when the abnormality occurs based on time sensitivity.

The invention discloses a hybrid cloud storage method based on multi-level cache. The method comprises the following steps: a user joins a user group for login according to the local area network where the user is, and sends a user name and a password for user authentication to a super node of the region where the user group is, the super node achieves authentication of the user according to the received user name and password, the user receives a catalog view returned from the super node and metadata information of all files and sends the catalog view to a group leader node of the user group, the group leader node judges whether the buffer memory space of the group contains files in the catalog view according to the received catalog view, and if yes, feeds the IP address of the node in which the files are saved in the buffer memory space of the group to the user, and the user determines the optimal access path of each file in the catalog view according to the received feedback information. The hybrid cloud storage method allows the user to access data from the user group cache and the super node layer cache which have lower network delay, thereby lowering the network delay of the user data access.

The invention discloses an optimization processing method for an error correcting code in a solid state disk system. The optimization processing method is characterized by comprising the steps of combining a plurality of continuous logic data pages into a data page group, storing data pages and overlong error correcting codes in a flash memory according to a page view, and intensively storing the overlong error correcting codes of a data page group in the flash memory into a special flash memory page. According to the method, the read-write visiting time is saved, the problems of read amplification and high visit expense caused when the data pages in the other flash memory page are read are avoided, and the integral performance of a solid state disk is optimized. The invention further discloses application of the optimization processing method. By virtue of the method, the read and write caching algorithms are optimized; by caching the overlong error correcting codes, the cache hit ratio is increased; and by virtue of batch write-back of the overlong error correcting codes of multiple data pages, the updating expense is reduced, furthermore, the integral performance of the system is improved, and the service life of the solid state disk is prolonged.

The invention relates to a family member health archive management method. The method comprises the following steps that S1) family member health information is collected; S2) the family member healthinformation is filled automatically; S3) the family member health information is stored, and the safety of the family member health information is protected; S4) health conditions of family members are evaluated, and customized information is presented in a focused way on the basis of an evaluation report; and S5) a doctor-seeing risk of a specific family member is evaluated. The method is suitable for family member health management, the cost of a synchronized update method is low, information in all mobile terminals can be updated needless of addition of control nodes, synchronization is confirmed only when there is essential update, selection is made selectively, the update cost is reduced, and the doctor-seeing risk aimed at the health condition of the specific family member can be prompted.

The present invention proposes a content source mobility support method based on active forwarding in a CCN network. The method includes: before the mobile switching of the content source, determining a new access point to which the content source moves and switches according to a preset mobile switching strategy, and Send the interest message to the original access router of the content source; after receiving the interest message, the content source forwards the data message containing the requested content to the user who requested the content provided by the content source; after receiving the interest message, the content source forwards the data message containing the requested content The content of the data message to the user. The invention overcomes the defect of communication interruption caused by content source mobile switching in the prior art, and ensures the continuity of communication in the CCN network; users can obtain the content provided after the content source mobile switching in a relatively short period of time; the content can be reduced The routing update overhead introduced by source mobility handover has better routing expansion performance and higher message forwarding efficiency.

The invention discloses a group key managing method based on Chinese remainder theorem. The method comprises the steps of: dividing a group into a plurality of subgroups, managing member subgroups by a subgroup key manager, managing SKS subgroups by a total group key manager; providing the member information for the subgroup key manager by the group members; allocating the subgroup keys to the member subgroups by the subgroup key manager, and allocating the subgroup keys of the SKS subgroups by the total key manager; after the subgroup keys are allocated, allocating the group keys by the total group key manager and the subgroup key manager; carrying out precalculation on the public data in the updating interval by the subgroup key manager, and updating the subgroup keys by the subgroup key manager after the group members are changed; after the subgroup keys are completely updated, updating the group keys by the subgroup key manager; in the whole process of the group communication, continuously updating the subgroup keys in a updating mode by the SKS subgroup based on time. The invention has the advantages of high safety, low updating cost and little updating delay, and can be usedfor large-scale group communication system.

The invention discloses an internal memory dotting-based data calling method for an acquisition system, which relates to the technical field of information. The conventional large-sized acquisition system cannot improve search efficiency and reduce system overhead at the same time. The method is characterized in that: the system is provided with a calling server; the calling server is provided with an initialization module, a dotting module and a calling module; the initialization module periodically generates a next day dotting table in an internal memory; the dotting module dots at a corresponding position of the dotting table after a front-end processor informs the calling server of the receiving of a message; and the calling module calls information in the dotting table to call miss points according to the requirement on calling time. Dotting is performed on the dotting table of the internal memory, so that updating overhead of the dotting table is lowered and dotting table inquiry speed is high. The method is suitable for calling miss points of a large-sized acquisition system.