96 results about "SM4 Algorithm" patented technology

The invention discloses an intelligent system and method for fusing mental health evaluation in an interest scene based on an education robot. The system realizes non-intrusive mental health assessment by constructing a technical architecture of'multi-modal biological feature anonymization-quantum hybrid encryption-federated learning privacy protection-dynamic risk assessment '. The method is characterized by comprising the following steps of: (1) generating irreversible biological characteristic codes by adopting a chaos random number generator, and realizing anonymized association by combining a double hash chain technology; (2) designing a quantum enhanced hybrid encryption system, fusing an SM4 algorithm, NTRU post quantum cryptography and quantum key distribution; (3) developing a dynamic scene generator, and naturally fusing psychological test questions into interest topics by using a generative adversarial network (GAN) and a curiosity engine; (4) constructing a multi-modal emotion analysis system, and combining an LSTM + CNN hybrid model to realize physiology-behavior-voice data fusion analysis; and (5) deploying a federated learning framework, and protecting model training data through differential privacy noise injection (epsilon = 0.5).

The invention discloses an intelligent abnormity early warning system for an industrial Internet of Things edge node, which comprises an edge sensing layer, an edge intelligent layer and a cloud edge collaboration layer, and is characterized in that the edge sensing layer is used for data acquisition and security preprocessing; the edge intelligent layer is used for intelligently analyzing the data transmitted by the edge sensing layer and constructing a dynamic space-time diagram neural network model and a dynamic edge knowledge graph; a digital twinning threshold engine is set, when the digital twinning threshold engine detects abnormity, reverse reasoning is carried out along the knowledge graph, and self-adaptive early warning is carried out; and the cloud edge collaboration layer is used for carrying out collaboration processing on early warning triggered by the digital twin threshold engine. According to the invention, the spatial-temporal features of the equipment group are learned through the set dynamic spatial-temporal diagram neural network; the digital twin threshold engine generates a dynamic threshold based on physical simulation and adapts to environment and load changes; the edge layer realizes lightweight real-time analysis; and a full-link embedded chaotic encryption and national cipher SM4 algorithm is adopted.

The invention discloses a digital archive multi-protection-based data security transmission method, and relates to the field of data security transmission, and the method comprises the steps: generating a random seed in real time based on a quantum state, carrying out the iterative blocking of the quantum seed through combining with Logistic chaotic mapping, outputting variable-length secret key fragmentation, carrying out the symmetric encryption of archive data through employing a lightweight SM4 algorithm, and carrying out the encryption of the archive data. Obtaining encrypted data of the fragments; a behavior anomaly probability is calculated through a hidden Markov model, a risk score is calculated through a safety interval, and when a score value exceeds a safety threshold value, a grading response is triggered; key fragments are generated by adopting n nodes, at least k fragments can reconstruct signatures to monitor the node state of the block chain, and when the node anomaly rate exceeds a node threshold value, a three-layer architecture is automatically switched. The method has the advantages that an active multi-protection system is constructed through a quantum dynamic key, risk-driven hierarchical response and block chain disaster recovery switching, and quantum attack resistance and dynamic adaptation to transmission of network risks are realized.

The invention relates to the technical field of information security, and discloses a handwriting dynamic encryption and electronic signature method based on a national secret algorithm, and the method comprises the steps: obtaining the handwriting data of a user, and carrying out the preprocessing of the data to remove noise and errors; carrying out feature extraction on the preprocessed handwriting data, extracting corresponding track features, speed features and pressure features, and generating a feature hash value of a unique identifier through a cryptographic SM3 hash algorithm; splicing and combining the feature hash value and a user private key, deriving a dynamic key through a national secret SM2 algorithm, and generating an electronic signature by using the dynamic key; an electronic signature is combined with a timestamp to form a structured signature packet, and the signature packet is hierarchically encrypted and stored in a database through a national cryptographic SM4 algorithm. According to the method and the system, the handwritten signature picture, the digital signature technology, the electronic signature technology and the biological recognition and layout file processing technology are fused, so that the safety and the reliability of electronic document signing are improved.

