1072 results about "Information hiding" patented technology

The invention relates to a privacy-information hiding method and device, and belongs to the field of image processing. The privacy-information hiding method comprises the following steps of identifying at least one piece of privacy information in an image, analyzing the information type of each piece of privacy information, and hiding the privacy information in the image according to the information types. According to the privacy-information hiding method and device, the problem that privacy-information processing cannot be carried out on images of which not all character information is privacy information needing to be hidden in related technologies is solved; according to the information types of the privacy information, the privacy information is hidden in different processing modes.

An electronic design automation tool may receive information related to electronic design automation that contains secured information, such as physically secured information, and annotations to indicate the secured portions of the information. Upon receiving such information, the electronic design automation tool may identify those portions of the information comprising secured information related to electronic design automation, and unlock the secured information for processing. The electronic design automation tool may process at least some of the secured electronic design automation information without revealing that secured information to unauthorized persons, tools, systems, or otherwise compromising the protection of that secured information. That is, the design automation tool may process the secured electronic design automation information so that the secured information is concealed both while it is being processed and by the output information generated from processing the secured information.

The invention discloses an H.264/AVC video information hiding method based on a predictive mode. For a macro block whose coding mode is Intra_4*4 in an I chip, a predictive mode of a 4*4 luma block is modulated to a suboptimal predictive mode from an optimal predictive mode under the circumstance that the predictive mode of the 4*4 luma block needs to be changed, and for macro blocks whose coding modes are marked not by 0 in a P chip and a B chip, a coding mode of a macro block is modulated to a suboptimal predictive mode from an optimal predictive mode under the circumstance that the predictive mode of the macro block needs to be changed; the impact on the objective quality of a video, caused by the change of the predictive mode or the coding mode, can be reduced as much as possible under the circumstance of ensuring that the secret information can be effectively hidden at the same time; on the other hand, due to the fact that the secret information not only can be embedded in the macro block whose coding mode is Intra_4*4 in the I chip but also can be embedded in the macro blocks whose coding modes are marked not by 0 in the P chip and the B chip, the higher hiding capacity can be obtained.

The invention discloses an information hiding method taking text information as a carrier, which is used for providing a hiding channel to secret information in the process of data transmission. The method comprises the following steps: self-defining a reserved code set according to a character coding standard characteristic; self-defining an L scale code according to a base number L of the reserved code set; self-defining a bijective function f of the L scale code to the reserved code set and a reverse function f<-1> thereof; self-defining a method of embedding reserved code character stringsin text information; embedding the secret information to a carrier of the text information and obtaining a secret object; and extracting the secret information from the secret object. The informationhiding technology takes the text information as the carrier and has strong versatility, large hiding capacity, good transparence and strong safety.

This invention relates generally to document protection methods and product. More specifically, the present invention relates to a method for hiding information in a document by means of a latent image or message, which is practically invisible to the naked eye and may only be revealed through use of a matching viewing device. The present invention further relates to a method for creating original documents containing latent messages, which are revealed when the document is read by a viewing device. In one embodiment, print elements such as lines, dots, spots, swirls, or images are used to form covert information. The covert information print elements are disposed at an angle to print elements of a background, thus creating a covert document. In another embodiment, print elements of the covert information are used with a solid background.

The invention relates to a high capacity information hiding method using JPEG2000 compressing images as the carrier. The operation steps are: applying wavelet decomposition, wavelet coefficients quantification and bit-plane coding to images, and determining the truncation position of the code flow of all coding blocks and the lowest bit-plane of the embeddable information by rate-distortion optimization; primarily choosing a wavelet coefficient which is more than the threshold value as the embedding point, and making a redundancy estimation and adjusting the embedding point and the embedding strength; embedding the synchronous information and the hidden information into the quantified wavelet coefficient in an order of the bit plane from the lowest to the highest starting from the lowest embeddable bit-plane; making a second bit-plane coding and organizing the code flow after embedding the information. The high capacity information hiding method is based on a second coding strategy to determine the embedding position and improves the information hiding volume by self-adaptively choosing the embedding point and adjusting the embedding strength, The high capacity information hiding method has the advantages of being transparent completely for the standard JPEG2000 decoders and being able to be conveniently integrated in the JPEG2000 coders. Meanwhile, the code flow still can decode normally after being embedded with hiding information.

