19results about "Secret communication" patented technology

An interactive communication apparatus, which connects to a computer, comprises an interactive communication device, having a tag, that is removably placed on or adjacent to an interactive communication device holder, having a sensor, wherein the tag communicates information to the sensor. The interactive communication system enables a user to transfer, store or retrieve information about and / or to a person that is identified with that interactive communication device. Once the interactive communication device is placed on or adjacent to the interactive communication device holder, certain communication applications, which include, photo slideshow, chat, e-mails, music, videos, and RSS feed, launch. The user can terminate the applications by removing the interactive communication device from the interactive communication device holder. The user can access content related to a new person by placing another interactive communication device, that corresponds to the new person, on or adjacent to the interactive communication device holder.

The application discloses a kind of multi-dimensional joint spacecraft covert control systems and evaluation methods, belong to satellite covert control technical field, including ground control station and spacecraft control terminal;Ground station antenna is connected with demodulation receiving unit one, demodulation receiving unit one is connected with control service function unit one, control service function unit one is connected with inter-station link unit, service flow selection unit one and internal and external perception unit one respectively, service flow selection unit one is connected with modulation transmitting unit one, modulation transmitting unit includes radio frequency transmitting module one etc..The application improves the robustness of covert control under complex confrontation environment, while ensuring system performance, with strong adaptability, high reliability and other advantages, improve the covert performance of control system in complex environment.

The application provides a kind of multiplex data bus information security transmission method and system, it is related to information security technical field, method includes: in multiplex data bus deployment trusted noise node;Read the transmission characteristic vector of information transmission request, input generation twin network and carry out analysis, obtain twin transmission characteristic vector, generation twin network includes predefined similarity term and corresponding preset similarity threshold value;Send to trusted noise node for processing, obtain twin noise signal and noise transmission protocol, when executing information transmission request, twin noise signal is interfered with based on noise transmission protocol and safely transmitted.The application solves the technical problem that the multiplex data bus in the prior art usually uses static protection mechanism, the protection means is single, it is difficult to deal with complex attack, leading to insufficient information transmission security.

We provide the system. [Solution] Means for generating a message, A means of automatically adding recipient accounts, including public institutions, to the aforementioned message, When sending the aforementioned message, means for saving the content of the message to cloud storage in an unmodifiable form, Means for recording the transmission and reception history of the aforementioned messages with a timestamp added, A means of verifying the recipient's identity, A system that includes means for transmitting and recording the recognition status after identity verification to a server.

We provide the system. [Solution] Means for creating digital information using communication devices, A means of authenticating the user's identity, A means for transmitting digital information, after user authentication has been completed, to identified receiving and supervisory authorities, A means for storing digital information in a cloud computing environment and for applying time stamps and electronic signatures, A means for recording the information confirmed when a receiving institution receives digital information, In electronic transactions, a means to automatically generate transaction records and store them in cloud storage as legal evidence, A system that includes this.

Wireless audio systems and methods for wirelessly communicating audio information are provided. The wireless audio system includes a first wireless transceiver and a second wireless transceiver. The first wireless transceiver includes a first communication module, a first codec, and a second communication module. The first communication module is configured to receive, from an audio source, first audio information. The first codec includes a first decoder configured to obtain second audio information by decoding the first audio information, and a first encoder configured to obtain third audio information by encoding the second audio information. The second communication module is configured to send the third audio information out. The second wireless transceiver includes a third communication module configured to receive the third audio information from the first wireless transceiver.

Described herein are processes and techniques to identify encrypted content within a field of view of a user of a VR / AR system and to appropriately handle the encrypted content. A user of a VR / AR technology can have protected content within the user's field of view. Encrypted content is mapped to one or more protected surfaces on a display device. Content mapped to a protected surface can be rendered on the display device, but is prevented from being copied from the display device.

Low-complexity amplitude and phase (AM-PM) error correction in a transceiver circuit is provided. In embodiments disclosed herein, a transceiver circuit is configured to equalize an input vector to thereby correct an AM-AM error across a modulation bandwidth of the wireless communication circuit. Unlike conventional methods where complicated memory digital predistortion (mDPD) coefficients must be defined and calibrated for each modulation frequency within the modulation bandwidth, the transceiver circuit is configured herein to eliminate modulation frequency dependency of the AM-AM error. As a result, it is possible to correct the AM-AM error across the modulation bandwidth with reduced complexity to thereby improve efficiency and linearity of the wireless communication circuit.

This invention discloses a robust resource allocation method, system, terminal, and storage medium based on a sensor-integrated design. The method includes: acquiring a sensing echo signal and a communication signal, and generating a first time slot signal based on the sensing echo signal and the communication signal; amplifying the first time slot signal to obtain a second time slot signal; determining initial variables based on the second time slot signal, and performing alternating optimization processing on the initial variables to obtain a nominal optimal solution; calculating an uncertainty vector based on the nominal optimal solution to obtain a channel uncertainty vector, and determining a preset robustness constraint; if the channel uncertainty vector satisfies the preset robustness constraint, then generating a communication resource allocation result. This invention, by employing a sensor-integrated system design scheme combining robust optimization technology, can ensure the reliability and performance of the communication system under environments with incomplete or inaccurate channel information.