According to the safety coprocessor hybrid encryption method based on the SM2 / 3 / 4 domestic cryptographic algorithm, a novel hybrid encryption system based on the SM2 / 3 / 4 and considering encryption safety, efficiency and key management convenience is constructed on the basis of the characteristics of the SM2 algorithm, the SM3 algorithm and the SM4 algorithm, and the encryption / decryption and signature / verification process is achieved. And aiming at the efficiency problem of a domestic SM algorithm, an encryption / decryption and signature / verification scheme is designed and realized through pure software analysis and software and hardware (SW / HW) collaboration, so that optimal division of software and hardware is realized, and the algorithm efficiency is greatly improved.

According to the clinical nursing patient information monitoring and inputting method and system, the data accuracy, the data inputting efficiency and the privacy protection safety are improved; the method comprises the following steps: firstly, collecting and preprocessing vital sign data of a patient in real time through various physiological sensors; then, acquiring a nursing record image, acquiring nursing record data through an OCR model, acquiring nursing information voice, transwriting the nursing record data and the nursing information voice into nursing information data through a medical scene voice transwriting model, and performing unified standardization processing on the three groups of data to generate patient information data; and finally, when patient information data is input, symmetric encryption is carried out by adopting a national cryptographic SM4 algorithm, encrypted data is obtained, a dynamic encryption key is generated through an ECDH key distribution technology, and the dynamic encryption key can be called to carry out decryption operation after authentication of a dual protection mechanism of Hash value pre-verification and identity authentication is passed.

The invention relates to the technical field of electric digital data processing security, and discloses a solid state disk data encryption method and a solid state disk. According to the method, a national cryptographic algorithm hardware encryption and decryption co-processing module is serially arranged on a data bus between a main control chip and a flash memory particle array, so that transparent encryption of write-in data and transparent decryption of read-out data are realized; the module performs encryption and decryption based on an SM4 algorithm and an XTS advanced encryption standard mode in combination with a logic address as an adjustment value, and securely injects a root key through an out-of-band interface to derive a data key. The system comprises a main control chip, a flash memory array and the co-processing module, wherein the co-processing module is integrated with a hardware encryption and decryption engine, a key management unit and data flow control logic. On the premise that a general main control chip is not changed, high-performance, high-compatibility and high-security national cryptographic hardware-level full-disk encryption is realized.

The invention discloses a data encryption and access control device for an intelligent fire-fighting internet of things system in the technical field of data protection. The data encryption and access control device comprises a dynamic encryption engine, a multi-mode access control module and a safety coprocessor. The dynamic encryption engine adaptively selects an SM4-GCM and SM9-Kyber hybrid encryption algorithm based on the data sensitivity level and the equipment type, so that the transmission encryption delay is less than or equal to 0.9 ms; the multi-mode access control module supports dynamic permission upgrading and tamper-proof evidence storage in a fire emergency scene through a three-layer architecture of RBAC + ABAC + block chain auditing; the security coprocessor adopts an FPGA hardware acceleration SM4 algorithm, and the energy efficiency ratio reaches 15Gbps / W. Anti-quantum security: the post-quantum algorithm Kyber-768 passes through the third round of authentication of NIST, and the key negotiation efficiency is improved by 3 times compared with that of the traditional ECDH (test data: the negotiation time consumption of 100,000 times is reduced from 18 seconds to 5.7 seconds). Technical optimization of the device comprises fine-grained access control innovation, a multi-modal strategy engine, block chain auditing and tracing, hardware acceleration efficiency optimization and distributed key management.

