191 results about "Information hiding" patented technology

The invention provides a multi-feature information hidden document integrity verification and tampering positioning method, and relates to the field of network security and digital document protection. The multi-feature information hidden document integrity verification and tampering positioning method comprises the following steps: S1, document multi-dimensional feature extraction and encryption: based on an original Word document, adopting an SHA-3 algorithm to calculate a full-text hash value as a content feature, and extracting document object model features such as paragraph hierarchy, table structure and the like through a DOM tree analyzer; after the two types of features are combined into a feature matrix, a dynamic secret key is generated through Logistic chaotic mapping for XOR encryption, and an encrypted document feature matrix is generated. A dynamic key is generated by combining Logistic chaotic mapping encryption through a multi-dimensional extraction technology fusing document content hash values and structural features, so that the anti-cracking capability of a feature matrix is remarkably improved, the confidentiality of document features in open network transmission is ensured, the block information retention rate is simulated and predicted by adopting Monte Carlo, and the watermark embedding weight is dynamically allocated.

The invention relates to a packaging method for modeling and production unit combination of digital twin virtual equipment, which realizes modeling of the virtual equipment through an abstract process from top to bottom, and ensures high cohesion packaging of key attributes, states and behaviors of the virtual equipment in combination with an information hiding and uniform interface mechanism. A production unit-level combination and hierarchical packaging framework is further constructed based on the equipment model, and recursive combination and interoperation of multiple layers of modules are realized through unified station-level, production line-level and workshop-level interfaces and scheduling logic; according to the method, the modeling and packaging process of the digital twin virtual equipment is defined, the high cohesion packaging and interface uniformity of the model are highlighted, and cross-level combination and scheduling logic design are supported, so that the consistency and the implementability of the model in the system integration, evolution extension and module multiplexing processes are remarkably improved, and the modeling efficiency of the digital twin virtual equipment is improved. And universal and normalized technical support is provided for hierarchical construction and efficient deployment of virtual equipment in an intelligent manufacturing system.

The invention provides a 3D ciphertext domain reversible information hiding method and system based on spatial clustering, and belongs to the field of information security. Firstly, neighbor vertexes are classified into the same cluster space through a multistage spatial clustering algorithm, and the neighbor of the vertexes in the cluster space is ensured; then identifying the optimal reference vertex of each cluster space by using an optimal reference vertex search algorithm, so that the embedding space reaches the maximum; then, in each cluster space, multi-MSB prediction is carried out on the reference vertex and the embedded vertex, and the embeddable length of the embedded vertex is calculated; in addition, the basic embedding length of the reference vertex is used as an additional embedding space, so that the embedding capacity is further improved. And finally, embedding the data into the reserved embedding space through a bit replacement strategy. According to the scheme of the invention, a robust, high-capacity and extensible solution is provided for security data embedding of the encrypted three-dimensional model, and the method can be widely applied to live-action three-dimensional, computer graphics, digital twinning and other application scenes.

The invention discloses a reversible information hiding method and system for enhancing image smoothness, and relates to the technical field of information security, and the system comprises a preprocessing module, an information embedding module and an optimization recovery module. According to the method, the Sobel operator is utilized to calculate the image gradient map, the region is divided based on the threshold T, the smooth region and the texture region can be accurately distinguished, an accurate basis is provided for differential processing of different regions, region characteristics are fitted, large-size blocks and sub-blocks of the smooth region are divided to facilitate subsequent refinement processing based on the gradient mean value, and the processing efficiency is improved. The small-size blocks of the texture area are beneficial to operation aiming at texture features, the rationality and effectiveness of overall processing are improved, meanwhile, the pixel mean value in the large-size blocks of the smooth area is calculated, the pixel and mean value difference value is recorded, reversible low-pass filtering is carried out, and the reversibility of the image in the whole information hiding and recovering process is ensured.

