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| Number | Title | Issue Date |
| 8160249 | Utilizing data reduction in steganographic and cryptographic system The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal; subtracting the reduced data signal from the data signal to produce a rema... | 04/17/2012 |
| 8085935 | Embedding and extraction of information from an embedded content using replica modulation Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined qua... | 12/27/2011 |
| 8054969 | Transmission of a digital message interspersed throughout a compressed information signal A method is disclosed that enables the transmission of a digital message along with a corresponding media information signal, such as audio or video. A telecommunications device that is processing the information signal from its user, such as a speech signal, encode... | 11/08/2011 |
| 8000474 | Client-side protection of broadcast or multicast content for non-real-time playback A system and method are disclosed for providing client-side protection of broadcast or multicast multimedia content for non-real-time playback. A set-top box function receives a request to record multimedia content and determines whether recording of the multimedia ... | 08/16/2011 |
| 7961880 | Methods and apparatuses for determining scrambling codes for signal transmission Methods and apparatuses for determining scrambling codes for minimizing co-channel interference in a communication system. A method in accordance with the present invention comprises defining at least one initial default sequence, generating a scrambling code, scram... | 06/14/2011 |
| 7796755 | Storage of digital data A device for locating a DES key value that corresponds to a packet identification (PID) contained at a variable possible location which comprises part only of a 32-bit packet header. A table stored in memory contains for each DES key: (i) a packet header having 32 b... | 09/14/2010 |
| 7778419 | Key masking for cryptographic processes Countermeasures for differential power or electromagnetic analysis attacks are provided with the definition and use of key encryption masks and masked substitution tables in a cryptographic process. Different key encryption masks and masked substitution tables are a... | 08/17/2010 |
| 7664263 | Method for combining transfer functions with predetermined key creation A method for combining transfer functions with predetermined key creation. In one embodiment, digital information, including a digital sample and format information, is protected by identifying and encoding a portion of the format information. Encoded digital inform... | 02/16/2010 |
| 7643634 | Electronic component allowing the decoding of satellite digital television signals An integrated circuit is embodied on a monolithic substrate and incorporates a tuning module of the direct sampling type that is able to receive satellite digital television analog signals composed of several channels, as well as several channel decoding digital mod... | 01/05/2010 |
| 7606366 | Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation Apparatus and methods are provided for embedding or embedding digital data into an analog host or cover signal. A distributed signal feature of the cover signal in a particular domain (time, frequency or space) is calculated and compared with a set of predefined qua... | 10/20/2009 |
| 7564973 | Digital watermark embedding device and digital watermark embedding method A digital watermark embedding device and method uses block correlation to perform motion detection on temporally sequential digital video signals after performing preprocessing such as division into blocks. The device and method evaluate a plurality of motion inform... | 07/21/2009 |
| 7460667 | Digital hidden data transport (DHDT) A system for embedding auxiliary digital information into a primary digital signal to form a composite digital signal. Auxiliary data bits modulate a pseudo-random (e.g., PN) sequence to provide an auxiliary data sequence used to modify the Least Perceptually Signif... | 12/02/2008 |
| 7418110 | Method and apparatus for compressed-domain watermarking A method and apparatus for inserting a low frequency watermark into a compressed data stream carrying compressed content is disclosed. A portion of the compressed data stream is decoded to generate decoded content. The decoded content is analyzed to generate waterma... | 08/26/2008 |
| 7403617 | System and method for copy protection for digital signals Embodiments of the present invention provide for the copy protection of distributed material after conditional access is applied, regardless of where the material is distributed. The solutions described provide the advantage of being sufficiently simple in implement... | 07/22/2008 |
| 7403622 | Process for managing a symmetric key in a communication network and devices for the implementation of this process A symmetric key management process in a communication network comprising a source device furnished with a source of data to be broadcast over the network and at least one receiver device intended to receive the broadcast data. The process comprises: determining and ... | 07/22/2008 |
| 7391866 | Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list A reception apparatus includes: a reception unit for receiving the scrambled content, the scrambled content being scrambled so that a predetermined unit of scrambled content is descrambled using a descrambling key corresponding to the predetermined unit of scrambled... | 06/24/2008 |
| 7362861 | Methods and apparatus for protecting information content Methods and apparatus for protecting copyrighted information, e.g., video signals, from unauthorized copying. Analog red (R), green (G) and blue (B) video signals are transmitted from a source device, e.g., a display adapter, to a display device, e.g., a monitor, ov... | 04/22/2008 |
| 7352864 | Display device A display device comprises a nonvolatile memory for storing an amount of adjustment obtained in a blanking adjustment most recently performed for a particular video signal, means for judging whether or not the particular video signal is inputted, means for masking a... | 04/01/2008 |
| 7340526 | Automated content source validation for streaming data One or more validation keys are embedded in a data stream at a server. A client requests the data stream from the server. The server sends the data stream to the client. The client receives the data stream, and samples the data stream to detect one or more validatio... | 03/04/2008 |
| 7325131 | Robust watermark for DSD signals A robust watermark embedded into a Direct Stream Digital (DSD) audio signal including a flat frequency response in a specific frequency range which does not extend below 20 kHz or above 100 kHz. The watermark is therefore hidden in the noise spectrum of the DSD sign... | 01/29/2008 |