The invention discloses a national cryptographic algorithm acceleration system supporting SM4-ZUC dual-core dynamic collaboration, and belongs to the technical field of information security and hardware acceleration. The system comprises an AXI read-write module, a configuration register module, an SM4 algorithm module and a ZUC algorithm module. The configuration register receives and distributes information such as a secret key, an initial vector and a mode through an APB interface; the AXI read-write module supports burst transmission and dynamic scheduling data read-write; the SM4 algorithm module supports three modes of GCM, CTR and ECB; and the ZUC algorithm module is compatible with ZUC-128 / 256. And the corresponding ZUC-128 / 256 and SM4 algorithms can be dynamically selected for operation by judging an encryption mode in the ZUC and SM4 algorithms. The system adopts a three-level assembly line architecture, space-time multiplexing of read-write data and encryption is realized, and throughput rate is improved.

The invention relates to the field of Internet of Things security and intelligent access control, and particularly discloses a re-encryption near field communication method and a security door lock, and the method comprises the following steps: S1, in a near field communication establishment stage, carrying out equipment bidirectional authentication by adopting a national cipher SM4 algorithm, and generating a dynamic session key; s2, in a data transmission stage, dynamically switching an AES-256 or DES encryption algorithm based on the signal strength to ensure the communication security; s3, when abnormal operation is detected, triggering an SM3 hash algorithm to generate a security alarm fingerprint, and interrupting a current communication link; according to the invention, through dynamic combination encryption of a national cryptographic algorithm and AES / DES, a security protection system adaptive to a communication environment is constructed, and bidirectional authentication of equipment is realized by adopting an SM4 algorithm in a near field communication establishment stage, so that identity credibility is ensured; in the data transmission stage, the encryption strength is intelligently switched according to the real-time signal strength, so that the communication reliability in a weak signal environment is guaranteed, and the data confidentiality in a strong signal environment is enhanced.

The invention discloses a node communication adaptive encryption method and system for a high-availability cluster. The method comprises the following steps: a source node and a destination node perform SM2 key negotiation to generate a shared session key SK; the application layer of the source node sends a message to a high-availability trunking communication service; a high-availability trunking communication service firstly calls a hook function serving as a universal encryption signature interface on a message outbound path by using a communication protocol module, if a specified encryption mode is SM4 encryption, a message is encrypted by using a shared session key SK through an SM4 encryption module to generate an encrypted data packet, otherwise, other encryption modules are called to generate the encrypted data packet; sending the encrypted data packet to a destination node; and the destination node decrypts the generated plaintext data packet and sends the plaintext data packet According to the method, the SM4 algorithm is seamlessly integrated into a communication system of a high-availability cluster, and the performance overhead is controlled within an acceptable range while security encryption is provided through optimization.

The invention discloses a multi-receiver data asset verification transmission method and system based on a national cryptographic algorithm, and relates to the technical field of information security, and the method comprises the steps: a cloud carries out the value evaluation of original data assets, calculates a hash value through a national cryptographic SM3 algorithm, and generates a value voucher; calling a national cryptographic SM4 algorithm and a data encryption key to encrypt original data to obtain a data ciphertext, and encrypting the data encryption key by using a national cryptographic SM2 public key of each receiving edge node to obtain a corresponding key ciphertext; signing the value voucher by using the SM2 private key to generate a digital signature; the data ciphertext, the key ciphertext, the value voucher and the digital signature form a transmission data packet to be issued; and each receiving edge node executes multi-stage verification after receiving. The technical problems that in traditional data asset transmission, data are prone to being tampered and stripped, and the receiver is difficult to trust the value declared by the receiver are solved, and the technical effects of safe transmission, controllable value and efficient verification in multi-receiver data asset transmission are achieved.

The invention discloses an efficient authentication encryption method based on SM4. The method comprises the following steps of: 1) initializing and generating an initial vector IV with the length of 128 bits, a secret key K of a national secret SM4 algorithm, a random number N with the length of 128 bits and associated data AD; 2) setting the length l of state updating data in the sponge structure to be 128 bits; 3) designing permutation operation # imgabs0 # 4 based on SM4 rounds of functions, generating S = IVKN in an authentication stage, sequentially executing # imgabs1 # to divide the associated data AD into a plurality of 128-bit data blocks, and performing round transformation on S to obtain a latest state S of fused associated data information; encrypting the plaintext M based on the state S and the key K to obtain a ciphertext C and an authentication tag T; and 5) completing decryption verification in a decryption stage.