The invention relates to an information compiling technical method based on a Julia fractal set, and the method comprises the following steps: S1, information coding: converting input information into a binary ASCII code, mapping the binary ASCII code into a complex number, and generating a Julia set image with a specific fractal feature; s2, obtaining a fractal dimension D: obtaining the fractal dimension D of the fractal image through a box counting method, and taking the fractal dimension D as a feature value of the information; s3, information hiding and storage: storing the fractal image feature data and the fractal dimension D in a database to realize dynamic storage of the information; and S4, information decoding and error correction: in the decoding process, obtaining the fractal dimension D of the fractal image, reversely deriving original information by taking the fractal dimension D as an index, and realizing error correction by utilizing fractal self-similarity. According to the method, the concealment of information, the efficient compression of data and the anti-interference capability can be realized by using the self-similarity and the high complexity of the fractal image.

The invention discloses a text steganography method introducing a large language model, a related method and a related device. The method comprises the following steps: segmenting a secret information bit stream into a plurality of segmented bit streams according to a preset segment length; based on the secret information bit stream and a preset segment length, collecting a knowledge graph, and constructing a candidate database and a supplementary database; coding is carried out according to all knowledge maps in the candidate database, so that the knowledge map corresponding to the first segmented bit stream is determined to serve as a selected knowledge map; inputting the selected knowledge graph into a preset knowledge graph text generation model to obtain a steganographic text corresponding to the first segmented bit stream; deleting the selected mapping knowledge domain from the candidate database, selecting one mapping knowledge domain from the supplementary database, and adding the selected mapping knowledge domain into the candidate database; and the knowledge graph coding and text steganography processes are executed again until all the segmented bit streams are processed. According to the method, the quality and naturalness of text generation are improved, and high-capacity and hidden secret information hiding is realized.

The invention discloses steganography information generation and extraction methods and devices, equipment and a storage medium, and belongs to the technical field of information hiding. The steganography information generation method is applied to a sending end, and comprises the following steps: acquiring a secret information bit stream; encrypting the secret information bit stream through a predetermined encryption algorithm by using a secret key shared by two communication parties to obtain an encrypted bit stream; based on the encrypted bit stream, driving a pre-trained sequence generation model to generate a human body posture key point sequence; drawing the generated human body posture key point sequence into a key point connected graph; inputting the key point connected graph and any figure image into a pre-trained posture guide figure image generation model to generate a figure image with a target posture; and uploading the figure image with the target posture through a public channel to transmit secret information. According to the method disclosed by the invention, the security, secrecy, flexibility and high efficiency of the steganography technology are greatly improved.

The embodiment of the invention discloses a ciphertext domain reversible information hiding method and device based on secret image sharing. A specific embodiment of the method comprises the following steps: carrying out secret sharing on secret information to be embedded to obtain a secret information sharing copy sequence; carrying out system conversion on the secret information sharing part sequence to obtain a converted information sharing part sequence; performing image scrambling on the secret image by using a preset scrambling key to obtain a scrambled image; performing region division on the scrambled image to obtain an image division region sequence; embedding each converted information sharing copy in the converted information sharing copy sequence into a corresponding image division region in the image division region sequence so as to carry out ciphertext domain reversible information hiding, and obtaining a marked sharing copy sequence; and storing the marked shared copy sequence. According to the embodiment, the calculation complexity of the encryption process can be reduced.

The present invention discloses a method and apparatus for generating and extracting steganographic information, a device, and a storage medium, and belongs to the field of information hiding technology. The method constructs a reinforcement learning Gobang game model, optimizes the selection of moves by introducing a spatial attraction matrix, calculates the attraction value of each blank position, and performs weighted adjustment on the probability of candidate actions, so that the distribution of moves conforms to the aggregation characteristics of professional players. After dynamic encoding, the secret information is embedded in the chess record through hierarchical position mapping, with a maximum capacity of 495 bits for a single game. The receiver digitizes the chess record through color space analysis and an improved circle detection algorithm, and finally decodes and restores the information. The present invention has high concealment, large capacity, and strong anti-detection performance. The generated chess record has a high degree of naturalness and is suitable for secure communication needs.

