328results about "Secret communication" patented technology

A secure digital network environment is provided by integrating OTP keys as part of quantum-safe data systems solutions (QPN Solutions), including the use of one-time-pad (OTP) keys to encrypt data, support multi-factor authentication and secure all communications between devices in the secure digital network environment. The OTP keys are “pre-loaded” to endpoint (EP) devices to render them quantum-safe (QS) when connected into the secure digital network environment, or are otherwise provided through removable media to be loaded into user supplied appliances, devices and accessories to render them QS when connected into the secure digital network environment. The application of QPN Solutions refers to the application of QPN enabled technologies to provide a secure digital network environment includes risk assessment and management solutions for establishing and managing cyber security insurable risks and policies.

Techniques for enhancing a security level of a communication message m, wherein the sending unit is configured to send the message m to a receiving unit over a communication path T; wherein a PLS-component of the sending unit (110, 130) adds artificial noise of a level NArt to the message m (215) to transform it to a communication signal x (40), in particular wherein the level NArt is designed to make the message m unreadable for an eavesdropper (90, 140) that has a worse signal-to-noise ratio than a legitimate receiving unit (110, 130), characterized in that the sending unit is configured to send the communication signal x (40) as a laser signal x (40).

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may modify, based at least in part on a secrecy key, an input or an output of at least one of binary scrambling, modulation, or orthogonal frequency division multiplexing (OFDM) tone mapping for a physical control channel signal, resulting in a secured physical control channel signal. The transmitter device may transmit, to a receiver device, the secured physical control channel signal. Numerous other aspects are described.

The invention belongs to the technical field of communication navigation, and particularly relates to a covert communication method based on TACAN navigation. Inserting an immediate pulse pair into an auxiliary reference pulse of the TACAN signal emission pulse sequence; and performing channel coding on the subsequent pulse pair for transmitting communication data. The uplink transmission communication data frame of the ground control tower sequentially comprises packet header data, first channel estimation data SINBAL1, first effective data DATA1, second channel estimation data SINBAL2, second effective data DATA2 and protection data from front to back; and the lengths of the two bytes are respectively 6 bytes, 2 bytes, 4 bytes, 2 bytes, 4 bytes and 2 bytes.

A communication method, a first device, and a second device are provided. The method includes: receiving, by a first device, a wireless signal; and obtaining, by the first device, data reported by a second device by removing an interference signal from the wireless signal according to first information, where the first information is associated with the interference signal.

The disclosed embodiments relate to securely delivering firmware to memory devices. In some aspects, the techniques described herein relate to a system including: a firmware generator; a memory device; and an emulation platform, the emulation platform configured to: receive a firmware image from the firmware generator, scramble the firmware image using a scrambler module to obtain a scrambled firmware image, and transmit the scrambled firmware image to the memory device.

Embodiments of this application disclose a backscatter communication method and a related apparatus. The method includes: receiving, by a backscatter device, a first signal from an excitation device, the first signal carries a first sequence determined by the excitation device; modulating, by the backscatter device, backscatter device data to the first signal to obtain a second signal, wherein the backscatter device data is scrambled by the first sequence; backscattering, by the backscatter device, the second signal to a receiving device.

The invention discloses a semantic camouflage communication method and system, a power grid and electronic equipment, and relates to the technical field of power system safety. According to the method, semantic information extracted from a to-be-sent image by a semantic encoder of the semantic communication system is obtained at a sending end of the semantic communication system, and then a semantic information decoding module used for ensuring that both a legal user and a potential eavesdropper in a deployment environment of the semantic communication system can decode is added to the semantic information, and the legal user decodes to obtain the to-be-sent image, and the potential eavesdropper decodes to obtain the artificial noise of the disguised image, so as to obtain the transmission semantic information, pre-codes the transmission semantic information, and sends the pre-coded transmission semantic information. Therefore, the problems that when semantic communication is adopted to carry out power data transmission, confidentiality is maintained through encryption or a physical layer security system, an eavesdropper is easily aware of protection measures, and data transmission security is not high due to the adoption of more complex attacks are solved.

The invention provides an FD-RIS assisted covert communication method and system. The covert communication system comprises a base station, an FD-RIS, a covert user and an eavesdropper. According to the covert communication system, a time modulation technology is utilized to modulate a reflection coefficient of each reflection unit of the FD-RIS, and time delay is introduced in the time modulation process of each reflection unit; the method comprises the steps that an optimization problem is solved, the optimization problem takes maximization of the reachable rate of a hidden user as an optimization target, time delay and time modulation frequency in each reflection unit are obtained with the time modulation frequency constraint of the FD-RIS, the time delay constraint of the reflection units in the FD-RIS and the hidden constraint as constraint conditions, and the time delay and the time modulation frequency in each reflection unit are obtained. According to the method, the concealment performance can be remarkably improved, and the challenge of'safety blind areas' faced by a traditional RIS auxiliary concealed communication system is dealt with.

