1461 results about "Hash function" patented technology

The invention provides an identity information dynamic desensitization method and system based on SM4 and SM9 algorithms, and the method comprises the steps: carrying out the data segmentation of original identity information, and obtaining sensitive segment information and common segment information; performing key dynamic generation based on an SM4 algorithm, and encrypting the sensitive segment information to obtain encrypted sensitive segment information; extracting a feature value of the common segment information through a preset hash function, and converting the feature value into coded data in a preset format to obtain converted common segment information; splicing the converted common segment information and the encrypted sensitive segment information to obtain preliminary desensitized data; and encrypting the preliminary desensitized data based on an SM9 algorithm to generate an encrypted ciphertext, and embedding a unique identity identifier associated with the original identity information into the encrypted ciphertext in an encryption mode to obtain desensitized identity information. According to the invention, the dynamic desensitization of the identity information can be realized, and the data format can be kept unchanged.

The invention discloses an airport intelligent service question answering method and system based on AI, relates to the technical field of artificial intelligence, and comprises the steps of performing combined modeling by using a time sequence and a multi-head attention mechanism, extracting key behavior characteristics, fusing intention recognition and behavior prediction, and improving the answer reasoning accuracy. The method comprises the following steps: selecting a semantic knowledge base, constructing deep semantic representation and accurately matching the deep semantic representation with the semantic knowledge base, extracting high-weight phrases in combination with a sliding window mechanism, generating unique semantic fingerprints by utilizing a Karp-Rabin hash function, improving the speed and accuracy of answer matching, and performing fuzzy control and redundant information elimination on candidate answers by adopting a rough set tolerance model. Semantic similarity judgment is carried out according to the intersection and union set proportion between the upper and lower approximate sets, the problems of semantic drift and repeated candidates in traditional matching are effectively relieved, and through reinforcement learning and A / B testing, the question and answer strategy is continuously optimized, and the response effect of the system and the user satisfaction degree are enhanced.

The invention relates to the technical field of supply chain management, in particular to a block chain-based culture product tracing method and system, and the method comprises the following steps: collecting the type, producing area and growth cycle data of culture products, distributing an identifier for each data item, coding the data and the associated identifiers in an upload format, and storing the data and the associated identifiers in a database; and uploading the data to a block chain network through an encryption channel, and generating a coded data record. According to the method, the timestamps and the data records are bound, each record is processed by using the hash function, and the security of each supply chain node is verified, so that not only is the integrity of data processing improved, but also an effective verification means is provided for consumers, and the security of the consumers is improved by decrypting and verifying the encrypted data. The security and privacy protection of data in storage and transmission are ensured, the production and circulation process of products is tracked through a block chain query function, the food security is improved, the supervision compliance is enhanced, and a powerful tool is provided for solving fraud and pollution problems in a supply chain.

A non-transitory, processor-readable medium storing instructions that when executed by a processor, cause the processor to receive data artifacts, encode the artifacts to a standard data type, and compute, for each artifact, a hash function. The hash functions and encoded documents are stored in a first database. The processor is caused to tokenize the encoded artifacts, to produce tokens associated with natural-language identifiers extracted from the encoded artifacts. The processor is caused to transform, using an embedding model, the tokens to produce vectors that are stored in a second database and classified based on categories. The second database is configured to be queried to perform a semantic search in response to receiving a request from a user operating a user compute device. The processor is caused to retrieve, from the semantic search, a subset of vectors from the second database to be displayed on the user compute device.

The invention relates to the technical field of data processing and privacy protection, in particular to a data desensitization and integrity verification method and system based on a differential privacy algorithm, and aims to realize collaborative optimization of data privacy protection and integrity guarantee. Determining a total privacy budget by calculating global sensitivity, a data leakage risk coefficient and independent and joint data privacy information amount, dynamically allocating the privacy budget for a single-task or multi-task scene, and injecting noise based on an allocation result to realize differential privacy desensitization; meanwhile, a verification voucher is generated by using a hash function, a digital signature and an alliance chain, and the data integrity is ensured through signature verification, data consistency verification and block chain verification. The system comprises a data application processing module, a global sensitivity calculation module, a desensitization core processing module, a verification voucher generation module and an integrity verification module, is suitable for government affairs, enterprises and other scenes with high requirements for data privacy and integrity, and effectively improves the safety and reliability of data processing.

