14 results about "Secure coding" patented technology

The invention discloses a foundation pit support deformation real-time monitoring method based on edge calculation, and aims to solve the problems of multi-node time synchronization and clock drift compensation caused by unavailability or poor quality of satellite navigation and precise time protocols in an underground or shielded environment. According to the method, through event dictionary learning, partition time slot scheduling and safety coding micro excitation time synchronization, matched filtering decoding, multi-scale arrival time estimation, paired time difference robust fusion, frequency priority and phase speed limit correction and network disconnection time holding, the time synchronization efficiency is improved; the technical effects that multi-source data alignment, deformation field reconstruction and graded early warning are completed on the unified virtual reference time scale, and high-precision synchronization and online drift compensation are obtained without depending on the external time service condition are achieved.

The invention relates to the technical field of federated learning, and discloses an internet cross-platform data security sharing method and system based on federated learning, and the system comprises a cross-platform client module, a coordination service network, a distributed key management cluster and a block chain evidence storage and excitation platform. According to the internet cross-platform data security sharing method and system based on federated learning, the difference of underlying platforms is shielded through a data interface and a feature alignment engine, and an end-to-end privacy protection chain is constructed through multi-layer protection of'differential privacy + homomorphic encryption + security communication '; dynamic privacy budget and resource management enable the client to flexibly cope with different scenes, and meanwhile, through early-stage feature alignment and secure coding, the threshold of heterogeneous data participating in federated learning is reduced, so that internet cross-platform data can be safely shared.

The embodiment of the present disclosure discloses a network space asset fingerprint identification method and system. The method comprises the following steps: forming original fingerprint fragments according to four types of metadata of captured network traffic record time sequence, protocol, payload length and direction; extracting equipment communication feature vectors from the original fingerprint fragments; performing dimension reduction processing on the feature vectors to obtain micro-signatures with fixed length; performing unsupervised dynamic clustering on the micro-signatures as input to establish equipment type identification; grouping the micro-signatures according to the equipment type identification, arranging the micro-signatures in time sequence, and splicing the micro-signatures into behavior chains; encrypting the equipment identification and the equipment type identification to generate anonymized equipment ID, securely encoding the micro-signatures, abstracting the behavior chains, and constructing a three-tuple data structure containing equipment ID, secure micro-signature and behavior abstract. The method can solve the technical problems of relying on a large number of pre-labeled training samples, being difficult to identify unknown equipment types, and lacking a secure output mechanism.

A systematic security protection method for a multimodal AI model is provided. The method comprises: in a security detection stage of the target multimodal AI model, according to a perceptual distance between detection data and original data determined by a trained distance-aware judgment model, obtaining detection data whose perceptual distance from the original data meets a requirement, and detecting the target multimodal AI model by using the detection data; in a case that the detection result in the detection stage is that the target multimodal AI model has a security problem, on one hand, performing security coding protection and tokenization filtering on the input of the model, on the other hand, performing multi-dimensional omnidirectional evaluation on the multimodal AI model.

The invention relates to a method and system for controlling priority vehicle traffic flow using secure coded signals. By establishing a mechanism for issuing digital identifiers (EC) and a set of anonymous certificates (Certx) that decay over time Ti = T0 . e - ƛi, with ƛ>0 independent along with the establishment of a shared session key between the vehicle and the intelligent system (V2X), allows vehicles to participate, requiring priority traffic flow management while ensuring security, preventing tracking, and eliminating fraudulent vehicles. The process and system for controlling priority vehicle traffic flow using secure coded signals as described in the invention also reduces computational costs and saves system resources, which is beneficial for transportation systems.

The invention provides a satellite-ground network OFDM (Orthogonal Frequency Division Multiplexing) anti-interception waveform design method based on security coding, and relates to the technical field of communication. The method comprises the following steps: determining a first signal to interference plus noise ratio at a legal receiver and a second signal to interference plus noise ratio at an eavesdropper according to a source symbol transmitted on each subcarrier, a security coding matrix in a time domain, a power allocation scheme, a frequency domain channel matrix and a frequency domain noise vector; according to the first signal to interference plus noise ratio and the second signal to interference plus noise ratio, a target optimization problem is established, and the target optimization problem takes the signal quality of the legal receiver end as an optimization target; and solving the target optimization problem by using a binary search algorithm and a neural network to obtain a final security coding matrix and a final power allocation scheme, and designing a satellite-ground network OFDM anti-interception waveform based on security coding by using the final security coding matrix and the final power allocation scheme. Therefore, the secrecy performance of the satellite-to-ground link is relatively high, and the computing power resource occupation of the satellite-to-ground fusion network is reduced.

The embodiment of the invention discloses a cyberspace asset fingerprint identification method and system. The method comprises the following steps of: forming an original fingerprint fragment according to four types of metadata including a time sequence, a protocol, a load length and a direction of captured network traffic record; extracting a device communication feature vector from the original fingerprint fragment; carrying out dimension reduction processing on the feature vector to obtain a micro signature with a fixed length; performing unsupervised dynamic clustering by taking the micro signatures as input, and establishing equipment type identifiers; grouping the micro-signatures according to the equipment type identifiers, arranging the micro-signatures according to a time sequence, and splicing the micro-signatures into a behavior chain; and encrypting the device identifier and the device type identifier to generate an anonymized device ID, performing security coding on the micro signature, performing abstract processing on the behavior chain, and constructing a triple data structure containing the device ID, the security micro signature and the behavior abstract. The method can solve the technical problems that a large number of pre-marked training samples are relied on, unknown equipment types are difficult to identify, and a safe output mechanism is lacked.