This invention proposes a secure power allocation and relay selection method for a cognitive Internet of Things (IoT) with the possibility of unknown eavesdropping. The method includes establishing an IoT-based cognitive relay network comprising an IoT secondary transmitter (IoT-ST), an IoT secondary receiver (IoT-SD), a primary user (PU), an eavesdropper (Eve), and N+1 alternative relays (IoT-R). The transmission process is divided into two phases: In the first phase, the IoT-ST transmits confidential signals to all alternative relays via a local connection; in the second phase, power allocation and optimal relay selection are performed. The selected relay forwards confidential information to the IoT secondary receiver (IoT-SD), while the other N alternative relays act as friendly jammers, emitting artificial noise to deliberately confuse Eve. This invention can minimize the probability of security breaches even without prior information about Eve.

The invention relates to a system (1) for imaging electromagnetic leaks in a Faraday-shielded structure (2), the system (1) comprising an electromagnetic wave receiver (7) and an electromagnetic wave source (3) comprising at least one transmitting antenna (4), a pseudo-random noise generator (51), a frequency modulator and a transmission-signal processing circuit which are configured so that the at least one transmitting antenna (4) transmits a pseudo-random noise sequence transposed onto a set of predetermined carrier frequencies, the pseudo-random noise sequence being known to the electromagnetic wave receiver (7), the electromagnetic wave receiver (7) comprising an array of N receiving broadband antennas (8) and a reception-signal processing circuit (10) connected to the receiving antenna array (8) and configured to construct an image from the correlated demodulated signals identifying the position of electromagnetic leaks in the Faraday-shielded structure (2).

This security system is used in a system in which communication between a first communication unit and a second communication unit is connected by means of a communication line. The security system includes: a signal modification unit that modifies the signal waveform of a communication signal to be transmitted in communication; and a signal correction unit that corrects the signal waveform modified by the signal modification unit.

There is provided a method (1000) for reliable communications, performed by a first communication device (100; 700) The method comprises obtaining (1100) at least one indication related to at least one modulation scheme. The at least one modulation scheme comprises a first set of constellation points and a second set of constellation points. The second set of constellation points being a subset of the first set of constellation points having a fewer number of constellation points. Amplitude spectrum of the second set of constellation points at least partially overlaps amplitude spectrum of the first set of constellations points. Further, the method comprises transmitting (1300), to a second communication device (300; 800), at least one indication related to at least one symbol. The at least one symbol is based on a modulation scheme determined within the at least one modulation scheme, and on data to be transmitted.

Aspects of the present disclosure describe scrambling of information for wireless communications to prevent deciphering or altering by unintended recipients. An example method may include generating, by a first device, a scrambling key based on at least one of a freshness parameter or a private key. The private key is known by the first device and a second device. The method also includes scrambling a payload based on the scrambling key at a physical layer. A packet includes the payload for wireless transmission from the first device to the second device via a shared channel.

Provide a system. 【Solution means】 Means for storing user authentication information in a storage element; Means for automatically accessing a specified application program using the user authentication information; Means for synchronizing user information stored in another device after the access; Means for querying an external information source when the authentication information is unknown; Means for updating authentication information based on the query result; Means for integrally managing digital terminal data of residents; Means for automatically synchronizing personal settings and service information to a new terminal; A system including the above.

The application discloses a rate division multiple access security method combining antenna selection and digital network coding. In a first time slot, a source user divides a signal into a public stream and a private stream and sends a multiple access signal to a relay. The relay selects an optimal antenna to send artificial noise according to instantaneous channel state information between the relay and trusted users, and selects an optimal antenna to receive a signal sent by the source user according to instantaneous channel state information between the source user and the remaining antennas of the relay. In addition, the trusted users generate artificial noise to interfere with untrusted users. In a second time slot, the relay uses network coding to combine signals of the trusted users whose signals are successfully decoded in the first time slot and artificial noise generated by the relay, and then combines the signals with signals of the untrusted users to form a new multiple access signal and forwards the new multiple access signal. The application combines antenna selection and digital network coding, thereby ensuring security of communication between the source user and the trusted users and improving transmission reliability between the source user and the untrusted users.

We provide the system. [Solution] A means for receiving user identification information and determining the procedure corresponding to the selected unsubscribe service, Based on the said procedure, a means to automatically select and execute the appropriate procedure from among several unsubscribe procedures, A means of notifying the user of the execution results, A system that includes this.

This security system is used in a system in which communication between a first communication unit and a second communication unit is established by a communication line. The security system comprises: a signal superposition circuit that superposes a signal having prescribed frequency characteristics with respect to a communication line; and a filter unit that is provided on a transmission line path from a position at which the signal is superposed by the signal superposition circuit to where the second communication unit receives a communication signal transmitted by the first communication unit, and filters a superposition signal that is the signal that has been superposed.

Examples described herein relate to a network interface device that includes first circuitry to perform a first scrambling operation on input data; second circuitry to perform a second scrambling operation on the input data; and third circuitry to select the second scrambled input data based on the first scrambled input data including a data sequence that is associated with receiver malfunction and the second scrambled input data including the data sequence that is associated with receiver malfunction.