64 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 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.

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 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 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 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.

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 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.

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.

The application provides a multi-bit audio watermarking method based on phase distribution and high-efficiency bit mapping, and belongs to the field of audio information hiding. The application divides multiple independent phase subintervals based on the natural distribution characteristics of phases, and can realize one-to-many mapping from single feature to multi-bit watermarking by constructing unique phase features in the phase subintervals corresponding to watermarking information. In addition, the application introduces an optimization strategy, and can realize automatic phase redistribution. The application can significantly reduce the number of subspaces / feature modes required for multi-bit embedding, and reduce the design difficulty of the multi-bit watermarking algorithm. In addition, since an automatic phase redistribution algorithm based on optimization constraints is adopted, the algorithm can more effectively balance the inaudibility and robustness.

The application belongs to the technical field of information hiding in information transmission, and discloses a steganographic text anti-steganalysis capability enhancement method based on deep learning. The method learns the characteristics of the data set in the open domain environment by using the deep learning method, generates steganographic text with the statistical distribution of the original data set while embedding secret information, and finally recommends the corresponding emoticons for the steganographic text according to the distribution of the emotional tendency and emoticons of the steganographic text in the real environment, so as to further strengthen the anti-steganalysis capability of the steganographic text. The application solves the problem of missing emotional clues in the generated text steganography, so that the anti-attack capability of the steganographic text is stronger when the steganographic text is transmitted in the public channel.

This invention discloses a multi-channel reversible information hiding method and system, relating to the field of information security technology. The method includes a carrier partitioning and data embedding stage, and a data extraction and carrier recovery stage. In the carrier partitioning and data embedding stage, the sender partitions the original binary image carrier into multiple sub-binary images and the secret data into multiple sub-secret data. The sub-secret data is then embedded into the corresponding sub-binary images to generate a coded sub-binary image, which is transmitted to the receiver via multiple channels. In the data extraction and carrier recovery stage, the receiver can losslessly recover the original binary image and secret data using any number of coded sub-binary images. This invention improves the fault tolerance of information transmission by transmitting coded sub-carriers through multiple channels, solving the problem that existing single-channel reversible information hiding methods are susceptible to interference leading to data extraction and carrier recovery failures. It is suitable for multimedia communication scenarios with high requirements for information integrity and security.

This invention relates to the field of information security technology, specifically to a method for multi-party reversible information hiding of encrypted binary images without data diffusion. The method includes: binary image encryption, where all parties use a random lattice visual cryptography to encrypt the original binary image into n encrypted binary images of the same size as the original image, and distribute them to n different information hiding parties; information embedding, where each information hiding party embeds secret information encrypted with an information hiding key into its held encrypted binary images through pattern block replacement, generating labeled encrypted binary images; and information extraction and binary image recovery, where the receiver obtains at least k labeled encrypted binary images, extracts the secret information using a random lattice visual cryptography decryption algorithm, and performs operations on the encrypted binary images to recover the original binary image. This invention solves the problems of severe data diffusion and reliance on codebooks in existing technologies, improves storage and transmission efficiency and fault tolerance, ensures the security of the original binary image, and is suitable for scenarios such as cloud storage and remote sensing communication.

The embodiment of the invention discloses a question and answer processing method and device, a storage medium and electronic device.The method comprises the steps that a user question input by a user is obtained, at least two target large models are determined from a candidate large model set, model information hiding processing is conducted on the target large models, and target hidden large models are obtained; and replying the user question by adopting the target hidden large model to obtain a reply result, and displaying the reply result.

Provided in the present application are an information hiding method, an electronic device, a storage medium, a chip system and a computer program product, which relate to the technical field of terminals. The method can be applied to an electronic device. The method comprises: displaying a first interface, the first interface comprising first information; in response to a first operation, displaying a first window in the first interface, the first window being a hidden window; in response to an operation of dragging the first information into the first window, displaying the first information in the first window; and in response to a second operation, cancelling the display of the first window in the first interface, and cancelling the display of the first information in the first interface. In this way, after the hidden window is invoked, the electronic device can display or add information to be hidden; and after the hidden window is folded, said information and the hidden window are hidden together, thereby hiding said information and improving the security of the hidden information.

