152results about "Data stream serial/continuous modification" patented technology

A system and method for adaptive edge-cloud data processing dynamically distributes computational tasks between edge devices and cloud infrastructure in response to changing conditions. The system continuously monitors resource availability, network parameters, and workload characteristics while predicting future conditions using hierarchical forecasting models. A multi-objective optimization approach determines optimal task distribution, balancing processing latency, energy consumption, bandwidth utilization, and result quality. The system implements a partitionable processing pipeline that enables seamless task migration through state synchronization protocols and checkpoint mechanisms. During migration, the system preserves processing continuity by establishing dependencies, creating execution checkpoints, and verifying successful state transfer. Performance metrics may be continuously collected and analyzed to improve future decision-making. The system maintains operational resilience during connectivity disruptions through local decision-making capabilities and eventual consistency protocols, making it suitable for diverse applications including industrial IoT, connected vehicles, healthcare wearables, and smart city infrastructure.

The invention discloses a data access permission control method and system based on a block chain, and relates to the technical field of block chains, the system is composed of a plurality of function modules, and the system comprises a hierarchical permission module which adopts a role hierarchical strategy and defines the access granularity of a role through an intelligent contract; the dynamic permission adjustment module is used for dynamically adjusting the permission range by analyzing user behaviors in real time through machine learning according to the principle of following the minimum permission in the permission distribution process; attribute encryption and zero-knowledge proof are introduced, an access key is dynamically generated according to user attributes, and sensitive information is hidden in the verification process; the multi-chain collaboration module is used for coding an intelligent contract through an authority rule, automatically executing access request verification, storing encrypted data through a private chain, managing an index and an access strategy through an alliance chain, isolating a storage domain from an access domain, and carrying out process traceability on a data request through a cross-chain verification mechanism; and the key management module is used for generating a true random number private key by adopting a hardware security unit.

The invention relates to the technical field of image encryption, in particular to an image chaotic encryption method based on a magnetic control memristor and electronic equipment, and the method comprises the steps: obtaining an input image; calculating a hash value or generating a random challenge value according to the input image to determine input excitation; judging whether the magnetic field intensity is in a set legal magnetic field domain; if so, calling a real response path of the magnetic control memristor to generate a real response code stream at least according to the input excitation and the magnetic field intensity; constructing a chaotic parameter and a disturbance source according to the real response code stream, and injecting the chaotic parameter and the disturbance source into the fractional order hyperchaotic system; generating a dynamic key stream through a fractional order hyper-chaotic system according to the chaotic parameters; the dynamic secret key stream is combined with a mapping algorithm to globally scramble pixels of an input image, the dynamic secret key stream and a disturbance source are used to carry out bidirectional diffusion on the scrambled image, and a chaotic encryption image is obtained. According to the invention, the magnetic control memristor PUF and the fractional order hyper-chaotic system are deeply fused, and a hardware and algorithm collaborative image encryption mechanism is realized.

Embodiments resynchronize encrypted network traffic. A capture flow that includes network traffic captured from encrypted network flows may be monitored and the captured network traffic may be decrypted for analysis. A hole in the capture flow may be determined based on gaps in portions of the captured network traffic disabling the monitoring of the capture flow and the decryption of the captured network traffic. A size of the hole may be determined based on a size of the gap in the portions of the captured network traffic. Other network traffic may be captured from the capture flow subsequent to the hole. Cipher resynchronization parameters may be determined based on the size of the hole, other portions of the captured network traffic, or the encryption protocol. The other portions of the captured network traffic may be decrypted based on the cipher resynchronization parameters to reenable monitoring of the capture flow.

Circuits defined by n-state switching tables with n>2 are transformed by at least one n-state inverter which may be a Finite Lab-transform (FLT) into a Finite Lab-transformed (FLTed) n-state switching devices. Computer operations defined by transformed or modified n-state switching tables are applied in cryptographic operations, including one or more message digests or hashing methods or computer one-way functions. A keyword is generated from a public keyword by at least one modified known hashing method. A known hashing method may be selected from the group consisting of SHA-1, SHA-2, SHA-3, MD5, MD6, Blake2, Blake3 and CubeHash. Internal states of known hashing methods are modified to generate unpredictable hash values.