The invention relates to the technical field of Internet of Things security, and provides a security authentication method and system for an Internet of Things device, a medium and a device, and the method comprises the steps: responding to an authentication request of the Internet of Things device, the authentication request comprising a unique identifier, a current timestamp and a comprehensive feature vector of the Internet of Things device; after the current timestamp and the comprehensive feature vector are connected, generating a random challenge value through a random function and sending the random challenge value to obtain a returned Internet of Things equipment response value; after the authentication key, the comprehensive feature vector and the random challenge value are connected, an expected response value is generated through a secure hash function, and whether the Internet of Things equipment is successfully authenticated or not is judged through comparison; and if the authentication is successful, generating a session key, connecting the authentication key with the session key, and updating the authentication key through a secure hash function. The common security threats such as replay attack and man-in-the-middle attack are effectively prevented, and the uniqueness and security of each authentication are ensured.

A wireless peripheral device operatively coupled to a wireless dongle of an information handling system includes a microcontroller to receive a polling packet from the operatively coupled wireless dongle, via a wireless peripheral device radio, identifying a selected number of encrypted data packets for a data packet frame. The microcontroller executes code instructions of a wireless input / output protocol authenticated encryption agent with bi-lateral linear-feedback shift register (LFSR) input stream to generate an initial key or a later dynamic key. With the initial key or dynamic key, the encryption system uses a shifting state machine output from each of a first and second LFSR in an encryption algorithm to generate a data packet encryption output value. The data packet is encrypted via an XOR operator with the data packet encryption output value, and each generated data packet encryption output value is subsequently the dynamic key for encryption of subsequent data packets.

The invention discloses a cross-border e-commerce anti-counterfeiting tracing method and system based on a block chain, and belongs to the technical field of computer application. The method comprises the steps of obtaining full-link information of commodity production, storage, logistics and sales links, performing encryption processing through a composite hash function, storing the information to a block chain by using an improved consensus mechanism, constructing an intelligent contract to realize automatic processing of commodity state changes, and scanning a code by a consumer to compare a hash value to verify authenticity. The system comprises an information acquisition module, a hash encryption module, a consensus storage module, an intelligent contract module and a verification module. According to the scheme, it is guaranteed that data cannot be tampered through the composite hash function, the consensus efficiency is improved through the hierarchical verification structure and the dynamic node weight, state monitoring and automatic claim settlement are achieved with the help of the intelligent contract, the problems of data fragmentation, difficult anti-counterfeiting, poor supervision cooperation and the like in cross-border e-commerce are solved, full-link credible evidence storage and automatic supervision are achieved, and the safety of cross-border e-commerce is improved. And the cross-border commodity anti-counterfeiting and traceability efficiency is improved.

A process includes receiving credentials associated with a request to access a computer platform. The credentials include a password and a user identification. The process includes determining a key handle and a reference cryptographic digest corresponding to the user identification. The process includes determining a second cryptographic digest corresponding to the user identification. Determining the second cryptographic digest includes providing the key handle and the password to a security processor of the computer platform and initiating an operation by the security processor to apply a keyed-hashing function to the password based on a cryptographic key corresponding to the key handle to provide the second cryptographic digest. The security processor stores the cryptographic key. The process includes regulating access to the computer platform based on a comparison of the second cryptographic digest to the reference cryptographic digest.

The invention provides a homomorphic keyword privacy information retrieval method and system based on polynomial linking.The homomorphic keyword privacy information retrieval method and system based on polynomial linking.The homomorphic keyword privacy information retrieval method comprises the steps that data items in a database are segmented; the method comprises the following steps: processing keywords in a database by using cuckoo Hash, and publishing a used Hash function; creating a zero-value polynomial by using the processed elements in the table, and creating an interpolation polynomial on the segmented data items by using a polynomial linking technology and taking a hash value as a root; respectively calculating hash values of keywords expected to be queried by utilizing the published hash function; the method comprises the following steps: encrypting a hash value of a keyword expected to be queried by using a fully homomorphic encryption technology, and respectively calculating a value of each polynomial; and decrypting the value of the first zero-value polynomial, if 0 exists, indicating that the keyword is matched with the query, decrypting the value of the interpolation polynomial, and outputting a result obtained by the query. According to the method, the practicability of private information retrieval is expanded.