The invention relates to an electric power communication system optimization technology, in particular to a physical layer security optimization method and equipment for a full-duplex multicarrier power line communication system, and the method combines a full-duplex technology and a time domain artificial noise auxiliary security strategy to construct a multicarrier power line communication system model with a relay; generating a safety rate maximization problem, designing a set of convex approximation method, and performing conversion and simplification of a non-convex optimization problem; designing an iterative solution algorithm, and jointly optimizing the confidential data of the source node, the confidential data of the relay node and the artificial noise power distribution matrix; and optimizing the physical layer safety performance of the full-duplex multi-carrier power line communication system based on the solved power distribution matrix. According to the communication scheme and the solved power distribution vector, the safety performance of the power line communication system is optimized, the limitation of the number of power transmission cables in the power line communication system is avoided, the safety rate maximization of the total transmitting power domain can be realized, and the technical problem that data in an existing multi-hop power line communication system is prone to leakage is solved.

The invention relates to the field of safety detection, and discloses a portable secret-related environment anti-eavesdropping and anti-photo stealing equipment detection device, which comprises a lower shell, an upper shell is mounted on one side of the lower shell, a thermal imaging scanning module is mounted in the middle of the upper shell, wireless detection modules are symmetrically mounted on one side of the upper shell, and the wireless detection modules are mounted on the other side of the upper shell. An endoscopic detection module, a nonlinear node detection module and a vibration spectrum analysis module are sequentially installed on the other side of the upper shell, a lens detection module is installed on the outer wall of the upper shell, handles are installed on the two sides of the lower shell, and a power module is installed at the bottom of the lower shell. The detection data of each sensor is collected in real time through the display control module, the weight of each mode is dynamically adjusted based on the environment change, and when it is detected that the false alarm rate of the wireless detection module is increased due to strong electromagnetic noise, the weight ratio is automatically reduced; and the weight of the nonlinear node detection module or the thermal imaging scanning module with higher anti-interference capability is synchronously improved.

The invention relates to the technical field of communication, and discloses an AI-based adaptive data encryption method and system, and the method comprises the steps: carrying out the frequency domain transformation analysis of an original data flow, and generating a spectrum distribution feature set; the carrier frequencies are screened through a dynamic frequency selection algorithm to obtain an optimal carrier frequency range; performing phase modulation on the data bit stream, and embedding the data bit stream into a subcarrier in an optimal carrier frequency range to generate a first encrypted data stream; when the interference intensity exceeds an interference threshold value, performing directional adjustment on a frequency deviation parameter according to an interference type, and generating a second encrypted data stream; dynamically adjusting the frequency distribution parameters according to the transmission distance data to obtain a frequency distribution parameter set; and performing adaptive modulation and spectrum shaping on the second encrypted data stream based on the frequency distribution parameter set, and outputting a hidden transmission data stream. The method has the following effect that the data hidden transmission capability and the receiving and restoring accuracy in a complex environment can be improved.

The present invention discloses a method for designing an interference noise of speech based on the human speech structure, including the following steps: (1): obtaining a large amount of speech data containing different speakers and different speech contents, extracting voiceprint information, and then building an initial speech data set; (2): for each user, obtaining a small amount of speech data of the user, extracting voiceprint information, and then matching the most similar speech data in the initial speech data set; (3): performing data augmentation on the matched speech data; (4): segmenting the augmented speech data with a phoneme segmentation algorithm to form a vowel data set and a consonant data set; (5): constructing three noise sequences based on the vowel data set and the consonant data set, and performing superimposition to obtain an interference noise; and (6): continuously generating and playing randomly generated interference noise, and continuously injecting the interference noise into recordings to implement continuous interference. With the present invention, the interference noise cannot be removed from the speech, thereby avoiding the leakage of user privacy information.

An embodiment is method performed by an access point (AP) for performing a joint transmission to jointly transmitting a frame to a station (STA) with one or more other APs. The method includes determining a scrambling seed that is to be used for the joint transmission, determining a basic service set (BSS) color for a virtual BSS that is jointly operated by the AP and the one or more other APs based on identifiers associated with the AP and the one or more other APs, and transmitting, as part of the joint transmission, a frame to the STA using the scrambling seed, wherein a preamble of the frame indicates the BSS color for the virtual BSS.