The present application relates to the technical field of terminals. Provided are an information hiding method and an electronic device. The electronic device comprises a main space, a parallel space and a plurality of SIM cards. After the parallel space is bound to a first SIM card among the plurality of SIM cards, during the running of the main space in the foreground, the electronic device receives a short message from the first SIM card. When it is determined that the parallel space is not activated and an information hiding function is disabled, which indicates that when the parallel space is not activated, a user expects the electronic device to hide a short message associated with a subsystem, the electronic device may not display information of the number of a sender of the short message, thereby avoiding leakage of the information. Subsequently, the user can view the short message by means of the parallel space, thereby avoiding the loss of the short message, and the user cannot directly view the short message in a main system, thus protecting the privacy of the user.

The application belongs to the technical field of integrated circuits, and particularly relates to a single-channel analog-to-digital converter calibration system based on a memory-aware gray-box neural network. The calibration system adopts a double-layer dynamic gray-box neural network architecture, which comprises: an input layer, which is used for receiving digital output codes of an analog-to-digital converter and performing bit weight-related scaling processing; a recursive storage layer, which is used for storing output information of the analog-to-digital converter at a previous moment; a hidden processing module, which adopts a rectified linear unit as an activation function to perform nonlinear transformation on the input information; and an output layer module, which adopts a multipath data selector to replace a multiplier to generate a calibrated digital output signal. The application can realize efficient collaborative compensation of nonlinear characteristics and memory effects of the analog-to-digital converter, and significantly reduce the calculation complexity and power consumption of the calibration circuit. While ensuring calibration accuracy, the application has the characteristics of fast convergence speed and low hardware overhead.

The invention discloses a distributed photovoltaic power generation prediction method and system based on a large language model and RAG, and belongs to the technical field of new energy power generation prediction. The method comprises the following steps: constructing a photovoltaic data retrieval pool based on historical photovoltaic power data, and retrieving from the retrieval pool according to a given query sequence by using an Euclidean distance as a similarity measurement method to obtain a most relevant photovoltaic sequence and a corresponding prediction target sequence; preprocessing the query sequence, the most relevant photovoltaic sequence and the corresponding prediction target sequence to obtain a discrete fragmentation result, and embedding a timestamp to obtain a timestamp-combined information hiding state; preprocessing the descriptive language sequence to obtain an embedded vector; the hidden state combined with the timestamp information is mapped to the dimension the same as that of the embedded vector through a linear layer and is connected with the embedded vector, and final embedding is obtained; and inputting the final embedding into a pre-training language model, and mapping an output result of the pre-training language model to a prediction target space to obtain a final hidden state result.

Existing steganography techniques generate pseudo-sequences that retain only a small portion of the statistical distribution features of the original DNA sequence, resulting in poor concealment and weak resistance to steganalysis, thus leading to low security. This invention proposes a sequence-generating DNA steganography method based on conditional probability adaptive coding. First, an RNN network is used to learn the statistical distribution features of natural DNA. Then, an adaptive grouping algorithm generates pseudo-sequences highly similar to the original DNA. Experimental results show that this method significantly improves the concealment and resistance to steganalysis of the pseudo-sequences, enhancing the security of information hiding. Furthermore, given the lack of a comprehensive evaluation mechanism for the concealment of pseudo-sequences generated by existing DNA steganography techniques, this invention proposes using three parameters to evaluate the perceptual and statistical concealment of the pseudo-sequences, further refining the evaluation system for the security of DNA steganography systems.

The invention discloses a sequence-exchangeable thumbnail encryption and information hiding method, which comprises the following steps of: processing an image by layering encryption, encrypting a key visual layer by adopting an accurate TPE (Thermoplastic Elastomer) processing mode, and embedding additional information in an information bearing layer by utilizing a homomorphism-based information hiding technology. In addition, according to the scheme of the invention, flexible exchange of encryption and information embedding sequences is allowed, so that the flexibility and applicability of the system are remarkably improved. And in combination with image spatial correlation and a pseudo-random number generator, the encryption and decryption processes are efficiently executed, and the quality of the decrypted image is ensured. Experimental results show that the provided scheme achieves good balance in the aspects of privacy protection, visual availability and non-visual availability, has high processing efficiency, can effectively embed additional information on the premise of not losing image quality, and has wide application prospects.

The application provides a reversible information hiding method and system based on wavelet domain compressed sensing images, and proposes a reversible information hiding method taking a compressed sensing file as a main body, selects HL and LH parts of a wavelet domain, reconfigures a sparse measurement area of compressed sensing and an embedding mode, fully retains sparsity of compressed sensing, and thus improves compression and reconstruction efficiency of compressed sensing; under the condition of realizing reversible information hiding, very low file increment and excellent visual quality are ensured.