The invention discloses a software and host authorization method and system based on an intelligent password key, and belongs to the technical field of software security. The method comprises the following steps: a fingerprint information generation stage: calling a system interface to collect host hardware information, combining the host hardware information, generating first fingerprint information by using a Hash algorithm, encrypting the first fingerprint information by using an SM4 algorithm to obtain a fingerprint ciphertext, and storing the fingerprint ciphertext in a memory; in the intelligent password key verification stage, whether the Ukey is inserted or not is judged, the inserted Ukey is scanned, and a Ukey insertion event is monitored at the same time; and then verifying the legality of the Ukey, if the Ukey is legal, reading the state of the Ukey, and checking whether the Ukey is bound, if the Ukey is not bound, executing a Ukey binding process, and if the Ukey is bound, executing a Ukey authentication process. According to the method, through hardware-level binding, even if the software is copied to other equipment, due to the fact that hardware information stored in the UKey is not matched, the software cannot run, and piracy is thoroughly blocked; the hardware information encrypted and stored in the UKey cannot be extracted or counterfeited, so that the UKey is prevented from being illegally copied.

The invention discloses a video content protection method and device based on a multi-channel image feature security mark, and relates to the technical field of video content security management, and the method comprises the steps: obtaining an original video, and checking the original video; acquiring a video frame image of the audited video, and performing fusion, dimension reduction, compression and encryption processing on multichannel high-order features of the video frame image through a perceptual hash algorithm, an interpolation hash algorithm, a compression coding principle and a national cipher SM4 algorithm to generate a dynamic security mark; embedding the dynamic security mark into the video frame image to generate an approved video; and extracting the dynamic security mark of the currently played video, and checking the consistency between the feature information extracted from the dynamic security mark and the feature information of the played video to judge whether the video is compliant or not. The video content is protected, the security of the video is improved, the compliance check of the video content is realized, and the accuracy and efficiency of compliance judgment of the video content are improved.

The invention relates to an SM4 algorithm hardware security implementation method, system and equipment for industrial control, and the method comprises the steps: building a four-stage pipeline architecture, dividing SM4 into a plurality of processing stages, and carrying out the parallel scheduling of each processing stage through the four-stage pipeline architecture; superposing a random noise current in an operation stage of the four-stage pipeline architecture; performing time domain mask conversion on an intermediate value in the SM4 algorithm processing process by adopting a dynamically updated mask parameter; through the combination of the four-stage pipeline architecture, the random noise current injection and the time domain mask conversion, the encryption throughput is improved, and the side channel attack protection capability is enhanced, so that collaborative optimization of high throughput encryption and strong side channel attack protection of an SM4 algorithm on a domestic hardware platform is realized; and the purpose of providing autonomous and controllable security data protection capability for an industrial control system is achieved.

The application provides a video front-end device authentication method and system based on a national secret SM9 algorithm, which comprises the following steps: a front-end video device downloads an SM9 identification key; the front-end video device and a video encryption subsystem are authenticated bidirectionally based on an identification password algorithm; the front-end video device encrypts monitoring video data by using an SM4 algorithm, and transmits the encrypted monitoring video data to the video encryption subsystem; and the video encryption subsystem decrypts the encrypted monitoring video data and transmits the decrypted monitoring video data to a video user terminal. By using the national secret technology, the standardization degree can be effectively improved, and technical weaknesses can be reduced; the front-end video device and the video encryption subsystem are authenticated bidirectionally based on the SM9 algorithm, so that the authenticity of the access device is ensured, and the access of malicious devices and the illegal control of the front-end device are effectively prevented; the monitoring video data is encrypted based on the national secret algorithm and is transmitted in an encrypted mode, so that the risk of data leakage can be effectively avoided, and the problem of poor safety performance of the existing video monitoring system is solved.

