81 results about "Steganography" patented technology

The invention relates to the technical field of data encryption, in particular to a VPN dynamic hierarchical encryption system and method for cross-border data transmission, and the method comprises the steps: dividing a data flow into different hierarchies based on information entropy; the high-entropy core data is embedded in a steganography mode through a chaos algorithm by means of the low-entropy redundant space; carrying out global basic encryption on the mixed carrier, and respectively executing chaotic scrambling and differential iterative diffusion for the steganography region and the middle entropy region; dynamically injecting a filling block according to entropy feedback to realize flow homogenization shaping; and splitting the deconstructed index through threshold secret sharing, and performing hidden distribution. According to the method provided by the invention, the concealment and security of cross-border data transmission can be effectively improved.

The invention discloses a language steganography load enhancement method and device based on a large language model. The method comprises the steps that firstly, a shared semantic restorer obtained through fine adjustment of the large language model LLM is constructed; the sender performs low-redundancy compression and key information protection on the secret message to be processed through the shared semantic restorer; converting the obtained compressed message into a pseudo-random bit stream through index compression coding based on probability; embedding the pseudo-random bit stream into a carrier text generated by a large language model LLM through an underlying steganography algorithm to obtain a steganography text, and transmitting the steganography text through a common channel; and after receiving the steganography text, the receiver losslessly recovers the original secret message through reverse operation based on the steganography algorithm shared with the sender, the coding mode and the shared semantic restorer. According to the method and device, the processing flow of the secret message is optimized through the large language model, and efficient compression and lossless recovery of the secret message are achieved.

The application discloses an AAC security steganography algorithm and system based on a masking effect. The human ear hearing masking effect can cause some audio signals with low intensity to be masked by signals with high intensity, and there is space for hiding secret information. Therefore, the application analyzes a quantization process of MDCT coefficients in AAC coding, records the masked audio signals as modifiable positions, and combines an STC adaptive steganography framework to realize embedding of secret information. Experimental results show that the algorithm can achieve a maximum embedding capacity of 13.61 kbps, can guarantee auditory concealment of speech, and has good security.

The invention discloses a fault detection method for multi-modal sensing data fusion and embedded optimization for intelligent manufacturing, and the method comprises the steps: detecting the operation state of intelligent manufacturing equipment, collecting multi-modal sensing data, and carrying out the preprocessing of the multi-modal sensing data; based on an optimization criterion, obtaining embedding characteristics of each mode, and mapping the embedding characteristics to a uniform low-dimensional embedding space; introducing an optimization constraint mechanism for feature fusion; carrying out weighted fusion on each modal embedding feature; carrying out encryption transmission and steganography optimization regulation and control on the fusion embedded features, and uploading the fusion embedded features to a cloud for cross-factory collaborative operation and maintenance; an information and data bidirectional reversible reconstruction and precision guarantee mechanism is constructed, and accurate decoding of embedded information, lossless restoration of original data and accurate traceability of faults are realized. According to the method, the response precision and deployment adaptability of fault detection and predictive maintenance in the industrial intelligent manufacturing process are improved, and the method is suitable for a complex working condition environment with extremely high requirements on model stability and processing efficiency in a manufacturing field.

The invention relates to a robust image watermark embedding method based on fixed neural network steganography, and belongs to the technical field of computers. According to the method, the problems that a traditional image watermarking technology is prone to being damaged by attacks such as compression and cutting and the fine tuning cost is high are solved, robustness is obtained by adopting a HiDDeN framework to pre-train a watermark extractor, a potential diffusion model is constructed, the decoder weight is frozen, binary watermark information is mapped into potential spatial disturbance vectors, and therefore the robustness of the image watermarking technology is improved. A learnable module is utilized to generate disturbance through an L-BFGS optimizer, a visual undifferentiated image is reconstructed through a fixed decoder, and a fixed extractor verifies the watermark. According to the method, steganography is pre-set in a generation stage, post-processing performance loss is avoided, watermark consistency, attack resistance and safety are remarkably improved in combination with a fixed network structure, and the method is suitable for digital copyright protection and content traceability.

The application discloses a high-capacity provably secure steganographic embedding and extracting method and system based on cascade sampling, and belongs to the technical field of message steganography. The method comprises the following steps: acquiring input content and a secret message, and initializing a steganographic set; inputting the input content at a time step into a generation model for inference prediction to obtain a predicted candidate word set and a probability set corresponding to the predicted candidate word set; performing recursive uniform grouping on the candidate word set in combination with the probability set, and selecting a target group according to the secret message; updating the steganographic set according to the selected target group, and generating input content according to the updated steganographic set; re-executing the step of inputting the input content at the time step into the generation model for inference prediction until the secret message is intercepted completely, and outputting a final steganographic set. The application improves the steganographic capacity and the quality of generated content while proving the security of steganography.

