108 results about "Information hiding" patented technology

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 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 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 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 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 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.

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 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.

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.

The invention belongs to the crossing field of information hiding and digital image processing, and particularly relates to an image steganography method and system based on frequency domain transformation and a reversible neural network, and the system comprises a wavelet transformation module which is used for executing frequency domain decomposition of a carrier image, a secret image and a steganography image, the inverse wavelet transform module is used for executing reconstruction from frequency domain features to pixel domain images, the reversible network is used for realizing reversible conversion of 24-channel fusion features, the reversible network is formed by sequentially connecting 16 GlowBlocks in series, and each GlowBlock comprises an activation standardization layer, a reversible 1 * 1 convolution layer and an affine coupling layer which are cascaded. According to the method, through the cooperation of the frequency domain feature hierarchical modeling and the reversible network, while the steganography reversibility is ensured, the visual difference between the steganography and the original carrier is remarkably reduced, the recovery precision of secret information is improved, and the method is suitable for image steganography scenes with high requirements for reversibility, concealment and recovery quality.

The invention discloses a quantization index modulation steganography method based on chaos assistance, and aims to improve the security and concealment of information hiding. According to the method, a high-complexity pseudo-random sequence is generated by combining a delay coupling Lorentz chaotic system, the pseudo-random sequence is converted into a uniformly-distributed sequence through modular lattice operation, the uniformly-distributed sequence serves as external jitter to be introduced into a lattice quantization process, and therefore safe embedding of messages is achieved. According to the method, high-density embedding can be realized while carrier signal statistical characteristics are kept to effectively resist statistical steganalysis, and the method has relatively good image quality and robustness and is suitable for various types of digital carriers such as images, audios and the like.

This invention belongs to the field of information security technology and discloses a method and system for reversible information hiding based on global sorting of single-pixel values. The method includes: dividing the processed carrier image (excluding the first row) into four pixel layers, and globally sorting the pixels in each layer to obtain a one-dimensional pixel sequence; based on the one-dimensional pixel sequence, for all pixel segment sizes within a selected range, determining whether to embed secret information in each pixel segment according to the relationship between a preset complexity threshold and the complexity of each pixel segment; and selecting the carrier image with the lowest distortion as the final encrypted carrier image. This invention solves the technical problem in existing technologies where relying solely on local spatial correlation block division of images limits the performance of reversible information hiding, and improves the hiding performance of reversible information hiding.

The invention provides an anti-mapping method based on an xdp technology. The anti-mapping method comprises the following steps: S1, monitoring and analyzing a network message in real time by adopting the xdp technology; s2, judging whether the network message is a scanning message or not, if so, entering a step S3, and if not, entering a step S9; s3, analyzing and scanning the message through the knowledge base; s4, judging whether the scanning message is a port detection message or not, if so, entering a step S7, and if not, entering a step S5; s5, judging whether the scanning message is an OS detection message or not, if so, entering a step S7, and if not, entering a step S6; s6, judging whether the scanning message is a service detection message or not, if so, entering a step S7, and if not, entering a step S9; s7, returning a forged message; s8, returning to the step S1; and S9, directly forwarding the network message. According to the invention, special identification is carried out for network scanning and network surveying and mapping, an alarm is given after identification, a scanning result is prevented from being returned or modified, a hacker obtains a wrong scanning result, and the purposes of information hiding and information camouflage are achieved.

The invention discloses a coding watermark pattern generation, hiding and detection method, which comprises the following steps of: firstly, establishing a Cartesian coordinate system for an original graph, calibrating, further quantifying the gray scale of the original graph into dark and light color blocks, and further splicing the adjacent dark and light color blocks into a virtual graph block; the method comprises the following steps of: performing channel coding on source data to be hidden, generating a coding sequence, further modulating the coding sequence by adopting a two-dimensional spreading code, generating a two-dimensional matrix signal, performing two-dimensional inverse cosine transformation, forming a two-dimensional spatial domain signal, performing amplitude modulation, forming a matrix graph, and performing information hiding on a virtual graph block; in the detection and verification stage, the steps of gray scale quantization and virtual graph block splicing are also performed, then two-dimensional cosine transform is performed, demodulation is performed based on a prior spreading code, a received signal sequence is further recovered according to the coding sequence of the virtual graph blocks, channel decoding is further performed, and authenticity verification of information is completed. According to the invention, the information security degree and the anti-counterfeiting level are improved.