The application discloses a kind of intelligent lock systems of cash internet of things management terminal, comprising: portable terminal, at least one digital lock and background system;The portable terminal includes: communication module, configured to interact logistics task data and verification instruction with background system in real time;Security processing chip, built-in national secret SM2 / SM4 algorithm encryption and decryption unit;Digital key interface, the passive lock cylinder of digital lock is connected by physical plug;Multi-modal acquisition module, integrated double-sided camera, fingerprint instrument, RFID reader and non-contact certificate reader;Positioning module, support Beidou / GPS dual-mode positioning and electronic fence function;Dynamic key generation unit, based on logistics task identifier, terminal real-time position coordinates and time stamp generates disposable dynamic key.The application can more comprehensively carry out cash internet of things management terminal security protection.

The present application relates to the field of data encryption technology, and specifically to an application layer data encryption method and system based on the SM4 algorithm and digest verification. The method comprises: obtaining text data to be encrypted in the application layer and dividing it into multiple plaintext blocks; calculating the information duplication, semantic relevance, information sensitivity, and adjustment coefficient of each plaintext block; adjusting the control parameters of the chaotic mapping algorithm to obtain the adjusted control parameters corresponding to each plaintext block, combining the chaotic mapping algorithm and the SM4 algorithm to encrypt each plaintext block to obtain ciphertext data, and verifying the integrity of the ciphertext data during the communication transmission process through digital digest technology. The present application breaks the static mode of the traditional SM4 algorithm that fixes the S-box and key by adjusting the control parameters of the chaotic mapping algorithm to dynamically generate S-boxes and round keys, thereby enhancing the anti-attack capability of the plaintext block, reducing the risk of the plaintext block being leaked, and improving the encryption effect of the application layer data.

The invention provides a secret key distribution method and system for end-to-end encryption based on national secret, and relates to the field of secret key distribution, and the method comprises the steps: generating a derived temporary secret key pair based on an SM4 algorithm, and transmitting the derived temporary secret key pair to a client; receiving identity ciphertext information sent by the client, decrypting the identity ciphertext information, generating a derived session key pair, encrypting a private key based on the derived temporary key pair to obtain session public key ciphertext information, and sending the session public key ciphertext information to the client; and receiving encryption request ciphertext information sent by the client, performing decryption to obtain an encryption request, generating a target content key, encrypting the private key of the derived session key to obtain target content key ciphertext information, and sending the target content key ciphertext information to the client. According to the application, the cryptographic algorithm is adopted to protect the secret key distribution process, so that the application under specific security requirements and compliance requirements is met; and the method can conform to most scenes of secure key distribution, solves the problem that the system cannot be used due to a single-point fault, and is more flexibly suitable for a large-scale distributed system.

The application discloses a kind of based on SM2 algorithm and SM4 algorithm's password processing method and system, belong to computer information security technical field, comprising: the enhanced task control block including service index number and data amount is constructed;Based on historical performance data calculation processing coefficient, utilize double threshold hysteresis comparator decision serial or parallel mode, avoid mode frequent switching;Parallel mode is through load balancing weight function for subtask allocation IP core;Hardware synchronization control unit maintains three index tables being processing, blocking and having been processed, realizes the automatic blocking and wake-up of associated job package, and with service index number as address accesses key and intermediate state;Adopt interrupt aggregation and double buffering batch processing result;Based on sliding window adaptive calibration double threshold and dynamically adjusting weight coefficient.The application effectively reduces interrupt overhead, eliminates scheduling ping-pong effect, realizes hardware level job synchronization, improves load balancing and image encryption structure fidelity.

This invention discloses a blockchain-based method for medical data privacy protection and authorized sharing, relating to the field of medical data technology. This invention achieves medical data privacy protection and compliant sharing through a four-step closed-loop process. The first step is data splitting and encryption: the original data from the target hospital is split into cell units according to the smallest clinical semantic unit, independently encrypted using the SM4 algorithm, and then differentiated enhancement processing is implemented according to sensitivity to build a strong privacy defense. The second step is storage and evidence preservation: the encrypted units are distributed and stored in fragments, and the fragment hash value, semantic tag, and storage index are uploaded to the shared chain for evidence preservation, simultaneously building a cross-chain gateway and protocol to break down sharing barriers. The third step is authorization and verification: a four-dimensional intelligent authorization model is built to verify requests and generate a temporary key bound to this authorization, achieving precise authorization. The fourth step is usage control: the user decrypts and reassembles the data in a TEE adapted to the cryptographic algorithm, with real-time monitoring of the entire operation and synchronization to both chains, ensuring end-to-end security, controllability, and traceability.