The invention discloses a robust steganography method and device for privacy image protection, and belongs to the technical field of information security. The method comprises the following steps: scaling a cover image to obtain a carrier image capable of bearing privacy image information; performing frequency domain transformation on the carrier image, and constructing a frequency domain embedding domain; bit plane splitting processing is carried out on the privacy image to be protected to obtain a privacy bit plane; and designing a nested quantization index modulation algorithm, and embedding the privacy bit plane into the frequency domain embedding domain to generate a secret-containing image. According to the method, complete lossless reconstruction of the privacy image can be realized in a lossless environment, and the privacy image with identifiable semantic information can be reconstructed in a lossy environment, so that the original appearance of a sensitive image is effectively prevented from being leaked in the propagation, storage and processing processes, and the security of the privacy image is improved.

The application discloses a privacy image protection-oriented robust steganography method and device, and belongs to the technical field of information security. The method comprises the following steps: scaling a cover image to obtain a carrier image capable of carrying private image information; performing frequency domain transformation on the carrier image to construct a frequency domain embedding domain; performing bit plane splitting processing on a private image to be protected to obtain private bit planes; designing a nested quantization index modulation algorithm to embed the private bit planes into the frequency domain embedding domain to generate a stego image. The method can not only realize complete lossless reconstruction of the private image in a lossless environment, but also reconstruct the private image with recognizable semantic information in a lossy environment, thereby effectively preventing sensitive images from leaking the original appearance in the process of transmission, storage and processing, and improving the security of the private image.

The invention discloses an underwater acoustic communication method, device and equipment based on ship radiation noise, and a medium, and the method comprises the steps: mapping a to-be-transmitted bit stream to a codebook sequence which is constructed and optimized based on the ship radiation noise, and generating a transmission signal consistent with the characteristics of the ship radiation noise through signal shaping processing; a receiving end realizes signal matching identification and inverse mapping recovery of an original bit stream through preprocessing, interference compensation, correlation detection and energy combination, and the identification probability of a non-destination receiver on a communication signal is remarkably reduced by means of the disguise characteristic of a ship radiation noise imitating signal. According to the method, the problem that the communication rate is limited due to the fact that a steganography method depends on camouflage signal hiding capacity is solved, the defect that a traditional spread spectrum sequence is easily observed and detected for a long time is overcome, and the requirement of modern ocean engineering for underwater acoustic communication concealment is met.

The application belongs to the technical field of video encryption transmission, and particularly relates to a video transmission method and system for multimedia video, which comprises the following steps: identity authentication of a receiving end and a sending end; a gray image and an information sequence are randomly generated by the to-be-authenticated end, the information sequence is a binary sequence, and the number of digital 0 and 1 is equal; according to the MAC address of the to-be-authenticated end, the information sequence is hidden in the gray image through a steganography algorithm to obtain an authentication image and send the authentication image to the authentication end; the authentication end extracts an authentication sequence from the received authentication image through the steganography algorithm according to the stored MAC address of the trusted terminal, and the to-be-authenticated end passes the authentication when the authentication sequence satisfies that the number of digital 0 and 1 is equal; after the receiving end and the sending end both pass the authentication, an information key is created through a DH key exchange protocol, and the information key is used for encrypted transmission of the video. The application improves the security of video encryption transmission.

Methods and systems for hiding secret messages or data in an NET are described. A system may access data specified by a user to embed within a digital asset. The system may determine a steganography scheme to use to embed the data and embed the data within the digital asset according to the steganography scheme. The system may store the digital asset embedded with the data on a decentralized storage network and receive an associated first Uniform Resource Identifier (URI). The system may create, using the first URI, a metadata of the digital asset embedded with the data. The system may store the metadata on the decentralized storage network and receive an associated second URI. The system may create a non-fungible token (NET) based on the second URI and store the NET on a blockchain. The user or other users may subsequently retrieve the digital asset from the decentralized storage network and extract the data embedded therein.

This application discloses a method and related equipment for steganography of copyright information based on arbitrary image style transfer. The method includes: acquiring a pre-set steganography network, a target image, and copyright information corresponding to the target image; the steganography network includes a feature extraction layer and an embedding layer; extracting multi-dimensional features of the target image through the feature extraction layer to obtain a target sequence of the target image; embedding the copyright information into the Y channel of the target image using the target sequence through the embedding layer of the steganography network to obtain a content image; acquiring a style transfer network and a style image; extracting the style sequence and content sequence through the style transfer network to obtain a position-encoded content sequence, forming a stylized content image. Clearly, this application can steganography of copyright information into a content image and perform arbitrary image style transfer on the content image using a style transfer network, which can reduce copyright disputes.