The invention relates to a speech information hiding secret communication system which organically integrates techniques, such as information hiding, passwords, communication, and the like. In the invention, MELP2.4KBps secret speech is hidden in the public speech of G.721, G.728, GSM and G.729 of a code-excited linear prediction code by connecting a public telephone network PSTN, mobile communication GSM/CDMA, videoconferences and a VoIP network and utilizing a speech information hiding and extraction algorithm, and a private channel is established in a public communication channel to carry out the real-time secret communication of secret speech information. The system adopts an embedded type technique based on DSP, and designs corresponding functional modules, such as speech coding and decoding, speech encryption and decryption, speech information hiding and extraction, and the like. Under the condition that a certain communication rate and a certain speech quality are ensured, secret speech real-time communication is carried out on various public channels, and the communication quality reaches the requirement of a communication standard.

The invention discloses a method for hiding high-capacity compression-resisting image information. According to the method, firstly, a carrier image is sampled and is decomposed to acquire sub-images which are same in size and do not mutually overlap; secondly, several sub-images are preferentially selected from the sub-images and serve as carrier sub-images, and the rest of the sub-images serve as source images used for carrier recovery. Firstly, encoding and scrambling are conducted on embedded information; secondly, one or more digits among four high digits in the carrier sub-images are hidden with a foundational hiding method, and sub-images which contain secret information and sub-images which do not contain secrete information are reconstructed to form an image which contains secret information to be transmitted; received images are decomposed by a receiving end, the secret information is extracted from the sub-images which contain the secret information, and the sub-images which do not contain the secret information are predicted in an interpolation mode to recover carrier images. The method has the advantages of being large in hiding capacity, strong in compression-resisting capability and low in complexity, can recover the secret information and the carrier images in a high-quality mode under the condition of achieving two-time compression to eight-time compression of a JPEG2000 algorithm, wherein the maximum relative hiding capacity can reach one eighth and the typical value of the PSNR of carrier image recovery is 40dB.

The invention discloses a voice secret communication system design method based on compressive sensing and information hiding, comprising the following steps: embedding secret voice into carrier voice by an embedded system to obtain mixed voice; designing a compressive sensing overcomplete dictionary aiming at the voice signal; sampling the secret voice by a compressive sensing self-adaption observation matrix to obtain a observation vector for reducing dimensions; quantizing the observation vector by an LBG (Linde-Buzo-Gray algorithm) vector, taking the quantized observation vector to serve as secret information to embed into the carrier voice, and carrying out two-stage transform on the carrier voice to obtain mixed voice; extracting the secret voice from the mixed voice by an extraction system; carrying out discrete cosine transform on mixed voice, and improving wavelet transform two-stage transform to obtain a wavelet transform coefficient; obtaining a secret bit stream by a scalar Costa decoding algorithm; obtaining a reconstructing observation vector by an LBG vector quantization decoder; reconstructing the secret voice by a compressive sensing orthogonal matching pursuit algorithm; and improving the quality of the reconstructed secret voice with a wavelet denoising method.

The invention belongs to the field of video privacy protection technology and discloses a privacy protection method based on monitoring video multi-target tracking and face recognition. The method comprises the steps that a background model is established and updated according to a real-time monitoring video, and the new background model is adopted to divide a foreground target region; pedestrian detection and face recognition are performed based on the foreground target region, and continuous tracking and identity recognition of community internal personnel and community foreign personnel in a community monitoring video are realized through combination of a Kalman filtering technology and a Hungary algorithm; and video information of the community internal personnel is protected by means of information hiding. According to the method, privacy information of users in a community is protected through face recognition and target tracking technologies, foreign strangers are also monitored, and balance is achieved between maintenance of community safety and protection of user privacy; and the video information of specific users is subjected to privacy protection in combination with target detection, target recognition and multi-target tracking technologies while monitoring system availability is guaranteed.