Technology permitting secure storage and transmission of data stream as well as tiered access to multiple data stream according to permission. Data streams may be encrypted using symmetric encryption performed with varying symmetric keys according to a key stream of symmetric keys. Native data may be discarded for safety. Whole or partial key streams may be encrypted using the public keys of authorized entities having permission to access respective data streams or portions thereof. Only the corresponding private keys can decrypt the encrypted key streams required to decrypt the encrypted data streams. Thus rigorous access control is provided. IT personnel accessing data stream files on a server or intruders maliciously obtaining files will not be able to derive the data stream. Sensitive data streams may be stored using cloud services despite inherent risks.

The invention discloses an unmanned aerial vehicle control method and device based on a random key stream, and a medium, and relates to the technical field of aircraft control. The method comprises the following steps: presetting a chaos initial value for a main chaos system of an encryption end; selecting a switching strategy according to the current state component of the main chaotic system so as to switch the auxiliary chaotic system; generating a random key stream coefficient through a seed random number generator, and combining the random key stream coefficient with the chaotic initial value to obtain a private key; acquiring an aircraft measurement data plaintext, injecting the plaintext into the chaotic system, and generating a ciphertext in combination with the random key stream coefficient; transmitting the ciphertext to a decryption end, synchronizing the private key and the switching strategy at the decryption end, and restoring the plaintext; the restored plaintext is input into a state feedback controller, an anti-saturation control instruction is generated, and the state feedback controller comprises a nonlinear compensation function. According to the method, the measurement data of the aircraft is encrypted and decrypted by the chaotic system key stream, the length of the private key is expanded, and the security is improved.

Examples are described for dynamically encrypting and / or decrypting a file formed of multiple blocks of ordered data. In one example, a method of dynamically encrypting a file to enable partial decryption of the file includes generating, using a secret key and one or more initialization vectors, a keystream for the multiple blocks of ordered data, encrypting the multiple blocks of ordered data of the file by performing a logical operation of the keystream with the multiple blocks of ordered data in a one-to-one correspondence, and building a file index of the file to identify location information of the multiple blocks of ordered data. The method may further include dynamically decrypting at least a portion of the file by decrypting at least one selected block of encrypted data of the file using a portion of the keystream, the portion of the keystream corresponding to the at least one selected block.

The invention discloses an online entropy estimation method based on a parallel technology, and aims to solve the problem that a conventional random number entropy estimation method is slow in speed and cannot meet the detection requirements of a modern high-speed random number generator, the parallel technology is applied to entropy estimation, and the speed of entropy estimation is greatly improved by utilizing the parallel computing capability of a GPU (Graphic Processing Unit). The method and the device can meet the requirement of rapid detection of key security in the information interaction process of identity management. Besides, by means of the post-processing method of the entropy estimation result, the reliable entropy estimation result can be reserved and inaccurate values can be eliminated regardless of sudden change data or gradual change data. Besides, in the entropy estimation process, the calculation formula of the statistical entropy is improved according to the size change of the sample size, the accuracy of random number entropy estimation is improved, and therefore the requirement for accurate detection of key security in the information interaction process of identity management is met.

A secure transmission method includes an Internet Protocol (IP) camera (IPC) that encrypts a to-be-transmitted video stream based on a pre-obtained first stream key to obtain an encrypted video stream. The IPC encrypts the first stream key based on a pre-obtained first wrapping key to obtain a first encrypted stream key. The IPC sends a data stream to a cloud platform, where the data stream includes the encrypted video stream and the first encrypted stream key. The cloud platform stores the data stream. A user equipment receives the to-be-processed data stream from the cloud platform. The user equipment decrypts the first encrypted stream key based on a pre-obtained first wrapping key to obtain the first stream key. The user equipment decrypts the encrypted video stream based on the first stream key to obtain a to-be-played video stream.

A system and method for efficient data storage, transfer, synchronization, and security using automated model monitoring and training. The system analyzes test datasets to detect data drift, retraining encoding and decoding algorithms as needed. New data sourceblocks are created and assigned codewords, compiling an updated codebook for distribution to connected devices. A novel dyadic distribution subsystem simultaneously compresses and encrypts data by transforming input streams into a dyadic distribution. This process generates a compressed main data stream and a secondary stream of transformation information, which are combined into a secure output. The system includes a network device manager for optimizing codebook distribution based on device resource usage. Operating in both lossless and lossy modes, the system offers flexible, efficient, and secure data handling across various network configurations.

This application is applied to the field of communication technologies, and provides a data transmission method, a communication apparatus, and a communication system, to resolve a problem in the conventional technology that user service bandwidth is used for encrypted transmission. The method includes generating N ciphertext data streams, where a first ciphertext data stream is any ciphertext data stream in the N ciphertext data streams. The first ciphertext data stream includes at least two first alignment markers AMs and at least two ciphertext data segments. One ciphertext data segment is included between every two first AMs, and one first AM is included between every two ciphertext data segments. The at least two first AMs are used for aligning data of the N ciphertext data streams.