The application provides a key distribution method and system based on end-to-end encryption of national encryption, and relates to the field of key distribution, which comprises the following steps: generating a derived temporary key pair based on an SM4 algorithm and sending the derived temporary key pair to a client; receiving identity ciphertext information sent by the client, decrypting the identity ciphertext information, and generating a derived session key pair; encrypting a session public key ciphertext information based on a private key of the derived temporary key pair and sending the session public key ciphertext information to the client; receiving encrypted request ciphertext information sent by the client and decrypting the encrypted request ciphertext information to obtain an encryption request; generating a target content key and encrypting the target content key through a private key of the derived session key pair to obtain target content key ciphertext information and send the target content key ciphertext information to the client. The application protects the process of distributing the key by using the national encryption algorithm, meets the application under specific security requirements and compliance requirements, can meet most of the scenes of securely distributing the key, solves the problem that a single point failure causes the system to be unable to be used, and is more flexible and suitable for large-scale distributed systems.

The invention provides a data management and control method and system based on mine safety production-oriented identification analysis middleware, and relates to the technical field of data management and control. Mine safety production identification analysis middleware is constructed, and underground multi-type terminal original identification data is received to obtain a to-be-processed packet; then coding and error correction are carried out on the to-be-processed packet to obtain a tundish; analyzing the tundish through a lightweight deep learning model, packaging the tundish into a standardized data object, and checking security information by using a national cryptographic SM4 algorithm in combination with an encrypted dynamic mapping library, and binding to obtain an enhanced object; the method comprises the following steps: acquiring mine identification data, performing electronic fence processing to obtain an early warning result, performing verification and display at a cloud to obtain a work order, and performing dynamic authentication to strengthen management and control, thereby realizing whole process processing from acquisition, analysis and early warning of the mine identification data to cloud management and control, and further ensuring safe and efficient management and control of the data.

The invention provides a data protection method, system and device for a software cipher module and a storage medium, and relates to the field of network information security. According to the technical scheme, a three-level key management system is adopted, and a master key is generated through exclusive-or operation of a random factor, an equipment factor and a user factor; double encryption protection is carried out on the random factor, firstly, the SM4 algorithm is used for encryption by taking the lower 16 bytes of the SM3 hash value of the PIN code of the user as a secret key, and then the white box secret key is used for encryption; the master key is used for protecting a module authentication key, an identity authentication key, a collaborative signature terminal private key component and the like. White-box keys are generated by the hardware device and converted into lookup tables and codes, which can prevent the keys from being extracted during execution. The system combines multiple protection measures, ensures that the secret key is not stored in a plaintext mode, improves the safety of the software password module, and is suitable for the electronic signature and data encryption requirements of scenes such as a mobile terminal.

The invention relates to the technical field of data parallel processing, in particular to a video encryption and decryption parallel acceleration processing method and system based on a national cryptographic algorithm, and the method comprises the steps: obtaining a to-be-processed data package, and carrying out the packaging of each message according to the working mode of the national cryptographic algorithm; setting an input pointer, an output pointer and a structural body pointer for the packaged message; q messages are selected from the M packaged messages; enabling the Q structural body pointers to be in one-to-one correspondence with the selected Q messages, performing encryption processing on the selected messages by adopting an SM4 algorithm, and performing hash processing on the selected messages by adopting an SM3 algorithm; judging whether all bytes in the selected message are processed or not, and if not, processing the remaining bytes in the selected message; otherwise, processing the residual messages; and obtaining video encryption data and hash data. The SM4 multi-mode parallel encryption method can support SM4 multi-mode parallel encryption of data with any length.

