62results about How to "Achieving verifiability" patented technology

A method for named-entity (NE) recognition and verification is provided. The method can extract at least one to-be-tested segments from an article according to a text window, and use a predefined grammar to parse the at least one to-be-tested segments to remove ill-formed ones. Then, a statistical verification model is used to calculate the confidence measurement of each to-be-tested segment to determine where the to-be-tested segment has a named-entity or not. If the confidence measurement is less than a predefined threshold, the to-be-tested segment will be rejected. Otherwise, it will be accepted.

The invention provides a physical memory isolation method based on an RISC-V instruction architecture. According to the method, on the basis of an existing PMP (physical memory isolation) technology capable of being configured by a Machine mode of an RISC-V instruction architecture, an sPMP (physical memory isolation) technology capable of being configured by a Supervisor mode is added; the physical memory isolation technology sPMP depends on a plurality of groups of sPMP registers which can only be read and written by a Machine mode program and a Supervisor mode program. According to the invention, the limitation of the number of security applications of the existing TEE system based on the PMP register set is broken through, and the characteristics of efficient security application starting, efficient security application communication, fine-grained security application memory resource allocation and the like can be provided. Compared with the existing TEE design, the safety and theexpandability of the system are greatly improved.

A network extension device comprising a CPU, memory, protected I/O connectable to local controls and peripherals, external communications port, a trusted device connected to the CPU such that it can provide attestation of the network extension device's trusted operation to a connected known external network, and a protected interface connected to at least one network extension module that includes a local network communications port. Optionally, a traffic encryption module may be provided, and the trusted device's attestation may include a check of its operation. Also, a method comprising connecting the network extension device to an external network, performing an operating mode check, causing the network extension device to operate in a mode and perform a security check that correspond to the result, causing the trusted device to attest trusted operation to the external network and thereafter causing the CPU to function fully and permitting access to the external network.

The invention belongs to the technical field of data encryption and privacy protection, and discloses a verifiable ideal on-grid threshold proxy re-encryption method and system, and the method comprises the following steps: generating a first public and private key and a second public and private key through a KeyGen algorithm; encrypting the original message according to the first public key to generate a ciphertext; generating an agent key through a ReKeyGen algorithm according to the first private key and the second public key, dividing the agent key into a plurality of key shares, and signing each key share through a homomorphic signature technology to obtain a plurality of key share signatures; converting the ciphertext into a plurality of ciphertext shares according to the pluralityof key shares, and converting the plurality of key share signatures into a plurality of ciphertext share signatures; verifying the legality of the corresponding ciphertext share according to each ciphertext share signature; combining the legal ciphertext shares into a re-encrypted ciphertext; decrypting the re-encrypted ciphertext according to the second private key to get the original message. According to the invention, the method and system have the advantages of high availability, low trust and strong security, can effectively resist quantum attacks, and is high in encryption efficiency.

The invention provides a secure outsourcing algorithm for large-scale matrix operation, which adopts a continuous sparse 11-module matrix transformation encryption technology with a simple structure.On the one hand, multiple sparse transformations can encrypt dense matrices continuously, thus protecting the statistical information of specific elements of the original matrices; On the other hand,the combinability of matrix multiplication and the simplicity of sparse matrix structure ensure the high efficiency of matrix encryption and decryption. In addition, the technology has good universality, suitable for outsourcing MM, MIC, MDC and other matrix operations, giving good consideration to the privacy of input and output, high efficiency verifiability and efficiency.

A mobile terminal E-voting method based on facial feature recognition comprises the following steps: (1) data of a voting server SS is initialized; and (2) a mobile terminal starts to vote. A voter needs to pass cross validation of a system during the voting process, and the process is as follows: (2.1) first validation: after first validation, jumping to a login interface and starting login certification which needs a voting code T_codei, equipment T_UUIDi and a face photo T_pici, wherein the voting code T_codei is obtained by a user from a mail-box T_maili and obtaining a voting code from the mail-box is second validation; and the equipment T_UUIDi is automatically obtained by an APP from equipment and the face photo T_pici is shot by an APP camera; (2.2) second validation: entering the voting code T_codei obtained from the mail-box T_maili; (2.3) third validation; and (2.4) voting. The invention also provides a mobile terminal E-voting system based on facial feature recognition. The method and the system consider both high security and high confidentiality and are convenient to use.