A computer system is provided and is programmed to: (1) receive a document; (2) execute a hash function to generate a hash of the document; (3) compare the hash of the document to the plurality of hashes for the plurality of documents; (4) determine if an exact match exists between the hash of the document and the plurality of hashes for the plurality of documents; (5) if an exact match exists, indicate that the received document is a duplicate; and (6) if no exact match exists, the at least one processor is programmed to: (a) perform similarity analysis on the document to compare the document to the plurality of stored documents; (b) determine a similarity measure for the document based on the comparison; (c) compare the similarity measure for the document to a threshold; and (d) indicate that the received document is a potential duplicate based upon the comparison.

The invention provides a multi-party collaborative anti-quantum signature method and system based on homomorphic Hash, and relates to the technical field of digital signatures, the system comprises a plurality of participants and a verification party, and the method is specifically as follows: each participant generates a pair of public and private keys, the public key is composed of a total public key, a total signature matrix and a total Hash matrix of all participants; based on the public and private keys, all participants perform multi-party signature on the target message through a homomorphic hash function, and a generated signature is composed of total hash challenge values of all participants, total response vectors of all participants and commitment value high-order difference values of all participants; according to the signature, the verifier recovers the high order of the total commitment value, further calculates the total hash challenge value, and verifies the validity of the signature through comparison of the total hash challenge value; according to the method, multi-user collaborative signature is realized, and the security of resisting malicious opponents under a quantum computer is obtained.

The invention discloses an RFID electronic tag anti-collision processing system, which relates to the technical field of radio frequency identification and comprises an encryption module, a signal processing module and a real-time processing module. The encryption module is used for realizing label identity verification based on a hash function; the signal processing module adopts a mixed anti-collision mechanism combining a time slot ALOHA protocol and a binary tree search algorithm; the real-time processing module comprises a multi-channel parallel processing unit, and each channel is configured with an independent local frequency. According to the RFID electronic tag anti-collision system, the encryption module, the signal processing module and the real-time processing module are combined, the problem of multi-tag collision of the RFID technology in a high-density and dynamic application scene is effectively solved, the encryption module adopts a hash function and an elliptic curve encryption algorithm, safe and efficient verification of tag identities is achieved, and the security and reliability of the RFID electronic tag are improved. The innovative hybrid anti-collision mechanism of the signal processing module is the combination of a slot ALOHA protocol and a binary tree search algorithm.

The invention relates to the technical field of logistics information tampering prevention, in particular to a logistics information tampering prevention system based on a block chain, and the system comprises a logistics information initial encryption module which is used for collecting key logistics information items, calling a chameleon hash function to carry out the hash operation of the collected key logistics information items, obtaining a logistics information chameleon hash sequence, and sending the logistics information chameleon hash sequence to a logistics information tampering prevention module; and a warehouse administrator or a carrier driver uses a private key to digitally sign the key logistics information item and the logistics information chameleon hash sequence to generate a signed logistics data packet. According to the method, key logistics information items are collected, and a chameleon hash function is adopted to perform hash operation on logistics information, so that the tamper-proof capability of the information in the transmission process is enhanced; meanwhile, a private key is used for carrying out digital signature to bind the identity of an operator, so that the identity traceability of an information source is realized, and the identity is effectively prevented from being counterfeited or falsely used.