Embodiments are directed to systems and techniques to perform authentication operations in a call center computing environment with transcoded encrypted data.

The invention discloses a parallel image encryption method based on one-dimensional improved Logistic mapping, which relates to the technical field of image encryption, and is characterized by comprising the following steps: S1, designing improved one-dimensional Logistic mapping; s2, generating a key of a password system from the plaintext information; s3, a color image to be encrypted is split into three independent color channels, and preparation is made for parallel processing; and S4, generating a key stream of the cryptosystem by using the key and the improved one-dimensional Logistic mapping. The technical problem to be solved by the invention is to provide an image encryption method based on one-dimensional improved Logistic mapping parallelism, and a chaotic sequence is generated through improved Logistic mapping, so that pixel-by-pixel encryption processing is carried out on an image. According to the method, the confidentiality and the attack resistance of the image data are enhanced, and the encryption speed is increased, so that the method is suitable for scenes such as real-time image transmission and large-scale image storage.

A system and method for adaptive data processing combining compression and encryption. The system analyzes input data characteristics, compares probability distributions, and creates a transformation matrix to convert data into a dyadic distribution. It generates a main data stream of transformed data and a secondary stream of transformation information. The system dynamically selects and applies processing techniques, including transformation, encoding, compression, and encryption algorithms, based on analyzed characteristics and real-time performance metrics. It compresses the main data stream using Huffman coding and implements security measures to protect the output. A feedback loop monitors technique effectiveness, updates a knowledge base, and influences future selections. The system can operate in lossless, lossy, or modified lossless modes, adapting to different application requirements. This approach offers an efficient solution for scenarios where both data reduction and security are critical concerns.

A dynamic and verifiable searchable encryption method based on updatable encryption and blockchain and a system thereof are provided. The method is suitable for the real scene where the data user and the data owner are not the same party. The method adopts the updatable technology to update the secret key in the searchable encryption, and the security of the key update could achieve Chosen Ciphertext Security (CCA) and Ciphertext Integrity (CTXT) security. In addition, the method is used to judge whether the cloud server is “trustworthy” by verifying the search results publicly based on the blockchain. Therefore, the verifiable dynamic searchable encryption method based on updatable encryption and blockchain has been greatly improved in terms of practicability and security.

A system, method, and signal provided, characterized by transmitting and receiving a stream of samples. On the transmitting side (Alice), generating a stream of samples for driving a transmitter, each sample having an in-phase (1) component and a quadrature (Q) component, wherein the stream of samples is generated from a stream of pilot symbols and a stream of QKD symbols, wherein the pilot symbols belong to an alphabet of M pilot symbols and the QKD symbols belong to an alphabet of N QKD symbols; mapping a pilot symbol of the stream of pilot symbols to a group of constellation points in accordance with a one-to-one mapping from the alphabet of M pilot symbols to M groups of constellation points in an I-Q space, wherein each of the M groups comprises N constellation points; and mapping a QKD symbol of the stream of QKD symbols to a constellation point in the I-Q space in accordance with a one-to-one mapping from the alphabet of N QKD symbols to the N constellation points of the group of constellation points to which the pilot symbol is mapped. On the receiving end, obtaining the stream of samples, the stream of samples representing a component of a received signal, each sample having an in-phase (1) component and a quadrature (Q) component; generating a stream of pilot symbols from the stream of samples, in accordance with a one-to-one mapping from M groups of constellation points in an I-Q space to an alphabet of M pilot symbols, wherein each of the M groups comprises N constellation points; and generating a stream of quantum key distribution (QKD) symbols from the stream of samples, in accordance with an M-to-one mapping from a set of M*N constellation points of the M groups to an alphabet of N QKD symbols, wherein the M-to-one mapping from the set of M*N constellation points to the alphabet of N QKD symbols comprises, for each respective group of the M groups, a one-to-one mapping from the N constellation points of the respective group to the alphabet of N QKD symbols.