The invention aims to provide a reversible information hiding method and system based on a neural network and global pixel segmentation. According to the method, a two-layer information embedding framework is adopted; firstly, an original image is divided into a first pixel set and a second pixel set according to a checkerboard pattern, and the first pixel set and the second pixel set are alternately used as carrier pixel sets in two-layer information embedding; in each layer of information embedding operation, a predictor based on a double-branch neural network is adopted, a reference pixel set is used for predicting a carrier pixel set, and error estimation of a corresponding predicted value is given; according to the method, carrier pixel sequences are sequenced according to predicted pixel values, then pixels with prediction errors larger than a preset error threshold value are removed according to estimated prediction error limits, and the selected final carrier pixel sequences are obtained and are divided into sub-pixel sequence sets with the same length for embedding secret information. According to the method, the secret information can be well embedded into the carrier image, information hiding and reversible recovery are achieved, and information transmission safety is guaranteed.

The invention discloses an open set radio frequency fingerprint identification method and a medium, and relates to the technical field of information hiding. The method comprises the following steps: acquiring radio frequency fingerprint data based on multi-receiver fusion; inputting the obtained radio frequency fingerprint data into a feature extraction model to obtain a to-be-identified vector; wherein the trained feature extraction model generates a plurality of prototype points for each known class, and the prototype points are stored as class prototypes; and calculating the distance between the to-be-identified vector and the class prototype for class judgment or unknown class discovery, thereby realizing open-set radio frequency fingerprint identification. According to the invention, the technical problems of poor universality, weak generalization and low robustness of radio frequency fingerprints are effectively improved, and low-delay, low-power-consumption and high-accuracy identification of equipment is realized.

The present invention relates to an information compilation technology method based on the Julia fractal set. The method includes the following steps: Step S1, information encoding: converting the input information into binary ASCII code and mapping it to complex numbers to generate a Julia set image with specific fractal features; Step S2, obtaining the fractal dimension D: obtaining the fractal dimension D of the fractal image through the box-counting method as the eigenvalue of the information; Step S3, information hiding and storage: storing the fractal image feature data and the fractal dimension D in a database to achieve dynamic storage of information; Step S4, information decoding and error correction: during the decoding process, obtaining the fractal dimension D of the fractal image, inversely deriving the original information based on this as an index, and using the fractal self-similarity to achieve error correction. The present invention can use the self-similarity and high complexity of the fractal image to achieve the concealment of information, the efficient compression of data, and the anti-interference ability.

The invention provides a random discrete event system active opaqueness-based position information hiding method, which comprises the following steps of: modeling a position information hiding system into a random discrete event system, constructing a k-step active opaqueness verifier VG according to a modeled mathematical model, and further constructing a Markov chain M, calculating the probability of exposing the secret position after each position information hiding scheme is forced to be executed, judging whether the probability corresponding to at least one position information hiding scheme is smaller than a preset threshold value or not, if so, determining that the mathematical model of the random discrete event system has random k-step active opaqueness, and completing hiding of the position information; otherwise, regenerating a new position information hiding scheme; according to the method, multiple sets of position information hiding schemes are preset at the same time, active control is introduced into opaqueness research, k-step active opaqueness is verified, the opaqueness control capacity is improved, the active opaqueness application range is widened, and reliable hiding of position information can be effectively achieved.

The invention discloses a sensitive information secure transmission system, which comprises an information sending end and an information receiving end, and is characterized in that after receiving an original image and sensitive information, the information sending end generates a secret-containing carrier image through multi-scale frequency domain decomposition, sensitive information encryption scattering embedding, wavelet inverse transformation reconstruction and dual-channel processing architecture processing and sends the secret-containing carrier image; and the information receiving end extracts the encrypted sensitive information after receiving the encrypted carrier image, and analyzes and outputs the sensitive information after three-level integrity verification. According to the system, the defects of limited information hiding capacity, weak anti-interference capability, unreliable integrity detection and difficulty in self-adaption of an embedding strategy in the prior art can be overcome, high-density embedding of sensitive information, strong anti-interference performance, complete protection and self-adaption of the embedding strategy are realized, and visual concealment, image quality and transmission safety are balanced.

The invention provides an electronic bill image reversible information hiding method and device based on stream encryption, and belongs to the technical field of information hiding. In the method, an image owner encrypts an original carrier image by using encryption keys K1 and K2, and transmits the encrypted image to a data hider, and the data hider completes embedding of hidden information by using an encryption key K3. After an image user receives an encrypted image containing hidden information, if the image user obtains decryption keys K1 and K2 from an image owner, the image can be decrypted through the decryption keys K1 and K2; if the decryption key K3 is obtained from the data hiding person, hidden information in the image can be extracted based on the decryption key K3; and if the decryption keys K1, K2 and K3 exist at the same time, the original carrier image can be recovered in a relatively lossless manner. Meanwhile, the method also improves a generative adversarial network structure, and the improved network is utilized to realize accurate restoration of the image. According to the method, the image restoration quality is improved while the capacity of the embedded information is ensured.