The invention relates to the technical field of data security, can be applied to business scenes of financial science and technology, medical health and the like, and discloses an encryption processing method, device, equipment and medium based on chaos parameter adjusting.The encryption processing method comprises the steps that a composite chaos signal is generated based on a chaos module, and feedback information is dynamically extracted in combination with a hash function; an error vector is constructed, chaotic module parameters are adjusted, an updated composite chaotic signal is generated, a key stream is generated through quantization, the data block size is determined according to the amplitude of the error vector, block encryption target data is driven through the key stream, and dynamic cooperation of the key stream and the data encryption process is achieved. According to the method, a chaos module, a hash function and a dynamic adjustment mechanism are closely combined, real-time hash value feedback control over dynamic evolution of chaos parameters is achieved, error driving adjustment is introduced in the key stream generation process, the continuity and randomness of key stream entropy values are improved, and the key stream generation efficiency is improved. The problem of low efficiency of hash static application and encryption processing in the prior art is effectively solved.

The invention provides a lightweight encryption authentication method for a wireless sensor network, which comprises the following steps: a gateway node generates a sensing instantaneous key and a user instantaneous key respectively based on a one-way hash function and a preset physical unclonable function, the sensing instantaneous key, the user instantaneous key, a preset sensing long-term key and a user long-term key are respectively sent to the user side and the sensor node; after the user side and the sensor node are registered, the user side performs identity verification on identity information currently input by a user, and performs mutual authentication among the user side, the gateway node and the sensor node based on the identity information, so as to send a sensing hash message authentication code and a user hash message authentication code to the sensor node according to an authentication result; according to the method, the sensor node and the gateway node are subjected to key negotiation authentication to obtain the session key, so that wireless sensor network communication can be carried out based on the session key, and the security authentication problem of the wireless sensor network is effectively solved.

The invention relates to a cross-domain authentication method based on a block chain, and the method comprises the steps: obtaining distributed identity data, carrying out the coding through employing a preset hash function, and obtaining a coded identity; recording an identity verification log based on the encoded identity label, and retrieving label consistency data from an account book according to the verification request to obtain a legality verification result; obtaining a dynamic permission allocation strategy through a legality verification result, generating a temporary access credential meeting the access requirement, and determining the content of the dynamic credential; extracting a permission range based on the dynamic voucher content, encrypting the permission range by adopting a zero-knowledge proof protocol, acquiring proof data, distributing the proof data to a cross-domain access target domain, and if the target domain feeds back a verification request, checking credibility according to the proof data, and obtaining an access permission validity result, extracting an access demand matching degree for comparison verification, and determining a cross-domain access passing state. According to the method, the trusted identity management requirement in a complex heterogeneous network environment can be met.

A method for provisioning a device-bound, replay-protected software image may include obtaining, from a provisioning system, a software image and a digital signature associated with the software image. The method may include applying a hash function to the software image and a hash message authentication code (HMAC) to generate a hash of the software image. The HMAC may include an authentication code derived from first data provided by a root of trust (RoT). The first data may include a nonce generated by the RoT or system information associated with the RoT. The method may include verifying, using a public key of the provisioning system, the digital signature. The method may include, responsive to the verification of the digital signature, causing the software image to execute.

The invention discloses a network flow measurement method and device based on a data packet interval sketch data structure and a medium. Each arriving data packet is mapped to each corresponding bucket in a sketch data structure through a plurality of independent hash functions, the sketch data structure is a two-dimensional array form structure comprising multi-row and multi-column buckets, and empty bucket processing, identical flow updating or conflict flow replacement judgment is executed according to the conditions of the data packets and the buckets. According to the method, a brand-new interval value sketch is designed, and efficient and accurate large flow detection is realized on the premise of high processing speed and low memory occupation by comprehensively utilizing two pieces of multi-dimensional statistical information of the flow estimation value and the data packet interval. Meanwhile, the large flow and the small flow in the network environment can be well distinguished, so that the method can be better suitable for network measurement tasks in different scenes such as large flow detection and abrupt flow detection.

The embodiments of the present application relate to the technical field of computers. Provided are a data processing method and apparatus, and an electronic device and a computer-readable storage medium. The method comprises: using a first hash function and a second hash function to encode, into a first hash value and a second hash value, each key in key value data to be stored; traversing first hash values and second hash values of all keys in said key value data, and determining parameter information of a perfect hash corresponding to said key value data, wherein the parameter information of the perfect hash comprises: an index of a slot corresponding to each key; and storing said key value data according to the index of the slot corresponding to each key. The solutions of the embodiments of the present application solve the problems of IO overheads of disks being high and the query efficiency being low during data query.