The present arrangement provides a method for monitoring the performance reliability of a control unit and/or at least one sensor of a safety device for the protection of vehicle occupants, comprising the steps that a negative acceleration or velocity caused by an impact, in particular, be recorded; a value for the impact severity be derived from the recorded acceleration or velocity; and the value for the impact severity be compared to a predefined threshold value. If the value for the impact severity exceeds the predefined threshold value, an error-function signal will be output, which indicates that the proper functioning can no longer be ensured for the control unit and/or for at least one sensor. The present arrangement also relates to a diagnostic device for such a method.

The invention discloses a symmetric searchable encryption method and device, equipment and a medium. The method comprises the following steps: encrypting a target plaintext file to obtain a ciphertextfile; creating a file index table based on the target plaintext file and a hash chain structure, wherein the file index table comprises an accumulative verification label and a continuously updated search trap door; and uploading the ciphertext file and the file index table to a cloud server, so that the cloud server feeds back the ciphertext file and the verification label corresponding to the search trap door to the search client based on the file index table after receiving the search trap door sent by the search client, wherein after the search client receives the ciphertext file and theverification label, the correctness of the ciphertext file is verified based on the verification label. According to the invention, the forward security and the complete verifiability of data search can be realized at the same time by creating the obtained file index table containing the accumulative verification label and the search trap door which is continuously updated.

The invention discloses a network system safety protection method, which comprises the steps of performing information collection according to a received protection instruction to obtain network system information; vulnerability detection is carried out on the network system information to obtain network vulnerabilities; attacking the network vulnerability by using a preset automatic attack model;obtaining an attack result corresponding to the successfully attacked network vulnerability; performing vulnerability repair on the network vulnerability according to the attack result; the network system safety protection method can effectively realize automatic, verifiable, high-efficiency and high-precision penetration test and real-time system defense. The invention also discloses a network system safety protection device and system, and a computer readable storage medium, which all have the above beneficial effects.

The invention discloses a medical certificate credible issuing and verification system and method based on a blockchain, and the system comprises a node management module which is used for the building and maintenance of a medical conjoined blockchain network architecture, including the initialization and dynamic supervision of a member organization structure in a network, registration of medicalcertificate issuing institution nodes, creation of member services, and deployment of network function components according to function requirements; an identity authentication module which is used for issuing medical certificates of medical staff and auditing and filing identities of certificate inspectors; and a query module which is used for carrying out authorization examination on the certificate query application of the examiner and providing a certificate examination service of an application access control mechanism at the same time. According to the system, firstly, credibility of themedical certificate content and the issuing process thereof is realized; secondly, bidirectional verification and authorized access in the certificate checking process are realized, and the privacy security of system participation users is guaranteed; and finally, realizing a support framework for transaction processing right control between internal entities of the medical alliance and member institutions of the medical alliance.

The invention discloses a safety anti-counterfeiting system and method based on two wireless radio frequency tags. The system comprises a tag issuing device, an object tag, an owner tag, a tag validator, a data server and a database, wherein both the object tag and the owner tag are issued by the tag issuing device and authenticated by the tag validator; data in the tag issuing device and the tagvalidator are synchronized through the data server; the data server is connected with the tag issuing device, the tag validator and the database; and the owner tag and the object tag are issued in pair so as to form a tag pair.

The invention relates to the field of identity authentication, and discloses an electronic contract generation method and device, computer equipment and a storage medium, and the method comprises the steps: sending a to-be-signed electronic contract to a client after first safety verification information and second safety verification information sent by the client pass verification; receiving an electronic contract containing a handwritten signature returned by the client, and verifying the handwritten signature; if the handwritten signature passes verification, obtaining signature coordinates of the handwritten signature; obtaining recognizable biological characteristic information of the customer from the first security verification information and/or the second security verification information; and adding recognizable biological characteristic information at a specified relative position of the signature coordinate, and generating an electronic contract added with the recognizable biological characteristic information. According to the invention, the effectiveness of the electronic contract can be ensured, the operation cost of a client is reduced, and the signing efficiency of the electronic contract is improved.

The invention relates to a quantum secret voting method based on a single particle. The quantum secret voting method is applied to a voting environment composed of a voting mechanism, a voter, a voterand an OADM. The OADMs are connected through optical fibers to form an annular classical quantum information fusion channel; wherein the voting mechanism, the voter and the voter are connected with an OADM and are connected to a classic quantum information fusion channel through the OADM to form a node so as to carry out information transmission between any nodes; the voting mechanism and the voter are assumed to be semi-honest, the voter is not limited to be semi-honest, in the voting process, the voting mechanism and the voter can check the identity of the voter, and identity certificates and quantum resources are distributed to the qualified voter; the voting institution and the voter respectively carry out trust detection with the voter, and the voter and the voter verify the identities of each other; the voter votes and sends the vote sequence to the vote counter; and after the voter completes voting, the voter counts votes and publishes a voting result.

