34results about How to "Secure data communication" patented technology

A system and method for block reconciliation of interactions comprising a network-connected block reconciliation computer connected to a plurality of connected devices and to one or more blockchains to enable an object compiler to receive a plurality of criteria from a requesting device. The compiler the receives a plurality of blocks from the public ledger blockchains based on the criteria. Each block corresponding to a preconfigured interaction object previously written by devices either during or after the completion of a transaction. The compiler analyzes the preconfigured interaction objects to determine if there is corresponding supplemental object. The compiler requests the supplemental blocks from the blockchains, and processes supplemental objects based on type, if no corresponding supplemental object it found, the associated interaction object is flagged.

The invention relates to a data transmitting method and a first manipulation host. The method comprises the steps that a first Beidou time synchronization module is utilized to synchronize the first clock of the first manipulation host so that the determined time after completion of synchronization is obtained; the determined seed data uniquely corresponding to the determined time are obtained according to the stored agreed rules; data to be transmitted are encrypted by utilizing the determined seed data so that the determined non-feature code source is obtained; electro-optic conversion is performed on the determined non-feature code source so that the determined optical signal is obtained; and the determined optical signal is transmitted to a second manipulation host by utilizing optical fibers. Secure and high-efficiency data communication and command control between a far-end unattended radar station and a near-end control center can be effectively realized so that the method has the communication control means which is high in anti-interception capability, long in transmission distance, great in real-time performance, low in cost and easy to realize. Besides, practicality, reliability and stability are quite high so that the method has important social, economic and military meaning in enhancing automation level of national defense equipment of China.

The invention relates to a method for position-independent transmission and reception of data to and from a high-capacity passenger aircraft (10). The method is characterized by comprising steps of: installing, in the vicinity of a window of the passenger aircraft (10), at least one antenna (16) designed for communicating with an airborne communications hub (22); transmitting and / or receiving thedata between at least the antenna (16) and an airborne communications hub (22) during the flight; and transmitting the data within the aircraft (10), between the antenna (16) and a routing device (20)connected to the antenna (16).

The invention provides a physical layer key extraction method based on channel gain compensation and subcarrier correlation. First, collect and detect channel state information; then, perform channel gain compensation through non-reciprocity learning to enhance the reciprocity of the channel state information of both parties; then, obtain a more reliable initial key by subcarrier clustering as a whole and quantify ;Finally, conduct consensus negotiation and enhancement processing on the initial key to obtain the final security key. The present invention utilizes channel gain compensation and subcarrier correlation analysis to realize safer and more effective data communication in the original communication system based on channel state information, and provides more reliable key bit stream with low bit error rate for wireless encrypted communication.

A removable data storage medium including a serial interface; a non-volatile storage medium; a memory controller controlling data transmission between the serial interface and the non-volatile storage medium, a receiving unit; and a write protection unit; wherein the receiving unit is configured to receive a device identification feature from a medical device that can be connected to the removable data storage medium; and the write protection unit is configured to compare the device identification feature with a predetermined internal criterion, and, if the device identification feature complies with the predetermined internal criterion, permits read and write access from the medical device to the non-volatile storage medium and, if the device identification feature does not comply with the predetermined internal criterion, limits access of the medical device to the non-volatile storage medium to read access.

This invention relates to a mobile phone crypto suitable for realizing security voice and data communication of mobile communication network and PSTN including a handheld terminal set integrating a voice IO unit, a voice code and decode unit, a voice post process unit, a primary control unit, a supply management unit, a man-machine interface unit, a connection-expansion unit, a ciphere / de-ciphere unit and a security management unit, a special connection cable and special interface fittings. When a security communication is needed, the crypto of said mobile phone can cut in the mobile communication net or the PSTN quickly in the way of wire or wireless to ensure the security voice session or data communication by end to end and ciphering every time under the internal control of the crypto.

The present invention provides a device using power line communication. The fire wire is connected to the device using power line communication as a power supply input, and communicates cascaded with other devices using power line communication through a transmission line, which includes: a zero-crossing detection module, a voltage A detection module, a power module, a switch module and a control module, the control module is connected to the zero-crossing detection module, the voltage detection module and the switch module, and is used to control the switch module to adjust the signal voltage change in the transmission line according to the information to be sent; And it is used to obtain information according to the voltage variation of the voltage detection module. By adopting the technical scheme of the present invention, data communication through AC signals can be realized only by adding one transmission line, and the transmission line and the live wire can be arranged together during wiring, so as to realize safe and reliable long-distance data communication with a low-cost and simple circuit structure .

The invention provides an emergency command scheduling method and an emergency command scheduling system for a sudden environmental event. The method comprises the steps as follows: a mobile terminal acquires a RAS public key from a network server, and stores the RSA public key in a local memory; the mobile terminal encrypts login information by using the RAS public key, and sends the encrypted login information to a network server, wherein the login information comprises a session key, an account name, a login password and hardware equipment information of the mobile terminal; after verifying authenticity of the login information, the network server generates the login information into a login certificate and a user ID, and stores the user certificate and the user ID into a database server; the network server encrypts the user certificate and the user ID by using the session key and then sends the encrypted user certificate and user ID to the mobile terminal; and session data and the user certificate are encrypted by using the session key and then sent to perform communication between the mobile terminal and the network server. The system is used for implementing the above method. According to the method and the system provided by the invention, data communication security between the mobile terminal and the server can be ensured.

The present application discloses a method, device and computer-readable storage medium for detecting false data injection attacks. Applied to a three-layer smart grid framework consisting of PMU layer, local aggregation layer, and control layer, the local aggregation layer pre-trains multiple fuzzy neural network models that are independent of each other and are used to detect false data in the aggregated data of the local aggregator; Receive the measurement data and estimated state values ​​sent by each local aggregator and input them into the corresponding fuzzy neural network model to obtain the false data information of each local aggregator; if there is at least one target local aggregator whose false data value is greater than the threshold, then determine the bus Suffering from false data injection attacks; the local aggregator aggregates the measurement data collected by the PMUs in the corresponding area and performs state estimation to obtain the estimated state value, and sends the data to the control layer after the identity legality verification request is passed. This application can effectively resist false data injection to attack the grid and ensure the security of grid communication.