The invention discloses an anti-quantum-attack key generation method and device, equipment and a medium, which are used for improving the key generation efficiency and further improving the digital signature efficiency. The method provided by the invention comprises the following steps: determining a one-time signature type value; and respectively determining a first parameter and a second parameter used for generating a private key, generating a random number of a preset byte number, and taking the random number as a secret seed, further generating a plurality of first messages based on the one-time signature type value, a first parameter, a second parameter and a secret seed; grouping the plurality of first messages according to parameters used for representing the parallel processing capability of a preset hash function; for the first messages in each group, determining hash values corresponding to the first messages in the group in parallel by adopting the preset hash function; then, utilizing a hash value corresponding to each first message to obtain a first secret original image array; and generating a private key by using the first secret original image array.

The invention relates to the field of data encryption, and particularly discloses an encryption method and system compatible with multiple encryption algorithms, and the method comprises the steps: a, receiving to-be-encrypted data inputted by an enterprise user and encryption parameters specified by the user through a user interface; b, dynamically selecting a proper encryption algorithm by using an encryption management module according to the sensitivity, access requirements and data characteristics of enterprise data; c, converting the to-be-encrypted data into an applicable format of the selected encryption algorithm by using an algorithm adapter; by dynamically selecting and combining a plurality of encryption algorithms, the system can provide higher-level protection according to the sensitivity of data and the security requirement of an enterprise; the algorithm adapter and the encryption management module allow the system to flexibly adapt to different data characteristics and security parameters, so that the compatibility with various encryption algorithms is ensured; meanwhile, the system adopts the Hash function and message authentication code technology, the system can verify the integrity of the data in the transmission and storage process, and unauthorized tampering is prevented.

The invention relates to the technical field of cable fault monitoring, in particular to an early warning system based on cable fault data analysis, which comprises a quantum encryption unit, a data acquisition and transmission unit and a fault analysis early warning unit, the quantum encryption unit uses a quantum bit entanglement enhancement mechanism to design a quantum gate operation sequence to regulate and control quantum bit pairs, adaptive noise resistance quantum coding is implemented, a coding mode is adjusted according to noise, verification and error correction are carried out, and data encryption is ensured to be safe and reliable; a multi-source data hierarchical encryption architecture is encrypted in different modes and then transmitted to a fault analysis and early warning unit, the unit receives data, decrypts and verifies the data, ensures data integrity by using a quantum hash function identifier, judges cable fault risks through a preset neural network model and a threshold value, and gives out early warning in time; the problems of safe transmission and accurate analysis of cable fault data are effectively solved, and the cable operation and maintenance safety and reliability of a power system are improved.

The invention provides an efficient privacy set intersection method and device based on bucket coding, and the method comprises the steps: obtaining an input set and a target value set, the input set comprises a private set of a sender and a private set of a receiver, and the target value set is generated based on the private set of the receiver; encoding the private set of the receiver into a sparse matrix composed of a plurality of buckets through a hash function; determining a linear system of the sparse matrix; performing ascending sorting and re-labeling on the linear system according to the initial bit position set to obtain a target linear system; according to a bucket-based Gaussian elimination algorithm, based on a target linear system, through exclusive-or operation, determining oblivious key value pairs for storage; an intersection of the private set of the sender and the private set of the receiver is determined based on the oblivious key-value pair storage according to an oblivious linear evaluation protocol. According to the invention, communication resources required by privacy set intersection in an actual production environment can be further reduced.