The invention discloses an image feature matching and fusion method and system based on a multi-modal large model, and relates to the technical field of image processing, and the method comprises the steps: obtaining different modal data and internal and external parameters of imaging equipment, extracting the initial features of each modal data, and generating prior information; constructing a geometric offset matrix and a spatial scale in a unified coordinate system, calculating a cross-modal correlation graph and multiplicative injection intensity based on initial features and prior information of each modal data, obtaining optimized features of each modal data after updating, and normalizing to generate preliminary fusion features; and an information hiding mask is constructed on the preliminary fusion feature, decoupling is carried out along the geometric main direction of the geometric structure optimization feature, and a double-criterion screening channel is adopted to obtain a task selection description. According to the method, geometric guidance calculation and spatial constraint modeling are introduced, so that direction alignment and spatial consistency of multi-modal data under a unified coordinate system are realized, and the stability and reliability of a fusion process are ensured.

The invention discloses a steganographic text detection technology based on text reconstruction and word order semantic features, and belongs to the technical field of information hiding. The method comprises the following steps: selecting an open source English steganography text data set containing three fields of social platform speaking, news manuscripts and film review; words in non-steganographic text sentences in the data set are randomly disorganized and sent to a large language model for reconstruction training, and the training target of reconstruction is an original text; and randomly disorganizing a data set text, and inputting the disorganized data set text into the trained model to generate a reconstructed text. And finally, inputting the original text, the disordered text and the reconstructed text into a steganography detection model, calculating a cosine similarity matrix, extracting a semantic difference feature map through a CNN, flattening, splicing semantic vectors of the original text, and inputting the semantic vectors into a classifier to output a binary detection result. Through continuous training, an error between a classifier output result of the model and a real labeling result is continuously reduced, so that parameters of a feature extractor and a classifier are optimized, and the model steganography detection accuracy is improved. According to the method, semantic information and word order features are utilized for classification, high accuracy, low cost and good interpretability are achieved, steganographic texts can be effectively detected, and information safety is improved.

The invention relates to the technical field of low-power wide area network communication and information hiding, and discloses a LoRa-based covert communication method, which comprises the following steps of: at a transmitting end, generating a key-driven perturbation sequence according to covert information to be transmitted, constraining perturbation parameters through an undetectable controller, and transmitting the perturbation sequence to a receiving end; performing symbol-level perturbation modulation on the linear frequency modulation slope of the LoRa signal, and embedding a low-speed synchronous beacon in a preamble symbol counting tolerance range; at a receiving end, conventional data is demodulated through a standard LoRa receiving process, a frequency offset residual error, a phase residual error and a symbol fitting error after de-spreading are extracted in parallel, related detection is carried out by using a key consistent with a sending end, and hidden information is extracted from a residual error domain; the undetectability controller dynamically adjusts perturbation magnitude and embedding density based on a distribution difference metric. The objective of the invention is to solve the problem that communication reliability and hidden undetectability are difficult to guarantee at the same time in a LoRa system.

The invention discloses a sensitive data security storage method based on image information hiding, which comprises the following steps: encrypting information M to be hidden by using a key K to obtain a ciphertext C; encrypting the key K to obtain an encryption key EK, decomposing the encryption key EK into a master secret share and a recombined secret share, and decomposing the recombined secret share into n-1 secondary secret shares; hiding the master secret share, the ciphertext C and a randomly generated random value R in the image; and respectively storing the n-1 second-level secret shares and the key expiration time T at n-1 users in the system. According to the method, the hierarchical linear secret sharing technology and the image information hiding technology are combined, the security of sensitive data storage can be improved, a user can extract information from the image only by using a password, the method is not limited by certain specific equipment, and the operation convenience is high.