The present application discloses a method, device, and medium for controlling a drone based on a random key stream, and relates to the field of aircraft control technology. The method includes: presetting a chaotic initial value for the main chaotic system of the encryption end; selecting a switching strategy based on the current state component of the main chaotic system to switch the auxiliary chaotic system; generating a random key stream coefficient through a seed random number generator, combining the random key stream coefficient with the chaotic initial value to obtain a private key; obtaining the plaintext of the aircraft measurement data, injecting the plaintext into the chaotic system, and generating ciphertext in combination with the random key stream coefficient; transmitting the ciphertext to the decryption end, synchronizing the private key and the switching strategy at the decryption end, and restoring the plaintext; inputting the restored plaintext into a state feedback controller to generate an anti-saturation control instruction, and the state feedback controller includes a nonlinear compensation function. The present application uses the above method to implement encryption and decryption of the aircraft's measurement data using the chaotic system key stream, extend the private key length, and improve security.

The invention relates to the technical field of signal acquisition of an implantable sensor, in particular to a signal acquisition system of a multi-modal implantable sensor, which comprises the following steps: generating a personalized monitoring model containing a risk period and a lightweight abnormal feature library based on historical data of a patient through a model initialization module, the implantable sensor is switched between a low-power-consumption monitoring mode and a key monitoring mode through a mode switching judgment module according to whether the current time is in a risk time period or not, in the low-power-consumption mode, part of signals are collected at low frequency and subjected to real-time feature comparison, if the signals are abnormal, the key mode is triggered, and in the key mode, the implantable sensor is switched between the low-power-consumption monitoring mode and the key monitoring mode. All the sensors are awakened to collect multi-modal signals at high frequency and encrypt the multi-modal signals to form a data packet, the communication and fusion analysis module forwards the data packet to a cloud for feature level and decision level fusion analysis, a model is optimized according to the data packet, an update instruction is generated, and the model update module safely issues the instruction to the sensors and updates the personalized monitoring model of the sensors. Intelligent, low-power-consumption and safe physiological monitoring is realized.

A method for tamper protection in cryptographic calculations is provided. A cryptographic calculation includes a plurality of normal rounds and a plurality of redundant rounds. The method includes obtaining a first variable x and a second variable y using a random number generator; dividing the normal rounds into a first normal section and a second normal section, and dividing the redundant rounds into a first redundant section and a second redundant section according to the first variable x and the second variable y; executing the first normal section and the first redundant section in sequence using a clock signal; in response to completion of the first redundant section and a first calculation result of the first normal section and a second calculation result of the first redundant section being the same, executing the second normal section and the second redundant section in sequence to complete the cryptographic calculation.

An apparatus and method for checking plausibility of a data stream are described. According to an aspect, one or more supplemental information messages are considered in the trustworthiness of a data stream. According to another aspect, the data stream indicates whether a certain segment is a first segment in the sequence of assigned segments or whether a certain segment is a last segment in the sequence of assigned segments. Depending on further segments, duplication of certain supplemental information messages within certain portions of the data stream is not included in the trustworthiness check or is prohibited in the data stream.

An intra-vehicle network-based communication method and an apparatus are provided, to resolve a problem in the conventional technology that a packet is easy to be eavesdropped on when an ECU transmits the packet. In this application, a first ECU performs an operation using a first key and a first fresh value to generate a keystream; performs an exclusive OR operation using the keystream and a to-be-transmitted first plaintext packet to generate a first ciphertext packet; and sends the first ciphertext packet to a second ECU. The first fresh value is a value generated by a counter in the first ECU when the first ECU transmits a packet, and the counter is configured to record a quantity of packets transmitted by the first ECU. The first ECU transmits the first ciphertext packet to the second ECU. This can prevent the first packet transmitted by the first ECU from being eavesdropped on, and help improve confidentiality of the packet transmitted by the first ECU.

To allow a plurality of users using a secret communication network to efficiently share messages.SOLUTION: A controller 100 controls a network having a plurality of user nodes and a link connecting two user nodes and assigned with a key, and the controller comprises: a division unit 110 that divides the plurality of user nodes into a plurality of groups; a first instruction unit 120 that instructs the user nodes to collect, by using the key, messages held in a predetermined number of user nodes; a second instruction unit 130 that instructs a specific node in the network to collect, by using the key, messages initially held in the plurality of user nodes belonging to the groups; a third instruction unit 140 that instructs the specific node to calculate the exclusive OR of the plurality of messages and transmits the exclusive OR to the user nodes without using the key; and a fourth instruction unit 150 that instructs the user nodes to obtain messages in the other user nodes that the user nodes have not obtained yet.SELECTED DRAWING: Figure 7