The invention provides a method and a system for ensuring credibility and security of a network space. The method comprises the following steps of: S1, realizing multi-identifier addressing of embedded identity authentication and packet signature based on a multi-identifier network; s2, defining a digital customs, a digital passport and a digital visa based on the multi-identification network; s3, performing calculation based on the time data, the digital visa key and the hash function to obtain a digital visa based on the multi-identification network; s4, according to the hash value of the digital visa and the transnational passport key, calculating to obtain a digital passport based on the multi-identification network; s5, realizing a digital customs through a multi-identifier network router, and using and maintaining an exit table through the digital customs; and S6, verifying the digital passport by using an entry table through the digital customs, and updating the entry table. According to the method, the credibility and the security of the network space can be effectively guaranteed, the blockchain log support is traceable, and a better foundation is provided for guaranteeing the orderliness, the handling and the peaceability of the network space.

Methods, systems, and apparatus for generating a cryptographic hash digest. In one aspect, a method includes obtaining data representing a quantum circuit. An initial quantum state vector is generated, where the initial quantum state vector includes an input quantum state vector for the quantum circuit. The initial quantum state vector is used to generate one or more evolved quantum state vectors, where each evolved quantum state vector is generated by applying a respective portion of the quantum circuit to the initial quantum state vector. Logical operations are iteratively applied to floating point binary representations of the initial and evolved quantum state vectors to obtain a binary string, and a hash function is applied to the binary string to obtain a cryptographic hash digest of the quantum circuit.

The invention provides a three-dimensional model rights protection and traceability method, which includes: collecting data information; using the sha256 hash algorithm to calculate the unique identifier of the computer that purchased the three-dimensional model rights product according to the data information; using the deep neural network invisible watermark technology to make a deep neural network model with the node unique identifier implanted, using the implanted neural network model to process the three-dimensional model rights product to obtain an encrypted file; using the sha256 hash function to calculate and process according to the encrypted file and the unique identifier; encrypting the three-dimensional model rights product again; packaging the product unique identifier and the node unique identifier of the second encrypted three-dimensional model file and submitting them to the smart contract of the alliance chain to obtain the three-dimensional model file authentication information. By exporting the stolen three-dimensional model file circulation process information, the details of the stolen three-dimensional model file can be analyzed.

The embodiment of the invention provides a key protection method and device based on a PUF chip and a storage medium, and the method comprises the steps: in a key generation stage, generating a random challenge sequence based on physical environment parameters, and transmitting the challenge sequence to the PUF chip; the PUF chip generates a corresponding PUF response according to the received challenge sequence, and the PUF response is processed by a hash function to generate an initial key material; and in combination with the initial secret key material and the message information of the equipment, secret keys with different requirements are derived, so that the flexibility and the security of secret key generation are improved, multi-purpose secret keys are derived as required, the relevance between the secret keys is reduced, and the anti-attack defense capability is improved.

The invention discloses a distributed file system metadata index optimization method based on remote direct memory access, which comprises directory metadata index based on path name hash: defining a plurality of layers of directories in a directory tree as key directories, and regarding the path as a character string. After calculation of the hash function, determining the storage position of the data in the memory of the metadata server of the distributed file system; and optimizing the memory position of the file metadata based on the popularity, namely placing the file metadata which is frequently accessed at a position adjacent to the key directory metadata to which the file metadata belongs. A metadata management module in a metadata server of the distributed file system regularly checks the popularity of the file and carries out cold and hot migration according to the situation; and client cache optimization oriented to key directory metadata: a metadata cache of a distributed file system client caches the metadata and directory entries of the key directory. Optimally assuming that the metadata and directory entries of the key directory in the cache are not invalid, and updating the cache according to the result of the next-level metadata search. According to the method, the remote reading performance of the metadata index of the distributed file system is optimized by fully utilizing the characteristic of remote direct memory access, the network transmission frequency is reduced, and the load of the metadata server is effectively reduced.

The present invention discloses a ring signcryption generation method, system and device based on the SM9 digital signature algorithm. The present invention utilizes the bilinearity, non-degeneracy and computability characteristics of bilinear mapping, and adopts the SM9 digital signature algorithm and a hash function to construct a ring signcryption scheme. By optimizing the SM9 digital signature algorithm, the present invention has lower computational overhead and communication overhead, is particularly suitable for communication environments with limited energy and bandwidth, and fills the gap of the SM9 digital signature algorithm in ring signcryption schemes.