The embodiment of the invention discloses an information hiding method, an information management method and a related device. The information hiding method comprises the following steps: receiving an information hiding operation triggered by target information in a target session interface; the information hiding operation has a corresponding target object; and in response to the information hiding operation, displaying the target content at a display position corresponding to the target information in the session interface of the target object, the target content is display content obtained after the target information is hidden. According to the method, target information needing to be hidden is autonomously determined by triggering an information hiding operation, so that a user can flexibly trigger hiding of information in a target session interface according to actual requirements, and a target object corresponding to the information hiding operation can be set; in this way, under the conditions that the target object views, shares the session interface and the like, only the target content obtained after hiding processing is conducted on the target information is displayed, the target information is not displayed, and the security of session interface information display is improved.

The embodiment of the invention provides an information hiding method and system, edge equipment and end equipment, and the method comprises the steps: decrypting encrypted data sent by the end equipment, and obtaining decrypted to-be-transmitted secret information; dividing the carrier image into image sub-blocks which are not overlapped with each other according to the preset number of pixels contained in each embedding unit, enabling each image sub-block to contain the number of pixels, grouping the secret information, and enabling each group to contain the number of bits of the pixels; for each image sub-block, substituting a preset bit of each pixel in the image sub-block into the mapping function for calculation to obtain a calculation result corresponding to each bit in the secret information group; under the condition that the calculation result corresponding to each bit and the corresponding bit meet a preset numerical relationship, embedding of the secret information group is completed; and sending a secret carrying image generated after embedding is completed. According to the information hiding method provided by the embodiment of the invention, the application scene is more flexible, and the requirement on hardware equipment is reduced.

This invention discloses an adaptive dual-image reversible information hiding method based on a Sudoku matrix. First, an original carrier image is copied twice, and a Sudoku reference matrix is ​​established. Next, the secret information of the binary random bit string is divided into groups of 6 bits each, and each group is converted into two octal secret numbers. A pair of pixel values ​​from the original carrier image is mapped onto the Sudoku reference matrix, establishing a quantization distortion model. Then, based on the quantization distortion model, the optimal distance threshold and optimal embedding strategy are determined, and two cryptic images are generated. Finally, two receiving ends establish the same Sudoku reference matrix as the sending end, recover the pixel pairs of the original carrier image, traverse all pixel pairs of the cryptic images, and convert the extracted secret numbers into binary bit strings. This invention significantly improves image visual quality, is very simple and practical to operate, and effectively enhances the security of information transmission.

The invention relates to the technical field of information security, in particular to a ciphertext binary image multi-party reversible information hiding method without data diffusion. The method comprises the following steps: binary image encryption: all parties encrypt an original binary image into n ciphertext binary images with the same size as the original image by using a random lattice visual password, and distribute the n ciphertext binary images to n different information hiding parties; information embedding: each information hiding party embeds the secret information encrypted by the information hiding key into the held ciphertext binary image through mode block replacement to generate a marked ciphertext binary image; and information extraction and binary image restoration: the receiver obtains at least k marked ciphertext binary images, extracts secret information through a random lattice visual password decryption algorithm, and performs operation on the ciphertext binary images to restore the original binary image. The method solves the problems of serious data diffusion and dependence on a codebook in the prior art, improves the storage and transmission efficiency and fault tolerance, guarantees the safety of an original binary image, and is adaptive to scenes of cloud storage, remote sensing communication and the like.

The invention relates to a method for hiding dynamic image information based on a depth generation model, which comprises the following steps that: a sender processes secret information and encrypts the secret information into a ciphertext by using a key; mapping the ciphertext to standard Gaussian distribution; the sender performs iterative denoising on the standard Gaussian distribution containing the secret information in combination with a controllable text and a motion module to generate a GIF containing the secret information; and the receiver decrypts the information through inter-frame comparison after receiving the information. By adopting the method and the device for hiding the dynamic image information based on the depth generation model, the processor and the computer readable storage medium, the security of information hiding is remarkably improved, and the embedded secret information is ensured not to be easily detected by a third party; the robustness of information hiding is enhanced, and it is ensured that the embedded information can resist common distortion operation; high-concealment information embedding and reliable information extraction are realized, and the user experience and the system practicability are improved.