This application provides a secure transmission method for a video stream and an apparatus. The secure transmission method for a video stream in this application includes: An IPC encrypts a to-be-transmitted video stream based on a pre-obtained first stream key to obtain an encrypted video stream. The IPC encrypts the first stream key based on a pre-obtained first wrapping key to obtain a first encrypted stream key. The IPC sends a data stream to a cloud platform, where the data stream includes the encrypted video stream and the first encrypted stream key. The cloud platform stores the data stream. User equipment receives the to-be-processed data stream sent by the cloud platform, where the to-be-processed data stream includes the encrypted video stream and the first encrypted stream key. The user equipment decrypts the first encrypted stream key based on a pre-obtained first wrapping key to obtain the first stream key. The user equipment decrypts the encrypted video stream based on the first stream key to obtain a to-be-played video stream. In this application, leakage of user privacy data and a stream key can be avoided.

A method is disclosed. The method includes receiving, by a processing network computer from a relying party computer associated with a relying party, a request for data associated with a user operating a user device. The processing network computer may retrieve first encrypted data of the user having a user-layer of encryption. The processing computer can then generate a second symmetric key to add a relying party-layer of encryption to the first encrypted data using a stream cipher. The doubly encrypted data may be transmitted to a user device that removes the user-layer of encryption on the first doubly encrypted data, and then adds a second relying party-layer of encryption to form second doubly encrypted data. The second doubly encrypted data may be transmitted to the relying party computer, which can remove both relying party-layers of encryption to gain access to the data associated with the user.

An intra-vehicle network-based communication method and an apparatus are provided, to resolve a problem in the conventional technology that a packet is easy to be eavesdropped on when an ECU transmits the packet. In this application, a first ECU performs an operation using a first key and a first fresh value to generate a keystream; performs an exclusive OR operation using the keystream and a to-be-transmitted first plaintext packet to generate a first ciphertext packet; and sends the first ciphertext packet to a second ECU. The first fresh value is a value generated by a counter in the first ECU when the first ECU transmits a packet, and the counter is configured to record a quantity of packets transmitted by the first ECU. The first ECU transmits the first ciphertext packet to the second ECU. This can prevent the first packet transmitted by the first ECU from being eavesdropped on, and help improve confidentiality of the packet transmitted by the first ECU.

A data processing apparatus comprising circuitry configured to: receive digital video content over a first content distribution path; determine if a match condition is met, the match condition being that the first content distribution path matches a second content distribution path indicated by verifiable distribution information provided with the digital video content; if the match condition is met, allow output of the digital video content for presentation. Determining whether the match condition is met may comprise performing an extraction process for extracting distribution information from the digital video content; verifying a digital signature of successfully extracted distribution information using a public key associated with a legitimate source of the digital video content; determining whether the first content distribution path matches the second content distribution path of successfully extracted distribution information; if distribution information is successfully extracted from the digital video content, the digital signature is successfully verified and the first content distribution path matches the second content distribution path, determine the match condition to be met.

A method is provided for obfuscating program code to prevent unauthorized users from accessing video. The method includes receiving an original program code that provides functionality. The original program code is transformed into obfuscated program code defining a randomized branch encoded version of the original program code. The obfuscated program code is then stored, and a processor receiving input video data flow uses the obfuscated program code to generate an output data flow.

The present invention relates to the field of coding, and more particularly to an improved Festel-based encryption method for EPC codes of aircraft equipment. The method comprises the following steps: S1, mapping the aircraft equipment code to the EPC code; S2, encrypting the aircraft equipment EPC code using the improved Festel network, including the following substeps: S21, segmenting the EPC code into scrambling, left, and right halves; S22, generating a pseudorandom sequence using a pseudorandom number generator; S23, obtaining a binary number as a round key based on the pseudorandom sequence; and S24, iterative encryption to obtain a final encrypted result. The present invention maps traditional aircraft equipment codes to EPC codes and encrypts them using the improved Feistel network. This method not only enhances information uniformity and traceability, but also ensures data security while preserving the standard format of the EPC code.

A system, method, and signal. On a transmitting side (Alice), a stream of samples for driving a transmitter is generated from a stream of pilot symbols and a stream of QKD symbols. On a receiving side, a stream of samples is obtained, the stream of samples representing a component of a received signal. A stream of pilot symbols is generated from the stream of samples in accordance with a one-to-one mapping from M groups of constellation points in an I-Q space to an alphabet of M pilot symbols. Each of the M groups comprises N constellation points. A stream of quantum key distribution (QKD) symbols is generated from the stream of samples in accordance with an M-to-one mapping from a set of M*N constellation points of the M groups to an alphabet of N QKD symbols.