13 results about "MD5" patented technology

The invention belongs to the technical field of laser equipment control, and particularly relates to a laser cleaning equipment stage secret key data processing method and system, and the method comprises the steps that a server generates a unique authorization secret key through a multi-layer encryption algorithm containing MD5 and AES based on an equipment serial number, expiration time and authorization duration; and the device end receives the secret key input by the user, decrypts the secret key by using locally stored information, performs cross verification on the intermediate ciphertext generated by the same algorithm, and updates the effective usage period of the device according to the authorization duration in the secret key after the verification is passed. The system comprises an off-line working server upper computer and a laser cleaning equipment client comprising an MCU, a clock chip and a touch screen. The technical problem that flexible, safe and low-cost software authorization and locking management of laser cleaning equipment without a networking function is difficult to achieve is solved, accurate authorization control of one machine with one code and one time period with one code in an offline state is achieved, operation is convenient and fast, and safety is high.

The invention relates to a territorial resource survey result storage method and system based on artificial intelligence, and aims to solve the problems of low efficiency and insufficient intelligence in the storage verification process of massive survey result data. The system preprocesses uploaded data through a survey result reading and analyzing unit, extracts core content and generates a unique identifier; the MD5 storage verification unit is used for realizing rapid comparison and result reuse; and when direct matching cannot be performed, the survey result storage and verification unit performs deep verification in combination with the encrypted information table, and manual verification can be triggered. The system is further provided with a processing unit, through maintaining a log table and a mapping relation pair, historical verification experience is dynamically accumulated, and features which are stable in conclusion and appear at high frequency are converted into a rapid judgment basis, so that an intelligent verification assembly line with self-learning and self-adaptive capabilities is formed. According to the method, the automation level and the processing efficiency of storage verification are remarkably improved while the data security and the verification preciseness are guaranteed.

This invention belongs to the field of embedded software technology and discloses an MD5 algorithm optimization method and system based on embedded software. In byte data processing, this method uses a defined MD5 calculation main function combined with three interface functions and data structures to form an MD5 calculation module. This module provides MD5 cycle-by-cycle calculation services for byte data processing to the upper-level user module and determines whether each clock cycle times out. This invention proposes an optimization method for the MD5 algorithm in embedded software. Leveraging the consistency of the algorithm's calculation process in each loop, the total time consumed by the algorithm is evenly distributed across several adjacent software cycles, effectively preventing timeouts in individual cycles caused by calling the MD5 algorithm function. Furthermore, this method does not use system calls related to multi-threaded operations, is independent of the operating system platform, and facilitates software code portability and promotion.

The invention provides a method and a device for generating a hash value of a burning configuration file, and aims to improve the generation efficiency of a vehicle-mounted burning configuration file through a method for screening a target file after file name matching and performing block streaming calculation on the MD5 hash value of the target file. The method for generating the hash value of the burning configuration file comprises the steps that when the size of a target file to be written is larger than a preset value, a file name list in a [MD5CHECK] data block of an initial configuration file of a vehicle-mounted burning program is obtained; determining the file of which the file name in the file name list is consistent with the file name in the target folder as a target file; the MD5 hash value of the target file is calculated in a block streaming processing mode, and the first data block and the second data block are adjacently read data blocks; and writing the first data block, the second data block and the corresponding MD5 hash values into the [MD5CHECK] data block of the target file to obtain a burning configuration file.

The application relates to the computer technical field and discloses an MD5 check data generation method, device and equipment and a storage medium. The method comprises the following steps: obtaining a first string to be processed; performing feature extraction on the first string to obtain a feature string representing feature information of the first string; generating a first salt value associated with the first string based on the feature string; and processing the first salt value and the first string through an MD5 algorithm to generate check data. The method can improve the difficulty of cracking the MD5 check data and enhance the data security of the MD5 salt check scheme.

The application relates to a data transmission protection method based on combination of an HMAC-MD5 algorithm and key pre-distribution, which combines a key pre-distribution scheme and an HMAC-MD5 algorithm based on symmetric cryptography and integrates a key pre-distribution management scheme based on a hash mechanism; that is, before data information participates in communication encryption transmission, the key held by a node is preloaded, and the one-way characteristic of a hash function is utilized to hide part of the key information of the node; the application utilizes the one-way characteristic of the hash function and the key pre-distribution to hide part of the key information of the node to a certain extent, that is, to reduce the number of key leaks of the node, and then to reduce the possibility of destruction of other links of the network by an attacker, so that the security of node communication is improved.

The application discloses a Bluetooth key symmetric key authentication method and system, which comprises the following steps: initiating Bluetooth automatic pairing to a TBox, checking pairing by the TBox; sending a LEAF type check key to the TBox, and comparing the LEAF key with a ROOT key saved by the TBox; initiating a seed application to the TBox, generating an encrypted seed when the TBox receives the application, and returning the seed; performing MD5 on the seed+VIN+date by the TBox, and obtaining a 32-bit string used as an encrypted key of a control instruction; checking the encrypted key; encrypting the control instruction by using the encrypted key, and outputting the ciphertext to the TBox; decrypting the control instruction by using the encrypted key after the TBox receives the ciphertext control instruction, and executing the control instruction; and encrypting the execution result by the TBox, and returning the execution result. The technical scheme of the application establishes a Bluetooth interaction scheme between a mobile phone APP (mobile phone) and a TBox (a TBox provided with a Bluetooth key device), and the whole scheme adopts a symmetric encryption system, so that the information safety is ensured, and the rapidity of instruction response is considered.