Provided in the embodiments of the present description is an image verification method, which is executed by a steganographic device, wherein the steganographic device comprises: a photographic module and a verification module. The image verification method comprises: a photographic module capturing a first image, and using a preset steganography algorithm to add, into the first image, first information corresponding to device parameters of a steganography device; and the photographic module sending to a verification module the first image, into which the first information has been added, such that whether the first image is photographed by the photographic module is verified on the basis of the verification of the first information.

The invention discloses a method for embedding secret information into a video, a video steganography method and a related device.According to the method, a two-dimensional array of a coding unit is constructed, original one-dimensional representation is expanded to a structured two-dimensional embedding space, the number of available candidate states of each embedding operation is remarkably increased, a foundation is laid for high-capacity embedding, and the embedding efficiency is improved. By introducing polygon division, region-based coding rather than point-based mapping is realized, and the expression capability of a prediction unit division mode is greatly improved, so that more secret information can be embedded under limited structure modification, and a replacement set of an element S is screened out through a position relationship between the element S and a coverage domain, and the prediction efficiency is improved. And determining a replacement element of the element S based on the distance and performing replacement to complete secret information embedding, so that distortion cost caused by different modification directions and structural disturbance can be simulated more accurately, the candidate replacement element is ensured to be kept within an acceptable distortion range, the minimum distortion principle can be forced to be executed, and the visual quality is effectively kept.

A block chain-based low earth orbit satellite network steganography method comprises the following steps: a sender embeds encrypted data into a data signature of a block chain transaction to construct a steganography transaction; all steganographic transactions and other common transactions in the satellite network form first mixed traffic; transmitting the first mixed flow through the satellite relay networks, and dynamically adding bait transaction during transmission between the satellite relay networks; broadcasting all transactions added with the bait transactions, and sending second mixed traffic containing the first mixed traffic and the bait transactions to satellite nodes of the whole network; and the receiver identifies the steganographic transaction through transaction filtering, decrypts the steganographic transaction and restores the original plaintext data. According to the method, the concealment and detection resistance of a communication link can be enhanced, the contradiction between satellite resource limitation and processing efficiency is solved, and efficient filtering and extraction of steganographic transactions are realized.

The application discloses a JPEG image multi-carrier steganography method based on a monkey king evolution algorithm, which is used for embedding secret information into images and comprises the following steps: processing N images according to a user input password and an error correction matrix H based on a (7, 4) Hamming code to obtain N carrier images, wherein a matrix of the i-th carrier image is H i ′, i = 1, 2,..., N; converting secret information to be embedded Secret into a binary form, and encrypting to obtain a binary sequence M = (m1, m2,..., m L L is the length of the binary sequence M; taking the minimum difference between a carrier image feature set and a stego image feature set as an objective, using a monkey king evolution algorithm to perform non-uniform dynamic allocation on the load size of each carrier image, and according to the allocation result, cutting and writing the secret information into the corresponding carrier image to obtain a stego image set. The application can solve the problem of efficient allocation of secret information among multiple carrier images, so that the stego image is least detected.

The application relates to the technical field of digital media processing, in particular to a robust steganography method and device for an image with a high quality factor and a large size, wherein the method comprises the following steps: decoding a carrier image to obtain first spatial domain pixel values of the carrier image; performing pre-scaling processing on a spatial domain image corresponding to the carrier image based on channel characteristics of a target network platform and obtaining discrete cosine transform (DCT) coefficients; embedding target secret information into the DCT coefficients to obtain initial carrier-cipher DCT coefficients, adjusting unstable coefficients of the initial carrier-cipher DCT coefficients, and obtaining final carrier-cipher DCT coefficients; transforming the final carrier-cipher DCT coefficients into a spatial domain to obtain second spatial domain pixel values, and modifying the first spatial domain pixel values according to the second spatial domain pixel values until an air domain image corresponding to the modified first spatial domain pixel values satisfies a first preset scaling condition; and compressing the air domain image corresponding to the modified first spatial domain pixel values to generate a final carrier-cipher image satisfying a preset size.