The invention provides a big data image protection method based on a security area, and the method comprises the steps: S1, selecting a target security area through employing a target detection method, and extracting color image features; s2, a big data technology is adopted, a big data picture set is utilized to train a network model and a test network model, an application algorithm of a deep learning model in target detection is applied, and an object area is extracted to serve as a safety area of information protection; and S3, taking the extracted security area as a steganography area ofthe encrypted image, and carrying out secret information hiding by applying a steganography algorithm. According to the invention, the application algorithm of the deep learning model is applied in the target detection, that is, the Mask R-CNN instance segmentation method, and select the region with complex texture noise in the image, an area with complex texture noise in the image, namely a foreground part, is selected, secret information is accurately hidden in a foreground object, and therefore the purpose of more secret image secret information hiding protection is achieved.

The invention relates to a JPEG image information hiding based private information communication method and system. The system comprises a preprocessing module used for converting to-be-transmitted information into binary data, an encryption/decryption module used for generating an information hiding key by a password input by a user, an information hiding module used for embedding the converted binary data into a carrier JPEG image, a transmission module for transmitting and sharing the JPEG image embedded with the binary data information, and an information extraction module used for extracting the binary data in the image embedded with the binary data information, wherein the information hiding module comprises an entropy decoding module, an information embedding module and an entropy encryption module. The invention provides a complete multi-morphological information hiding core algorithm taking an image as a medium and a communication solution. The private information communication method and system have important theoretical and application values.

The invention discloses an information hiding method facing to an H.264/AVC (automatic volume control) video. The embedding of watermark information is realized through modifying a data communication terminal (DCT) coefficient of a frame I, but for a frame B and a frame P, the embedding of the hiding information is realized through modifying motion vector data (MVD), thus on one hand, the embedded watermark information can be used for authenticating the integrity of the content of the video streaming, and on the other hand, whether the video is attacked is judged, and whether the extracted information is credible and the like at an information detection end according to the integrity of the extracted watermark information, thus ensuring the safety of the private information; as the frame P and frame B in a video sequence are divided into a motion subblocks from the size range of 16*16 to 4*4; the smaller subblock division provides a large amount of MVD data which can provide for hiding the private information, thus the video has larger information hiding capacity; and the process extracting the information is simple and rapid, does not need an original video file for reference, and only needs to decode the DCT coefficient of the frame I and the MVD data of the frame B and frame P, thereby effectively improving the instantaneity and the practicability.

The invented method includes the following steps: firstly, collecting fingerprint image, making characteristics extraction, encryption processing, printing it on the two-dimensional bar code, concealing the fingerprint information into two-dimensional bar code; collecting two-dimensional bar code image, making image segmentation, filtering, geometric correction and layered pretreatment, identifying and decoding said bar code image to obtain the loaded encrypted information, deciphering said encrypted information to obtain fingerprint characteristic information loaded in two-dimensional bar code, comparing said information with field fingerprint information, making detection so as to implement anti-false authentication of fingerprint.

The invention discloses a graph convolutional network gradient-based node information hiding method. The method comprises the steps of (1) constructing a network graph, constructing an adjacent matrixaccording to a connected edge set corresponding to the network graph, and preprocessing the adjacent matrix; (2) constructing and training a graph convolutional network model, and determining final weight information of the graph convolutional network model; (3) according to the final weight information, building an objective function based on a goal of ensuring non-target node classification tobe accurate as far as possible and enabling target node classification to be wrong, and calculating a connected edge gradient matrix corresponding to the adjacent matrix by utilizing the objective function; (4) according to a set gradient threshold, symbolizing the connected edge gradient matrix to obtain a connected edge gradient symbol matrix; and (5) updating the adjacent matrix by utilizing the connected edge gradient symbol matrix to hide node information. According to the method, the target node information of a network can be hidden under the condition of slightly changing the structureof the network as far as possible.