This invention relates to a method for backing up electronic geological data files, belonging to the field of data backup. The method includes: a dynamic backup strategy determination step, which classifies and grades data according to its confidentiality, size, and intended backup medium, matching differentiated strategies and executing backups using a pipelined scheduling approach; a content-based redundancy deduplication step, which uses MD5+SM3+CRC32 calculations to build a global index to eliminate redundant data; a file segmentation and reassembly step, which automatically segments large files exceeding 50GB into 10GB sub-files and records the segmentation metadata; a file storage and security step, which randomly selects 2-3 data blocks based on the size of the electronic geological data file for encrypted replacement, encrypts metadata using the SM4 algorithm, and ensures data security through role-based access control, integrity verification, and audit logs; and a backup check and recovery step, which performs automatic verification, annual sampling checks, and heterogeneous recovery. The method improves storage efficiency through intelligent deduplication and tiered strategies, and enhances data security through encryption and integrity verification.

This invention provides a method for constructing high-quality metal material process datasets based on a large language model, relating to the field of process data collection and processing technology. It introduces a chemical composition hashing (HC) mechanism, which transforms complex composition information into unique identifiers through standardized concatenation of a preset element set and MD5 hashing, enabling efficient and accurate cross-file comparison. A three-level duplicate detection system—precise duplicates → similar duplicates → LLM intelligent confirmation—effectively avoids false rejections due to differences in expression while ensuring high recall. A prompting engineering system is constructed based on a locally deployed large language model, integrating domain knowledge templates and strict output format constraints. This achieves complete reconstruction and structured expression of complex process chains without manual intervention, enabling end-to-end extraction of standardized material entries from massive amounts of unstructured documents. Furthermore, semantic-level feature hashing and LLM-assisted judgment mechanisms significantly improve deduplication accuracy and logical consistency.

The application provides an MD5-based encryption fusion storage method, comprising the following steps: extracting different characters according to the characteristics of the final storage value of the MD5 algorithm, mapping and encoding the extracted characters with different characters to obtain a key mapping table; obtaining a password string to be encrypted; calculating the number n of characters occupied by a random factor at most, and randomly obtaining m characters from all the characters as the random factor; performing MD5 calculation on the password string and the random factor to obtain a calculation result; performing binary conversion on each character of the random factor to obtain a binary index value of the random factor; comparing the binary index value of the random factor with the calculation result, searching the key mapping table, mapping each character of the calculation result, obtaining the fusion result of the binary index value of the random factor and the calculation result, and storing the fusion result. The application also provides an electronic device and a medium, which can save storage space, facilitate the upgrading of new and old schemes, and improve security.

The application discloses a quasi-state judgment method and a quasi-state judgment device based on control flow comparison, and the method comprises the following steps: identifying characteristic codes in a source code of a to-be-tested executable program; generating a random value as a code landmark by using a pseudo-random function, and inserting the code landmark at the characteristic codes; based on a compiler segment base address randomization technology, setting different code segment and data segment base addresses for the source code after the insertion of the probes, and compiling the source code into multiple equivalent heterogeneous execution bodies; inputting a to-be-tested sample into the multiple heterogeneous execution bodies to generate multiple execution control flow records; dividing the execution control flow by taking a jump instruction as a path segment endpoint, and calculating the Hash value of the code landmark in the path segment by using MD5; calculating the Hamming distance between the multiple control flows based on the Hash value, judging the path similarity, and determining that the to-be-tested sample is a normal sample if the multiple path control flows are similar; otherwise, determining that the to-be-tested sample is an abnormal sample. The application has high quasi-state judgment accuracy and efficiency for vulnerability exploitation attacks.

The present disclosure provides a log desensitization method, device, equipment and medium, relating to the technical field of network security. The method comprises: extracting a sensitive information field in the log data to be desensitized; processing the sensitive information field based on a message digest algorithm MD5 to obtain an MD5 value of the sensitive information field; performing hash calculation on the sensitive information field based on a preset zero collision hash algorithm to obtain a hash value of the sensitive information field; and performing desensitization processing on the MD5 value and the hash value to obtain a desensitization result of the log data to be desensitized. The present disclosure adopts the MD5 algorithm combined with the zero collision hash algorithm, effectively solves the log desensitization processing of the sensitive information field in the log data to be desensitized, also meets the requirement of zero collision of the desensitization result, maintains the data security, and ensures the uniqueness and correlation of the data after desensitization.

The application discloses a source-load-storage resource collaborative optimization method and system, relates to the source-load-storage resource optimization technical field, and the application constructs the magic encryption salt of the current pre-connection user according to the magic salt stored in the current memory by the authentication execution unit after obtaining the identity authentication information entered by the current pre-connection user, uses the magic encryption salt and the entered login password as two parameters to obtain the identity ciphertext information by using the MD5 algorithm, the generation process of the magic encryption salt is based on the construction of the last magic encryption salt in the process, and different ways are adopted to obtain the corresponding magic characters of the uppercase letters, the lowercase letters and the numbers in the process of constructing the magic encryption salt, so that the finally obtained magic encryption salt has high anti-collision property and safety, the safety in the identity authentication process is ensured, the safety of the source-load-storage resource data receiving in the source-load-storage resource collaborative optimization process is further ensured, and the optimization result is more accurate and efficient.