The application discloses a large model generated content tamper-resistant watermarking method based on semantic steganography, which comprises the following steps: extracting core semantics from an original text to generate a semantic fingerprint, and performing error correction coding on the semantic fingerprint to obtain a watermark bit sequence; dividing the text into multiple text blocks; through iteration, generating a semantic space geometric partition for each text block according to a secret key and the semantic history of all previously processed blocks through a pseudo-random process; and using a large language model to perform constraint rewriting on the text block, so that the semantic vector of the rewritten text block falls into the geometric partition specified by the current watermark bit, until all bits are embedded. The application realizes strong robustness against interpretation attacks by implanting the watermark into the semantic space, and based on the context-dependent mechanism of the hash chain, any tampering will cause a chain of errors, thereby locating the tampered position, and providing an effective technical means for integrity verification and copyright protection of the large model generated content.

The application discloses an LSQb steganography method based on differential steganography, which comprises the following steps: performing differential steganography on a secret image, and expanding the obtained image; converting the obtained image and a cover image into a quantum image in NEQR form, and embedding information of the secret image into a predetermined area of the cover image; transmitting the transmission image to a receiving end by using TCP / IP; extracting the least significant bit of the gray value of each pixel of the image at the receiving end, converting the extracted NEQR image into a classical form image; finding the embedded area from the obtained image, compressing the image extracted from the area into the size of the secret image, and performing accumulation processing on the obtained image to restore the secret image. The application improves the concealment of the transmission secret image, and enhances the security and integrity of information.

A data multi-protection method relates to the technical field of information security, solves the problems that a traditional encrypted image is easy to be visually identified and pointedly cracked, and a traditional steganography method is insufficient in security and steganography capacity, and comprises the following steps: reading privacy data and a carrier image, and respectively converting the privacy data and the carrier image into two-dimensional matrixes; a carrier image hash value is obtained through an SHA-256 algorithm, a one-dimensional chaotic system is constructed to generate a chaotic sequence, and three sequences are obtained through a mod function limitation range; a final encrypted image is obtained through chaotic sequence scrambling of privacy data, orthogonal moment transformation of a carrier image, data embedding and reverse transformation reconstruction in sequence and through secondary scrambling and diffusion operation. According to the scheme, the algorithm complexity is increased, and the privacy data protection security is improved.

The invention discloses a privacy protection elastic distributed solver design method and system for resisting mixed attacks in resource allocation and a storage medium, and the method comprises the steps: designing a solver in combination with steganography based on a classical distributed optimization framework for a mixed attack scene in which Byzantine attacks and eavesdropping attacks exist at the same time, and designing a privacy protection elastic distributed solver in combination with steganography; the privacy protection effect can be achieved while the Byzantine attack is resisted. Compared with a traditional resource allocation problem solver, the method has the capacity of processing hybrid attacks, and convergence errors of the algorithm are reduced. According to the method, two types of attacks can be confronted at the same time, malicious node interference is effectively inhibited through robust screening and an elastic updating mechanism, so that the system still keeps stable convergence with relatively low error in a mixed attack environment, privacy embedding with low calculation overhead is realized by introducing steganography and Hadamard transformation, and the method does not depend on heavy encryption or an MPC protocol, so that the method is simple and convenient to operate. And the real-time requirement of an intelligent power grid is met.

The invention discloses an image cleaning method based on fusion of multiple image processing technologies. The method comprises the specific steps that S1, an image file to be cleaned is input; s2, performing format recognition on the image file input in the step S1 by adopting a plurality of image format recognition modes, if the results obtained by recognition in the plurality of image format recognition modes are the same, determining that the format recognition is successful, and entering a step S3; otherwise, entering the step S5; s3, performing format cleaning on the image file according to the format type of the image file identified in the step S2 to obtain the image file after format cleaning; s4, performing content cleaning on the image file after format cleaning to obtain a cleaned image file; and S5, ending, and recording a cleaning log or an error log. According to the method, multiple image processing technologies are fused, the thought of highly depending on a steganography algorithm is broken, the image format cleaning thought is constructed, and the image cleaning effect and safety are comprehensively improved.

Aspects related to an amalgamation platform providing concealed detection of code-passing using steganography are provided. An amalgamation platform may train a scoring engine to generate suspicion scores for code snippets and an amalgamation engine to generate execution scenarios for the code snippets. The platform may embed code in base code of a network using steganography. The platform may use the steganographic code to detect transmission of a code snippet. The platform may generate a suspicion score for the code snippet. The platform may update the scoring engine based on identifying the suspicion score satisfies a threshold. The platform may generate execution scenarios for the code snippet. The platform may determine a match between an execution scenario and a malicious code scenario. The platform may identify the code snippet as malicious and update the amalgamation engine based on the match. The platform may initiate security actions based on the match.