The invention discloses a relay transmitting type information hiding transmission system and method based on a USB interface, and the system comprises a target host which is used for connecting a target network, and receiving and transmitting first target data to USB interface equipment; the USB interface equipment is used for receiving and processing the control instruction information transmitted by the data return receiving equipment, acquiring and processing first target data transmitted by the target host, and transmitting second target data to the data return receiving equipment; and the data return receiving equipment is used for receiving and processing second target data transmitted by the USB interface equipment to obtain target message data. According to the relay transmitting type information hidden transmission system and method based on the USB interface, the USB data interface equipment is adopted, high-value information of the target host is obtained, the data return hidden performance is high, and the high-value information obtaining problem is solved.

This invention discloses a method for embedding a hidden two-dimensional dot matrix watermark using a splicable, cut-out, and fully embedded method. It includes: (1) data normalization encoding; (2) data information signature; (3) multiple error detection and correction encoding; (4) two-dimensional dot matrix; (5) pseudo-random scrambling of the dot matrix data; (6) scale matching with the associated carrier image; (7) generation of a two-dimensional dot matrix point cloud; and (8) embedding the hidden two-dimensional dot matrix point cloud into the associated carrier image. This invention is an information hiding method based on the combination of reliability encoding and printed image processing in modern communication technology using two-dimensional coded dot matrices. It can hide anti-counterfeiting marks, images, or text within printed images to achieve information anti-counterfeiting and information traceability. This method improves the anti-attack capability of the two-dimensional dot matrix and overcomes the problem of unreadable information caused by image damage or misjudgment during printing and optical image acquisition.

To provide a security system based on hidden information for electronic document security that maintains security grades and log-related information even when electronic document data is transformed and sustains the policy security process.SOLUTION: In a security system, a security agent 30 provided in a client C1 includes a hidden information module that analyzes the source code of an electronic document executed by an OS-based word processor unit, searches for custom.xml, which is hidden information with fmtID as an identification value, and confirms authority information, a content execution module that coordinates the content execution of the electronic document by the word processor unit, and a security module that hides custom.xml, in which the authority information of the electronic document is composed, at a specific position in the source code of the electronic document data by the steganography technique to generate it as hidden information with the specified fmtID, and limits the tolerance of content by comparing the authority information with reference information.SELECTED DRAWING: Figure 1

The invention provides an instant messaging method for automatically detecting sensitive information hiding, which comprises the following steps of: 1, aiming at a configured sensitive word set, constructing a sensitive word character sequence logic organization structure, and orderly bearing a single sensitive word in the sensitive word character sequence logic organization structure through a plurality of character mapping units on the same logic path, each character mapping unit corresponds to a single character in the sensitive word, the character mapping units pass through a preset logic association relationship, and the logic association relationship represents the sequence of the characters in the sensitive word; 2, on the basis of the constructed special character set, special characters in a to-be-filtered text generated in instant messaging are filtered out, and only non-special characters are reserved to form a to-be-matched character sequence; and step 3, matching the to-be-matched character sequence with the sensitive word character sequence logic organization structure to determine sensitive information in the to-be-filtered text. According to the scheme, the missed judgment problem of a traditional scheme is solved or relieved in a targeted manner.

The invention discloses an image information hiding method, electronic equipment and a storage medium, and the method comprises the steps: obtaining a current detection result obtained by carrying out the target detection of a current frame image, and obtaining a preset region in a reference image; wherein the reference image and the current frame image are acquired by the same image acquisition equipment under the same acquisition condition; determining a dynamic shielding area in the current frame image based on the current detection result; based on a preset area of the reference image, determining a static shielding area in the current frame image; and carrying out information hiding on the dynamic shielding area and the static shielding area in the current frame image. In this way, information hiding missing can be avoided, and the information protection effect is improved.

The invention relates to the technical field of carrier-free image steganography, and discloses a carrier-free image steganography based on a diffusion model and human body posture estimation, which comprises the following steps of: S1, converting secret information into a binary sequence according to an ASCII (American Standard Code for Information Interchange) code, and taking the binary sequence as a secret sequence to be encrypted; s2, extracting a large number of human whole body images from the network, according to a pre-trained human body posture estimation model, extracting posture key point information of a target image, key point arrangement features such as an angle between an arm and a trunk and the like, grouping a series of images, and according to a binary bit number set by each image, dividing the images into 2n groups; according to the carrier-free image steganography based on the diffusion model and the human body posture estimation, the encryption information capacity of a single picture is improved, the similarity of theme contents among multiple pictures is kept, the confidentiality and robustness are enhanced, the flexibility and expandability are improved, and the information transmission and storage efficiency is optimized; and efficient, safe and hidden information hiding and transmission are realized.