The present disclosure is related to reconfigurable radio equipment and edge computing, and in particular, to technologies for cyber security and radio equipment supporting certain features ensuring protection from fraud, and testing interfaces related to reconfigurable radio equipment. Other embodiments may be described and / or claimed.

Method for encrypting a communication signal s(t) of bandwidth Bs to be transmitted by a transmitter, which is generated by M samples with an equidistant sampling rate R B is represented, where the M samples are divided alternately into N processing branches, resulting in N partial signals with a sampling rate of R B / N, where N ≥ 2, - where in a first processing branch the sample values ​​1, N +1, 2N +1, .... MN, - in a second processing branch the sample values ​​2, N+2, 2N+2,.... M-(N+1) and - in the N ten processing branch containing the sample values ​​N, 2N, 3N,... M, whereby the sample values ​​of each partial signal of the N processing branches are each converted into an analog partial signal, where the analogue partial signals in the N processing branches are multiplied by a key function shifted from processing branch to processing branch by Δt = 1 / Bs = 1 / (NΔf), where the key functions in the individual branches were initially orthogonal to each other, before their orthogonality was removed by applying a shift key, which imposed defined phase changes on the key functions, where the partial signals of all processing branches modified by the key function are added together to form an output signal s'(t) and sent.

The invention provides an information security transmission method and system for a multiplexing data bus, and relates to the technical field of information security, and the method comprises the steps: deploying a trusted noise node on the multiplexing data bus; a transmission feature vector of the information transmission request is read, the transmission feature vector is input into a generative twinning network for analysis, a twinning transmission feature vector is obtained, and the generative twinning network comprises a predefined similarity item and a corresponding preset similarity threshold value; and sending the information to a trusted noise node for processing to obtain a twin noise signal and a noise transmission protocol, and when an information transmission request is executed, performing interference security transmission on the twin noise signal based on the noise transmission protocol. The technical problem that in the prior art, a multiplexing data bus usually uses a static protection mechanism, the protection means is single, complex attacks are difficult to cope with, and the information transmission safety is insufficient is solved.

Examples described herein include systems and methods which include wireless devices and systems with examples of mixing input data with coefficient data specific to a processing mode selection. For example, a computing system with processing units may mix the input data for a transmission in a radio frequency (RF) wireless domain with the coefficient data to generate output data that is representative of the transmission being processed according to a specific processing mode selection. The processing mode selection may include a single processing mode, a multi-processing mode, or a full processing mode. The processing mode selection may be associated with an aspect of a wireless protocol. Examples of systems and methods described herein may facilitate the processing of data for 5G wireless communications in a power-efficient and time-efficient manner.

Systems and methods to continuously classify temporal communication data associated with a computing device are described. In one embodiment, temporal communication data associated with the computing device is accessed and processed to create a plurality of preprocessing models. The preprocessing models are used to train a neural network. The neural network derives one or more properties associated with the computing device from the temporal communication data. A device fingerprint is defined from the one or more properties. Subsequent to defining the device fingerprint, additional temporal communication data associated with the computing device is accessed. The neural network derives one or more additional properties associated with the computing device from the additional temporal communication data. The one or more additional properties are aggregated into the defined device fingerprint, refining the defined device fingerprint.

Systems and techniques are provided for wireless communications. For example, a process can include, obtaining a message for transmission to a receiving device, determining a plurality of beamforming weights for transmitting a portion of the message toward a direction of the receiving device. A number of beamforming weights is equal to a number of transmit array elements. Each beamforming weight corresponds to a respective transmit array element. A beamforming weight is configured to turn off a transmit array element during transmission of the portion of the message. The process can include outputting an array puncturing notification indicative of transmission of the portion of the message by the plurality of transmit array elements with the transmit array element corresponding to the beamforming weight turned off and transmitting the portion of the message by the plurality of transmit array elements with the transmit array element corresponding to the beamforming weight turned off.

Amplitude and phase 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 amplitude-amplitude (AM-AM) and amplitude-phase (AM-PM) errors 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 and AM-PM errors. As a result, it is possible to correct the AM-AM and AM-PM errors across the modulation bandwidth with reduced complexity to thereby improve efficiency and linearity of the wireless communication circuit.