A digital handwriting video signing method and system integrating identity, behavior, and intent authentication, belonging to the field of image and video recognition technology, simultaneously collects data on signer identity authentication, signing behavior, and intent expression during the document signing process, ensuring spatiotemporal synchronization of the three. Upon completion of the signing, the identity authentication result, signing behavior, and intent expression data are uniformly encapsulated in an indivisible digital handwriting signature data packet, which is then embedded into the handwriting signature image using steganography technology to obtain a steganographic signature image. This steganographic signature image becomes the unique, complete, and self-sufficient evidence carrier bearing the triple authentication information of identity, behavior, and intent. Without retrieving external data or video files, a closed-loop proof of identity comparison, intent expression, and behavior consistency verification can be independently completed simply by extracting the steganographic data packet from the image, significantly reducing the difficulty and cost of evidence verification and enhancing signing security.

This application relates to the field of data encryption technology, specifically a VPN dynamic layered encryption system and method for cross-border data transmission. The method includes: dividing the data stream into different layers based on information entropy; utilizing low-entropy redundant space to embed high-entropy core data via chaotic algorithms through steganography; implementing full-domain basic encryption on the hybrid carrier, and performing chaotic scrambling and differentiated iterative diffusion for the steganography area and medium-entropy area respectively; dynamically injecting fill blocks based on entropy feedback to achieve traffic uniformity shaping; and splitting and covertly distributing the deconstruction index through threshold secret sharing. This method effectively improves the concealment and security of cross-border data transmission.

The invention discloses a cross-domain steganographic text recognition and analysis method and system based on multi-adversarial domain adaptation, and belongs to the technical field of network security. The method comprises the following steps: constructing a feature extractor of double heterogeneous branches, and performing fine-grained semantic feature extraction on a real text and a text in a public data set; constructing a steganography text analyzer based on the combination of a multi-adversarial domain self-adaptive domain invariant feature extractor and a discriminator based on a full connection layer, allocating a unique domain discriminator for each class, realizing cross-domain feature alignment, and updating parameters of the feature extractor and the discriminator; for the trained steganography text analyzer, a mutual learning mechanism and a feature alignment means are further used to optimize the model; and deploying a steganography text analyzer and carrying out real-time detection. Compared with a traditional single-branch method or a method without a mutual learning mechanism, the method has the advantages that the cross-domain knowledge migration efficiency is improved, and stable recognition performance can still be maintained even in a scene with remarkable inter-domain distribution difference.

A computer-implemented method includes: continuously generating, by a server on an enterprise network, an instance of a secret message encrypting information specific to a target system on the enterprise network; embedding, using steganography, the instance of the secret message on the target system, wherein the embedding is conducted when the instance of the secret message is generated; maintaining, by the server, a database that stores contents of each instance of the secret message; scanning, by the server, the target system for the instance of the secret message embedded on the target system; in response to locating the instance of the secret message on the target system, comparing contents of the instance of the secrete message with information stored on the database; and in response to determining that the contents of the instance of the secrete message do not match the information stored on the database, generating an alert.

The invention relates to the technical field of information security, and particularly provides a steganography method and device, equipment, a medium and a product. According to the steganography method and device, target signals of carrier audio are searched based on a plurality of fixed codebook vector combinations, steganography parameters to be determined are obtained, and the target signals are random noise excitation obtained through self-encoding gain and noise processing; based on the to-be-determined steganography parameter and a first mapping relation, determining a steganography bit stream, the first mapping relation being used for representing a mapping relation between a level state of the to-be-steganography target secret information and a steganography parameter range; the steganography bit stream is a signal carrying target secret information; determining steganographic audio based on the steganographic bit stream; and sending the steganography audio to a receiving device. The value of a steganography parameter is limited at a sending end, and the steganography parameter is used as an intermediate variable in a coding process, so that embedding of secret information is realized. Therefore, the security of audio steganography can be improved.

This invention discloses a method for encrypted data transmission of virtual devices involving an integrated proprietary transmission protocol, belonging to the field of communication security management technology. The method includes: powering on the MCU and detecting the VBUS signal, determining that it is in mobile hard drive mode, the MCU instructing the bridge chip, the MCU creating a virtual partition table disk, the PC client and the MCU performing bidirectional authentication and key exchange to establish an encrypted secure channel, the encrypted file blocks sent by the PC being disguised as target read / write commands through protocol steganography, transmitted and intercepted and decrypted by the MCU, and if it is a secure transmission request, written to the memory. This method is used to solve the technical problem in the prior art that it is impossible to ensure covert and secure data transmission while satisfying transmission mode compatibility. By combining virtual devices and proprietary protocols in a dual-mode switching hardware architecture, it ensures both data transmission rate and ease of use, and achieves end-to-end encryption and steganography protection, thereby improving overall security and practicality.