| 7321666 | Multilayered digital watermarking system A digital watermarking apparatus that embeds two watermarks in host data is provided. The first watermarking block generates a plurality of watermarking location candidates of the first watermark, and embeds the first watermark into the respective location candidate... | 01/22/2008 |
| 7315621 | Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium A characteristic amount is retained and calculated from an entered video signal. Embedment intensity is retained and calculated from the retained characteristic amount. Embedment information is embedded as digital watermarks into the entered video signal in accordan... | 01/01/2008 |
| 7313755 | Media timeline sorting Media timeline sorting is described. In an implementation, a method includes receiving a media timeline at an application programming interface, in which, the media timeline includes a plurality of timeline objects. One or more of the timeline objects reference a re... | 12/25/2007 |
| 7292230 | Method of deactivating device lock state, and electronic device An electronic device comprises a touch screen and is configured to enter a lock state upon the fulfilment of a predetermined condition. The device is configured to display one or more images on the touch screen when the device is in the lock state, of which images o... | 11/06/2007 |
| 7281272 | Method and system for copyright protection of digital images A method and system for protecting digital images copied from a video RAM, including the steps of transmitting stored pixel data from a computer memory to a video RAM, identifying protected pixel data within the stored pixel data, modifying the stored pixel data, th... | 10/09/2007 |
| 7257710 | Additional-data embedding apparatus and additional-data embedding method The present invention provides an additional-watermark embedding apparatus for embedding predetermined additional data into original data. The additional-watermark embedding apparatus includes an adder for summing the original data and the additional data, a first a... | 08/14/2007 |
| 7251328 | System for secure decryption of streaming media using selective decryption of header information and decryption of reassembled content A system provides improved security in a streaming media decoder includes decryption of encoded media information at the media layer, within a decoder component of a playback device. A content source, such as an MPEG-4 media stream from a network, or a file on a loc... | 07/31/2007 |
| 7248696 | Dynamic system bus encryption using improved differential transitional encoding The present invention provides data encryption for a differential bus employing transitional coding. The present invention maps, encodes and encrypts input data as a logic status for a given bus transfer cycle. The mapping, encoding and encrypting of the input data ... | 07/24/2007 |
| 7221760 | Information security using digital holography A method and system for encrypting multi-dimensional information utilizing digital holography is presented. A phase-shifting interferometer records the phase and amplitude information generated by a three-dimensional object at a plane located in the Fresnel diffract... | 05/22/2007 |
| 7209561 | System and method for generating encryption seed values A method for generating a seed value for use in symmetric encryption includes creating and storing a first data set and generating a hashed value based on the first data set. A replacement position in the first data set is selected, and at least a portion of the has... | 04/24/2007 |
| 7181022 | Audio watermarking to convey auxiliary information, and media embodying same Methods of processing audio to convey auxiliary information therein without audible evidence of data alteration. Various arrangements are disclosed. One receives plural bit auxiliary data in which the auxiliary information is included, and modulates a carrier signal... | 02/20/2007 |
| 7151842 | Watermark embedding and extracting method and embedding hardware structure used in image compression system A watermark and extracting method and a watermark hardware structure used in an image compression system. A series of data is generated by random variables, such that duplication is avoided. According to characteristics of the human vision system, weighted value of ... | 12/19/2006 |
| 7143440 | User authentication system and method A user authentication method includes creating an authentication key in the form of a user formula, presenting a user with an arrangement of variables, each assigned a value, applying the assigned values to matching variables in the user formula and calculating a fi... | 11/28/2006 |
| 7131007 | System and method of retrieving a watermark within a signal A system and method of retrieving a watermark in a watermarked signal are disclosed. The watermarked signal comprises odd and even overlapped blocks where the watermark is contained in the even blocks. The method comprises, for each k-th even block, subtracting the ... | 10/31/2006 |
| 7123718 | Utilizing data reduction in stegnographic and cryptographic systems The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal; subtracting the reduced data signal from the data signal to produce a rema... | 10/17/2006 |
| 7103184 | System and method for sign mask encryption and decryption In general, one embodiment of the invention involves a method to protect the integrity of the sign mask. The method involves computing a key shared by a plurality of software modules employed within an image display device and encrypting a sign mask with the shared ... | 09/05/2006 |
| 7086087 | Information processing device, card device and information processing system It is a technological object of the present invention to provide an information processing device, a card and a card system that have a high level of security. In order to achieve the object described above, the present invention provides a data processing apparatus... | 08/01/2006 |
| 7065212 | Data hiding in communication Signature information, representing important content of the data, is extracted from a first data block and then embedded in a different block. Data hiding techniques are used to minimize perception of the hidden data. Thereafter, if the first data block is lost or ... | 06/20/2006 |
| 7055034 | Method and apparatus for robust embedded data This invention describes a method and apparatus for the increasing the robustness of embedded data. Since many times embedded data is susceptible to removal by an unauthorized person, one preferred embodiment enables an action such that removal of the embedded data ... | 05/30/2006 |
| 7043020 | Smartcard for use with a receiver of encrypted broadcast signals, and receiver A smartcard for use with a receiver of encrypted broadcast signals comprises a microprocessor for enabling or controlling decryption of said signals. A memory is coupled to the microprocessor. The microprocessor is adapted to enable or control the individual decrypt... | 05/09/2006 |