The invention discloses a method for hiding the information of a JPEG (Joint Photographic Experts Group) digital image based on a modified quantization table, in particular to an improved quantization table 16*16 by changing the method of a traditional quantization table 8*8 in the JPEG standard and embedding 2 bits of information at the 2-LSBs (Least Significant Bit) of each low and medium frequency coefficients in the DCT domain after carrying out DCT (Discrete Cosine Transform) and quantization to the carrier image. On the basis of favorable robustness and invisibility, the method modifies the quantization table so as to fully extract secrete information to be hidden, greatly improve the capacity of the steganographic method in comparison with a traditional Jsteg method and obatin higher hidden image quality.

The invention discloses a method for hiding car owner information and contacting car owners, and relates to a communication method. The method aims to solve the problem that phone numbers of the car owners are prone to leakage in the prior art. According to the technical scheme, the method includes the steps that (S10) the car owner information input by users is obtained, wherein the car owner information includes the phone numbers of the car owners; (S20) the car owner information is coded in a preset coding mode to obtain car owner codes corresponding to the car owner information, and the car owner codes are stored in a preset database; (S30) the phone numbers having access to a preset server in a unified mode are obtained; (S40) corresponding two-dimensional codes are generated according to the phone numbers having access to the server in the unified mode and the car owner codes.

Disclosed are “black-box leases” that protect information consistency and that allow for information sharing in a distributed file system while hiding from a client information about other clients' use of the file system. This information hiding also allows greater concurrency because changes to the file system are permitted as long as they do not affect the leases as observed by the clients. For each data field protected by a black-box lease, a client has a two-value data structure: SelfValue represents the client's intended use of the data field, and OtherValue is an aggregation of the other clients' intended uses of that data field. Knowing only this aggregate OtherValue, but without knowing any specifics of the other clients' usage patterns, the client knows how it may use the data field without adversely affecting the consistency of data in the distributed file system.

A method of utilizing halftone to hide and to pick up alphaphotographic information includes hiding alphaphotographic information effectively in printed manuscript at printing process and simultaneously enabling to use printing film prepared by present invention to easily pick up false proof information hidden in said printed manuscript.

The invention discloses a transmitting/receiving method of covert communication. The method conceals important information waiting convey into a carrier in computer network environment, and important information is unware. When a transmitter transmits network date, a secret information is random embedded into a check field of network protocol date unit (TCP section or UDP) header, and date field is corrected for ensuring check sum right after the secret information is embedded; a receiver extracts the secret information after receiving network protocol date unit from network. The method has better confidentiality and anti-attack by using check and covert information of protocol date unit, and is safely and reliable. The method is especially suitable for convert communication of important information with less date quantity.

The invention provides a histogram feature based image encryption domain reversible information hiding method, and belongs to the field of digital image encryption and information hiding. The histogram feature based image encryption domain reversible information hiding method comprises the steps that an image owner generates a ciphertext image through carrying out image pixel position scrambling encryption and pixel value encryption, then sends an encryption key and the sub-block size of the ciphertext image to an image receiver, and sends the ciphertext image and the sub-block size thereof to an information hider at the same time; the information hider randomly selects block information embedded information, generates a ciphertext image carrying information, then sends an embedded key, the information containing ciphertext image and the sub-block size to an information receiver, and sends the information containing ciphertext image to the image receiver; the information receiver extracts information according to the embedded key; and the image receiver decrypts and recovers the image according to the encryption key. The method provided by the invention has the beneficial effects that the algorithm is simple and effective, the information can be completely extracted, and the original image can be completely recovered; and the information extracting process, the image decrypting process and the image recovering process are completely independent.

The invention is applicable to the field of display terminals and provides a method for displaying window information, a system and a display terminal thereof. The method comprises the following stepsof dividing a window into a main region and at least one abbreviative region, developing and displaying the information in the main region, and hiding the information outside the main region in the abbreviative region; when the information in the main region is slipped to be a hiding state from a display state, obtaining the slip direction of the information in the main region; and hiding the information in the main region in the abbreviative region according to the slip direction. The invention realizes the quick view of the information at the bottom or top or other positions of the window by synchronously developing and displaying, and hiding and displaying the information in the window. The interface display is visual and vivid, user operation is simple, easy and convenient, and the invention has good operation experience.