The invention relates to a reversible information hiding method and system for a multi-pixel embedded image, and the method is used for predicting the predicted values of a plurality of pixels in image blocks based on a pixel value sorting method, and is used for fully utilizing the spatial correlation between the pixels in a prediction process. An improved pixel spatial position definition method is used, the inverted number of pixel value size serial numbers is calculated according to the spatial position and pixel value distribution of each pixel in each block, and pixel spatial position rearrangement of the block is completed according to the inverted number. According to the method, the problem that the prediction precision and the embedding efficiency are reduced due to the fact that spatial correlation between pixels is not sufficiently mined when different embeddable images are faced due to the fact that in-block pixel value sorting prediction solidification is executed in an existing PVO method is solved, and more displacement errors are converted into extensible errors for embedding secret information. According to the invention, image distortion caused by embedding can be further reduced while the embeddable capacity is improved.

This invention proposes a method and system for reversible information hiding in 3D encrypted domains based on spatial clustering, belonging to the field of information security. First, a multi-level spatial clustering algorithm is used to group nearby vertices into the same cluster space, ensuring the proximity of vertices within the cluster space. Then, an optimal reference vertex search algorithm is used for each cluster space to identify the best reference vertex, maximizing the embedding space. Subsequently, in each cluster space, multi-MSB prediction is performed on the reference vertex and the embedded vertex to calculate the embeddable length of the embedded vertex. Furthermore, the basic embedding length of the reference vertex is used as additional embedding space to further improve the embedding capacity. Finally, a bit substitution strategy is used to embed the data into the reserved embedding space. This invention provides a robust, high-capacity, and scalable solution for secure data embedding of encrypted 3D models, and can be widely applied to scenarios such as real-world 3D, computer graphics, and digital twins.

This invention discloses a method for information hiding and intelligence transmission based on lattice cipher signature fields. This method allows both communicating parties to simultaneously extract secret information upon correct signature verification, thereby achieving information hiding and communication within the lattice cipher protocol's signature field. This invention records all operations of both communicating parties, ensuring traceable operational traceability. Furthermore, this invention constructs a client and a server, with the server managing the client's information and operations. The client can communicate as both an intelligence sender and receiver. Based on the fault tolerance of lattice ciphers, this invention achieves lossless extraction of secret information and recovery of the carrier without requiring any external information. It also improves upon the classic differential extended steganography scheme, ensuring a high information embedding bit rate even with a small number of carriers.

This invention provides a method and apparatus for identifying online nuisance text, comprising: preliminarily judging the target online text by extracting URL links from the target online text; if the judgment cannot be made, calculating the invalid information score and generating a pinyin list, a keyword list, and a keyword pinyin list for the target online text; calculating the online nuisance score for each keyword by analyzing the distribution of the character elements of each keyword in the target online text and the distribution of the keyword pinyin in the pinyin list of the target online text; revising the online nuisance score based on the invalid information score, and obtaining the online nuisance text recognition result based on the revision result. This invention can accurately identify online nuisance text through fuzzy matching of online nuisance keyword characters and pinyin, and can effectively address information hiding methods such as segmentation, reverse order, vertical text arrangement, and homophones in the target text.

The application discloses a kind of based on multimodal big model's image feature matching and fusion method and system, it is related to image processing technical field, including, obtain different modal data and the internal and external parameters of imaging device, extract the initial feature of each modal data, generate prior information;Geometric bias matrix and space scale are constructed in unified coordinate system, based on the initial feature of each modal data and prior information, calculate cross-modal correlation graph and multiplicative injection coefficient, update to obtain the optimized feature of each modal data, normalization generates preliminary fusion feature;Information hiding mask is constructed on preliminary fusion feature, decouples along the geometric main direction of geometric structure optimization feature, and adopts double criterion to select channel and obtain task selected description.The application realizes the direction alignment and space consistency of multimodal data in unified coordinate system by introducing geometric guide calculation and space constraint modeling, guarantees the stability and reliability of fusion process.

This invention relates to the fields of information hiding and digital watermarking technology, and discloses a reversible watermarking method based on asymmetric histogram translation using dual-weighted prediction. The method involves dividing the image into core and edge regions, with the core region further divided into 2x2 sub-blocks and categorized into four sets: A, B, C, and D. Overflow value processing is uniformly applied to sets A, B, C, and D. Step-by-step prediction is used, with sets A and B as the primary embedding objects, to predict the prediction error values ​​of four pixels. After filtering, asymmetric histogram translation watermark embedding is performed. Similarly, step-by-step prediction is used, with sets C and D as the primary embedding objects, to predict the prediction error values ​​of four pixels. After filtering, asymmetric histogram translation watermark embedding is performed. Watermark extraction is the reverse process of watermark embedding, performed in the order of D, C, B, and A. Compared with existing technologies, this invention increases pixel compensation, further improving watermark embedding capacity and image visual quality.