The application discloses a method for realizing covert communication by using a terahertz high-speed data transmission, which combines information hiding technology with a terahertz high-speed data transmission system, uses original data of a terahertz high-speed data transmission channel as a carrier, carries out digital sampling on an analog signal which needs to be separately transmitted, modifies values of a data part of the carrier, matches the data to be hidden with a function value of the carrier data, hides marking information in the data containing the hidden information, and further improves quality of the carrier data at a receiving end, and saves channel resources for transmitting the analog signal. The information hiding process is carried out at a front end of the terahertz high-speed data transmission system, and does not change a terahertz wireless communication system. The hiding method is simple and flexible, and PSNR is improved by 3 dB compared with a least significant bit replacement method under the condition of the same hiding capacity.

The invention discloses an information hiding anti-counterfeiting method based on a visual perception system and a printing method for a packaging box, and the information hiding anti-counterfeiting method comprises the steps: 1, inputting an original information image I, and carrying out the binarization processing, and obtaining a to-be-hidden information silhouette image B; 2, generating a salt and pepper noise image with the same size as the original information image I through image processing software or a computer programming language, and taking the salt and pepper noise image as an encrypted substrate binary dot image N; 3, copying an image N as a to-be-processed binary dot image N ', and performing pixel transformation on the image N' by taking the to-be-hidden information silhouette image B as a mask through image processing software or a computer programming language to obtain a transformed information hidden image H; and 4, superposing the encrypted substrate binary dot image N and the information hiding image H to obtain a target image C. The method is simple to operate, easy to implement and high in safety, and improves the anti-counterfeiting verification efficiency.

The application discloses a ciphertext domain reversible information hiding method of all-0 row and all-0 column coding, and is characterized by comprising the following steps: 1) coding of all-0 row and all-0 column of a bit plane block; 2) compression space calculation of the all-0 row and all-0 column coded bit plane block; and 3) reversible information hiding of the all-0 row and all-0 column coded bit plane block. The method has the advantages of large embedding capacity and high security.

The present invention discloses a language steganalysis method based on knowledge injection and knowledge encoding, which belongs to the field of information hiding. First, a language steganalysis system model based on knowledge injection and knowledge encoding is constructed. The system model preprocesses the input sentence with the help of a knowledge graph to complete the knowledge injection. Then, BERT is used on the sentence tree and the visible matrix to complete the extraction of semantic features and perform knowledge injection semantic encoding. During the preprocessing, a KE module of graph structure modeling is used to extract knowledge from the input sentence and the knowledge graph to obtain a mini-graph, and the mini-graph is knowledge encoded by GAT. Finally, the captured entity node features and the representation vector obtained from the knowledge injection module are connected in series and added to a fully connected layer. The system model predicts whether the input text is a normal carrier or a steganographic carrier through the output of the fully connected layer. The present invention solves the fragmentation problem of network text and makes the results of language steganalysis more accurate.

This invention discloses an optimal method for dual-protection text hiding, comprising the following steps: Step 1: Encrypting the carrier text using the SHA256 algorithm to generate a hash digest 'a'; Step 2: Embedding the secret information and hash digest 'a' into the three components of the carrier text's color pixel values ​​R, G, and B using an information hiding algorithm to form steganographic text; Step 3: Sending the steganographic text to a receiver; Step 4: The receiver receives the file, which is either steganographic text, legally modified steganographic text, or illegally tampered steganographic text; Step 5: The receiver extracts a hash digest 'b' from the file using the SHA256 hash algorithm; Step 6: Checking if hash digest 'b' is equal to hash digest 'a'. If they are not equal, it indicates that the secret information has been illegally tampered with; if they are equal, the receiver extracts the secret information. This invention combines hash encryption technology with text information hiding technology that minimizes pixel modification, thereby ensuring the integrity and security of the file during transmission to a greater extent.