The invention discloses a multi-biological feature authentication or identification-based method and system. The method comprises the following steps of: acquiring a plurality of groups of biologicalfeatures of a first target object set and obtaining biological feature values; in order to recognize each biological feature, distributing a biological feature identifier for each biological feature;establishing a mapping relationship between each biological feature identifier and a preset mapping code set; and after an authentication code or an identification code formed by mapping codes corresponding to a part or all of the biological feature identifiers is determined, carrying out authentication or identification according to the authentication code or the identification code. According tothe system and method, the problem that biological features of natural persons are abused as the biological features of the natural persons are leaked or the using of the biological features of the natural persons is not controlled by the natural persons is avoided, the confidentiality and verifiability of safety information are improved, and the non-repudiation is improved at the same time.

The invention discloses a multi-authorization attribute-based verifiable encryption method based on a block chain, belongs to the technical field of block chain data privacy protection security, and is suitable for one-to-many data sharing and fine-grained access control. The method comprises the following steps: firstly, a data owner uploads encrypted data to a cloud end by using a system public key, and uploads a data ciphertext hash value and an access strategy to a block chain; and the cloud storage server is responsible for receiving and storing the ciphertext. Secondly, the data user receives the attribute key distributed by the multi-attribute authorization center and can verify the correctness of the key; and the block chain performs identity authentication on the data user, and returns an authentication result to the cloud server. And finally, only the legal user whose attribute private key accords with the access strategy can download the data from the cloud and verify whether the data is tampered or not.

The invention discloses a verifiable range query method based on ciphertext spatio-temporal data. The method comprises the following steps: step 1, a data owner generates different keys required in the whole verifiable range query process; step 2, a G-tree index structure is constructed by using a Hierachic cell based encoding algorithm, and the G-tree index structure is used for representing a G-tree index; 3, converting a query range request corresponding to spatio-temporal data sent by a query user into a prefix set in the G-tree index structure, and storing the prefix set into an accumulator to obtain a trap door of the range query request corresponding to the spatio-temporal data; and step 4, the cloud server searches the G-tree index structure according to a range query trap door corresponding to the spatio-temporal data to obtain a search result and verification information, and a query user verifies the search result to obtain the integrity of the search result. According to the method, the range query and verification of the ciphertext spatio-temporal data can be realized at the same time, the calculation overhead is reduced, and the query and verification efficiency is relatively high.

The embodiment of the invention provides a message source verification method and device. The method comprises the steps that a notification message to be verified is acquired, wherein the notification message includes the message content and the actual message signature; the target public key certificate acquired by the message source indicated by the message content is acquired; the standard message signature of the message content is generated by using the target public key certificate; and the actual message signature of the notification message to be verified is judged to be consistent with the standard message signature so that the notification message is ensured to be from the message source indicated by the message content. The reliability of the message source of the notificationmessage can be identified so that the risk of property loss caused by the fact that the forged and fake message source is difficult to be identified by the user can be reduced.

The sheet feeding device includes a housing, first and second feeding paths, and first and second covers. The first feeding path extends in a vertical direction within the housing. The second feeding path extends in the vertical direction within the housing, and a lower end thereof is connected to an upper end of the first feeding path. The first cover, in which an upper side is openable/closable relative to the housing with a lower side as a fulcrum, exposes, in an open state, the first feeding path outside of the housing. The second cover, in which an upper side is openable/closable relative to the housing with a lower side as a fulcrum, exposes, in an open state, the second feeding path outside of the housing. When both the first cover and the second cover are opened, the first cover and the second cover are respectively in the open state relative to the housing in a mode where a second opening angle of the second cover relative to the housing is smaller than a first opening angle of the first cover relative to the housing.

The invention belongs to the field of quantum cryptography, and particularly relates to a secure multi-party computing method based on verifiable blind quantum computation. The secure multi-party computing method comprises the three stages that the first stage is a preparation stage, and in the preparation stage, an S (T) graph is systematically generated and generated quantum bits are subjected to data encryption processing; the second stage is a calculation stage, and the final output quantum state is calculated according to the actually measured angle by calculating the actually measured angle; and the third stage is an output stage, in the output stage, trap quantum bits are checked through Alice to determine a correct calculation result, and the result is output. According to the method, the number of participated clients is expanded from two clients to multiple clients, the requirement of multi-party calculation can be met, and the method has higher expansibility and practicability.