The invention relates to the technical field of quantum security calculation, and discloses a multi-party multi-data summation method based on a d-dimensional cluster state, which introduces a semi-honest third party to assist in completing summation calculation, and constructs a bidirectional identity authentication process between a participant and the third party by using a dual one-way hash function, thereby effectively preventing identity impersonation attack. In a multi-party multi-data summation stage, a multi-party quantum information interaction structure is established by using quantum entanglement association between a d-dimensional Bell state and a d-dimensional cluster state, and secure coding and aggregation of private data of participants are realized through Bell measurement. Meanwhile, detection particles from (d + 1) groups of complementary bases are randomly inserted into a quantum channel and are used for detecting potential eavesdropping behaviors and ensuring the safety of a quantum communication process.

A systematic security protection method for a multimodal AI model is provided. The method comprises: in a security detection stage of the target multimodal AI model, according to a perceptual distance between detection data and original data determined by a trained distance-aware judgment model, obtaining detection data whose perceptual distance from the original data meets a requirement, and detecting the target multimodal AI model by using the detection data; in a case that the detection result in the detection stage is that the target multimodal AI model has a security problem, on one hand, performing security coding protection and tokenization filtering on the input of the model, on the other hand, performing multi-dimensional omnidirectional evaluation on the multimodal AI model.

The invention belongs to the technical field of instruments, and particularly discloses a method, a system, a terminal and a medium for automatically setting a safety code for an instrument, and the method comprises the steps: presetting safety code storage position identification information of an engine controller corresponding to a vehicle model matched with the instrument into the instrument; after the instrument is powered on for the first time, detecting whether a security code is stored in a local memory or not, and if not, sending a security code setting request message to an engine controller through a CAN bus to request to obtain the security code; after receiving the request message, the engine controller extracts or generates a security code bound with the engine controller, encapsulates the security code in a response message and sends the response message to the instrument; the instrument analyzes the response message and stores the security code; and in the subsequent power-on process of the instrument, safety code setting verification is carried out by using the stored safety codes and the engine controller. The method can be applied to an instrument control system, and has the characteristics of high structural universality, high security coding efficiency, good communication protocol compatibility and the like.

The invention relates to a multi-channel hybrid coding transmission system, method, module and terminal based on an FPGA. The system comprises a multi-interface receiving module, a receiving interface data preprocessing module, a multi-interface sending module, a sending interface data preprocessing module, a security coding unit, a fault-tolerant unit and a system control unit which are arranged in the FPGA. After data is sent out from an upper computer and received by an interface in the FPGA, receiving clock domain crossing processing and encoding pre-processing are carried out on the data, data security encoding processing is carried out after completion, the processed data are sent to encoding post-processing, sending clock domain crossing processing is carried out after completion, and finally the data are sent back to the upper computer from an interface module. Compared with the prior art, the system, the method, the module and the terminal have the advantages of flexibility enhancement, expansibility breakthrough, instantaneity improvement, security optimization and fault tolerance rate improvement, and can well solve the technical defects in the prior art.

The application relates to the technical field of quantum security calculation, and discloses a multi-party multi-data summation method based on d-dimensional cluster states, a semi-honest third party is introduced to assist in completing summation calculation, and a two-way identity authentication process between participants and the third party is constructed by using a double one-way hash function, so that identity impersonation attacks are effectively prevented. In the multi-party multi-data summation stage, a multi-party quantum information interaction structure is established by using quantum entanglement correlation between d-dimensional Bell states and d-dimensional cluster states, and Bell measurement is used to realize safe coding and aggregation of private data of the participants. Meanwhile, detection particles from d+1 groups of complementary bases are randomly inserted in a quantum channel, which are used for detecting potential eavesdropping behaviors and ensuring the safety of the quantum communication process.

The invention relates to a data coding method and system, a terminal and a storage medium. The method comprises the following steps: constructing a safe character set and a matched inverse mapping table; the method comprises the following steps: acquiring an original data packet, converting the original data packet into a plurality of groups of coded value sets according to a numerical value mapping mechanism, carrying out legality verification on the coded values in sequence according to an inverse mapping table, carrying out association mapping on each coded value passing verification and a safe character set to respectively obtain coded characters, and storing the coded characters in a database; collecting and generating a plurality of coded character strings; and collecting all the coded character strings, and generating a character text which corresponds to the original data packet and is matched with the target transmission protocol. According to the scheme provided by the invention, the security coding character set which does not contain null characters and transmission sensitive characters is constructed, and a specific mapping mechanism is combined, so that high-density and high-security coding operation on the original data is realized, and the data transmission efficiency is improved to the maximum extent.

This invention discloses a rail transit control device and its usage method. The device includes: a first processing channel, used to generate its own allowed restart count security code based on its allowed restart count, and to generate a first drive signal after the allowed restart count security code passes verification; it is also used to generate first safety data; a second processing channel, used to generate its own allowed restart count security code based on its allowed restart count, and to generate a second drive signal after the allowed restart count security code passes verification; it is also used to generate second safety data; and a communication module connected to the first and second processing channels. The communication module operates after receiving the first and second drive signals, enabling the first processing channel to interact with external devices to exchange the first safety data and enabling the second processing channel to interact with external devices to exchange the second safety data. This invention uses security encoding for the allowed restart count to ensure the security of the allowed restart count.