A system and method for enhancing RF signal jamming. The method includes steps of pre-distorting an input signal to define a pre-distorted signal; adjusting a voltage of a power supply of a power amplifier based upon the pre-distorted signal to envelope track; power sequencing the power amplifier to power up and power down the amplifier; achieve a low probability of intercept of the signal, and transmitting the adjusted signal. Systems are other methods are likewise disclosed.

A method is disclosed for transmission of one or more packets in an unlicensed communication environment based on a transmit power setting. Each packet includes a first part and a second part, wherein the first part is associated with a potential received signal-to-noise ratio (SNR) when the transmit power setting is used. The method includes processing the first part of the one or more packets before transmission, wherein the processing comprises enforcing a reduced received SNR for the first part, which is lower than the potential received SNR. In some embodiments, enforcing the reduced received SNR for the first part includes adding noise to the first part and / or applying a decreased transmit power setting for the first part. In some embodiments, the transmission of the one or more packets is in accordance with an IEEE 802.11 standard and the first part is a legacy preamble.

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 present invention proposes a RIS-assisted cognitive radio wireless security communication transmission method using partial CSI. In the RIS-assisted large-scale multi-input multi-output cognitive radio wireless security communication system, in order to enable the secondary transmitter and the secondary user to communicate with the main transmitter and the main user in the same frequency band, and to ensure that the interference of the secondary transmitter to the main user is within a certain threshold, the initial value of the RIS reflection coefficient matrix is ​​set, and the beamforming matrix is ​​designed using the partial CSI; the RIS reflection coefficient matrix is ​​designed using the partial CSI according to the beamforming matrix; the above operations are repeated until the system security rate converges. The present invention can effectively improve the spectrum efficiency under the premise of knowing the partial CSI, alleviate the spectrum scarcity problem in actual communication scenarios, and improve the security rate of the system.

Certain aspects relate to techniques for canceling artificial noise via spatial processing. For example, artificial noise may be added to a transmission of a legitimate signal to conceal the legitimate signal from an unintended receiver. Aspects described herein relate to cancelation of artificial noise that has been added to physical layer transmissions. For example, a first wireless node may transmit a first transmission comprising a first artificial noise signal combined with a first data signal, and a second transmission comprising a second artificial noise signal. Due to the spatial differences in the first transmission and the second transmission, the artificial noise signals may zero out after being soft-combined by the receiving device.

An accessory for a smart device and a method from controlling the same includes at least one transducer per receiver of the smart device, each transducer physically located in close proximity to a physical location of each receiver. An amplifier outputs noisy frequency signals to each transducer at a power level sufficient to cause the signal-to-noise ratio at each receiver to be negative. A controller outputs the noisy frequency signals for each transducer to the amplifier according to a mode, the controller randomly hopping the noisy frequency signals for each transducer in a manner sufficient to prevent audio processing software associated with each receiver from being able to identify and cancel the noisy frequency signals.

An artificial noise-based secure communication method not limited to the null space of the legitimate channel, adding a first type of artificial noise w to the information signal s k and a second type of artificial noise w m to form the transmission signal x1, where w k is located in the null space of the legitimate channel matrix. If there is no channel null space, then there is no w component in the transmission signal x1 k component, and w m is located in the column space of the legitimate channel matrix. The present invention can adopt two-stage communication, and the receiver adds the two received signals; the transmission signal in the first stage is x1, and the transmission signal in the second stage is x2. The communication system applying the artificial noise-based secure communication method of the present invention not limited to the null space of the legitimate channel can be a MIMO communication system or a SISO communication system or a MISO communication system. The present invention hides the transmission of the secure information through two types of artificial noise, and further eliminates the interference of the artificial noise to the legitimate users through two-stage signals.

A method for variable length decoding, the method including: receiving, in a default word length mode, at least one first data word having a default first word length; combining the received at least one first data word as a first portion of data; receiving, after the at least one first data word, a transition word indicative of transitioning to a variable word length mode; receiving, after the transition word, a first word length word indicative of a second word length; receiving, after the first word length word, at least one second data word having the second word length; and combining the received at least one second data word as a second portion of the data.

Systems and techniques are provided for performing wireless communications. In some aspects, a user equipment (UE) may receive a first transmission from a first wireless node via a first channel, the first transmission including a first artificial noise (AN) signal combined with a first data signal, where the first AN signal is generated based on channel state information (CSI) of the first channel. The UE may receive a second transmission from a second wireless node via a second channel, the second transmission including a second AN signal combined with a second data signal, where the second AN signal is generated based on the CSI of the second channel and is different from the first AN signal. The UE may determine a data message based on the first transmission and the second transmission.