393 results about "Steganography" patented technology

Documents and other items can be delivered electronically from sender to recipient with a level of trustedness approaching or exceeding that provided by a personal document courier. A trusted electronic go-between can validate, witness and/or archive transactions while, in some cases, actively participating in or directing the transaction. Printed or imaged documents can be marked using handwritten signature images, seal images, electronic fingerprinting, watermarking, and/or steganography. Electronic commercial transactions and transmissions take place in a reliable, "trusted" virtual distribution environment that provides significant efficiency and cost savings benefits to users in addition to providing an extremely high degree of confidence and trustedness. The systems and techniques have many uses including but not limited to secure document delivery, execution of legal documents, and electronic data interchange (EDI).

The present invention provides steganographic-embedding techniques. In one implementation a digital watermark signal is mapped to a set of spatial positions. Physical message objects are positioned according to the set of spatial positions. The signal is provided on a physical structure such as a building or road. The signal may include geo-location information. The geo-location information identifies the location of the physical structure. In other cases the signal includes a marker or identifier. The marker or identifier provides a reference point for images depicting the physical structure.

Documents and other items can be delivered electronically from sender to recipient with a level of trustedness approaching or exceeding that provided by a personal document courier. A trusted electronic go-between can validate, witness and/or archive transactions while, in some cases, actively participating in or directing the transaction. Printed or imaged documents can be marked using handwritten signature images, seal images, electronic fingerprinting, watermarking, and/or steganography. Electronic commercial transactions and transmissions take place in a reliable, “trusted” virtual distribution environment that provides significant efficiency and cost savings benefits to users in addition to providing an extremely high degree of confidence and trustedness. The systems and techniques have many uses including but not limited to secure document delivery, execution of legal documents, and electronic data interchange (EDI).

Documents and other items can be delivered electronically from sender to recipient with a level of trustedness approaching or exceeding that provided by a personal document courier. A trusted electronic go-between can validate, witness and/or archive transactions while, in some cases, actively participating in or directing the transaction. Printed or imaged documents can be marked using handwritten signature images, seal images, electronic fingerprinting, watermarking, and/or steganography. Electronic commercial transactions and transmissions take place in a reliable, “trusted” virtual distribution environment that provides significant efficiency and cost savings benefits to users in addition to providing an extremely high degree of confidence and trustedness. The systems and techniques have many uses including but not limited to secure document delivery, execution of legal documents, and electronic data interchange (EDI).

The present invention relates generally to digital watermarking and steganography. In one implementation, a method includes receiving permuted or encrypted data generated at a remote computing device, wherein the received data is encrypted or permuted according to a key carried by a digital watermark embedded in a security document; determining whether the received data matches or corresponds to data stored in a data repository, where the data repository indexes data stored therein without associating indexed data to a particular person or to an issued security document; and communicating an authentication indication to the remote computing device in accordance with a result of the act of determining.

Steganographic techniques are used to embed financial information or authentication information within an image, audio, or video file using a quantization table and/or other filter. The file is then transmitted over an insecure network, such as a GSM cell phone network, and a server extracts the information from the image, audio, or video using the same quantization table and/or filter. Multiple sets of information, such as telephone numbers and/or payment account numbers, are extracted from the same image by those entities possessing the appropriate keys. The filters and tables used to embed financial information can be updated periodically or according to events. A video of images, some with embedded information, some with ‘dummy’ data, can be used to hide information over insecure networks for payment transactions.

The present invention relates generally to steganography, digital watermarking and data hiding. In one embodiment a method is provided including: processing data representing content; analyzing the data to determine whether a plural-bit identifier is steganographically encoded therein, the plural-bit identifier encoded in the data through modifications to the data, the modifications steganographically hiding the presence of the plural-bit identifier; and upon detection of the plural-bit identifier, redundantly carrying out an action while attempting to conceal the action from one or more users of the content. Of course, other embodiments are described and claimed as well.