The invention provides a vehicle administration office business active handling method and system based on AI capability, and a storage medium. The method comprises the following steps: dynamically scanning a traffic management business database to identify a business expiration record; generating a personalized reminding verbal skill and starting an AI voice outbound call; extracting key information of the material by using an OCR technology; verifying the format and logic of the key information through a rule engine; encrypting the key information by using an SM4 algorithm, and securely transmitting the encrypted material to the internal network all-in-one machine; calling an API (Application Program Interface) to complete automatic business handling; and closed-loop management is realized through multi-channel feedback of handling results. According to the invention, the problems of untimely service handling, tedious process, unsmooth information transmission and poor interactivity in the prior art can be effectively solved, and active reminding of service expiration, full-process automatic handling, data security encryption transmission, efficient interaction of internal and external networks and user experience optimization are realized.

The invention relates to the technical field of sensor signal processing, discloses a high-frequency sampling signal processing method based on a high-density array pressure sensor, and aims to solve the problems of insufficient accuracy, safety and real-time performance of a system under high-density nodes and high sampling frequency, and the method comprises the following steps: S1, carrying out row-column cross addressing scanning and activating a preset pressure threshold node; s2, the independent analog-to-digital converters are assembled in a partition mode, and crosstalk is eliminated through time interleaving sampling; s3, the signal is enhanced through a three-stage link of pre-amplification, noise suppression and filtering, and the noise is reduced; s4, the voltage-controlled temperature-compensated crystal oscillator is matched with the phase-locked loop and the digital delay line to realize clock synchronization; s5, encrypting transmission data through a national cryptographic SM4 algorithm; s6, three-level verification is carried out to guarantee data validity; and S7, performing moving average updating on the null drift baseline and performing compensation output. According to the invention, stable sampling of 10000Hz-50000Hz is realized, the signal-to-noise ratio is greater than or equal to 90dB, the bit error rate is less than or equal to 10 <-10 >, the effective data retention rate is greater than or equal to 99.5%, and the comprehensive performance of the system is improved.

The invention relates to the technical field of information management, and discloses a personal information management method for company management, which comprises the following steps of: realizing security management through three core processes: firstly, classifying employee information according to security levels, encrypting and storing the employee information by adopting a national cipher SM4 algorithm, and particularly deleting original data after generating an irreversible digital template for biological characteristics; secondly, when the service system accesses the sensitive information, initiating real-time authorization of employees through multi-channel authentication of the same equipment, and generating a dynamic token with timeliness and permission constraint; and finally, operating the whole life cycle of the information to generate a log containing cryptographic evidence, ensuring that tampering cannot be performed through an auditing chain and a block chain, and supporting intelligent risk analysis alarm at the same time. According to the invention, controllable authorization, encrypted storage and whole-course tracing of employee information are realized, the method is suitable for sensitive information management of personnel, finance and other scenes of various enterprises, and the information leakage risk is significantly reduced.

The invention relates to the technical field of secure network communication, and discloses an industrial encryption communication method and system fusing a national cryptographic algorithm and a dynamic key mechanism, and the method comprises the steps: a transmitting end obtains a network layer data packet, analyzes a specific field of an IP head of the network layer data packet, and obtains a current timestamp; based on the specific field and the timestamp, a dynamic key sequence number is calculated through a preset key sequence number generation algorithm; extracting a corresponding encryption key and an initialization vector from a pre-stored key library which is the same as the receiving end according to the serial number; and encrypting the data load by using the CTR working mode of the SM4 algorithm, adding a timestamp to the head of the encrypted load, and sending the encrypted load. And the receiving end extracts the timestamp to perform timeliness verification, and calculates the same key sequence number based on the same field and the timestamp to complete decryption. The method realizes a one-time pad dynamic key mechanism, has the advantages of high encryption strength, good compatibility and the like, and is particularly suitable for an industrial control communication environment with high requirements on real-time performance and reliability.