Data are embedded in an audio signal for watermarking, steganography, or other purposes. The audio signal is divided into time frames. In each time frame, the relative phases of one or more frequency bands are shifted to represent the data to be embedded. In one embodiment, two frequency bands are selected according to a pseudo-random sequence, and their relative phase is shifted. In another embodiment, the phases of one or more overtones relative to the fundamental tone are quantized.

Wireless devices and methods employ steganography to convey auxiliary data in addition to audio information. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. The steganographically-encoded auxiliary data can be sent to, and/or sent from, such a device, and used for purposes including authentication, system administration, etc.

For purposes of patent searching the following description involves an enhanced system that has an e-mail client, policy module, a clear signer and a steganographer. A removable device includes a public key, a private key, and a policy portion. The policy module requires the policy portion for operation such as in decrypting e-mails. The e-mail client encrypts using the private key in conjunction with clear signing with the public key and/or using steganography to mask e-mails. Other validation features are described that can be used before decryption of e-mails occurs.

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.

Wireless devices and methods employ steganography for a variety of purposes. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. In such application, steganographic techniques can be employed to encode, or decode, signals processed by the phone. Some embodiments use an image sensor to capture watermarked image data. The phone can respond to detection of such marked imagery by overlaying distinctive graphics on a cell phone display screen. Such graphics may be positioned within the display, and affine-warped, in registered relationship with the position of the watermarked object, and its affine distortion, as depicted in the image data.

The invention discloses a novel terminal safety soft secret key management method. According to the method, information of two transaction parties are selected by a soft secret key system as identification ID, public and private key pairs are formed through mapping on the basis of business subdomain identification; for online payment, a two-dimensional code is generated at a receiving party; after the two-dimensional code is scanned by a payment party, signature is carried out by utilizing a private key pair randomized number, and information is sent to a background management system; signature verification is realized by the background management system through utilizing public key pair signature information; if signature verification succeeds, transaction is processed; for offline payment, signature is carried out by the receiving party through utilizing the private key pair randomized number, and a two-dimensional code is generated; the two-dimensional code is scanned by the payment party, and signature verification is realized through public key pair signature information; if signature verification succeeds, payment is carried out by the payment party according to transaction information; signature is carried out by the payment party through utilizing the private key pair randomized number, a two-dimensional code is generated; the two-dimensional code is scanned by the receiving party, and signature verification is realized through public key pair signature information; if signature verification succeeds, payment is successfully realized for the receiving party. Through the method, system safety is not only improved, system disposition cost is further reduced, transaction validness is fully guaranteed, and invalid information tampering and information steganography can be avoided.

The disclosure relates to a method and a device for authenticating a client mobile terminal on a remote server of said terminal, with said server sending a challenge to said mobile terminal in advance, said mobile terminal having to respond to the challenge, to authenticate at the same time, by transmitting a response consisting in encoding said challenge combined with a secret key known to said terminal and the same time to the server, wherein the secret key is hidden in a media file recorded in the mobile terminal using steganography.

THE present invention relates to steganography and digital watermarking. In one implementation, we provide a method to analyze a digital image to determine whether the digital image will be a suitable host to receive steganographic encoding or digital watermarking. Suitability is determined, at least in part, by analyzing the digital image relative to an expected workflow process through which a watermarked version of the digital image is expected to flow through. Our methods and systems determine whether the digital image forms a suitable host to receive digital watermarking relative to the expected workflow process. If the digital image is not suitable, the digital image is modified to better receive digital watermarking in anticipation of the expected workflow process.

The invention belongs to an information steganography method by taking compressed video as a carrier in the field of communication and information security. The method is characterized by using VLC encoding list in ISO/IEC 13818-2 standard in the realization process to preconstruct a group of increase/decrease pair value tree AST, selecting a certain leaf node of AST in information steganography to automatically guide the operation of an embedding method, thus the size of a compressed video file does not change remarkably before and after information embedding, and the transparency of a video steganography method is ensured. The information embedding and extraction operations of the method are performed completely in VLC domain, thereby avoiding decoding and recoding processes aiming at compressed video stream and meeting the real-time requirement of the video steganography method.