3 results about "Pairwise key" patented technology

The invention discloses an electro-tricycle Bluetooth binding method and system, belongs to the technical field of electro-tricycle intelligent control, effectively improves the accuracy of data association of a production end, establishes'Bluetooth MAC address-equipment SN code-frame number 'three-dimensional mapping data through double verification of the production end, and improves the accuracy of data association of the production end. By combining station-level secondary verification and a production line sound-light alarm mechanism, data mismatching caused by manual wrong scanning and cross-station operation, AES-256 encrypted storage and cloud multi-access control are completely eradicated, data transmission and storage safety is guaranteed, the problems of single-dimension association and data leakage and tampering are solved, the safety of the whole process of a binding link is enhanced, and the safety of the whole process of the binding link is improved. The cloud triple verification resists illegal requests, the dynamic secret key is embedded into a frame number fragment and a timestamp, and the alarm triple verification and a failure dormancy mechanism are matched, so that hidden dangers such as secret key counterfeiting and multiplexing, communication defense line building through BLE connection and SN code secondary verification, open type pairing cracking and weak secret key security are avoided.

The application provides a collision attack post-processing method and system based on a genetic algorithm. A plurality of groups of random plaintexts are obtained first, and corresponding power traces are obtained by encryption through a cryptographic algorithm; correlation-enhanced collision attacks are performed on the random plaintexts and the power traces to obtain possibility rankings of pairwise key byte collision values; average values of energy traces of each group of power traces are calculated, and square sums of energy trace differences between key bytes are calculated; collision values between pairwise key bytes are confirmed according to a theoretical distribution of the square sums; the pairwise key byte collision values are rearranged, and the values marked as collisions are moved forward, and the values not marked as collisions are moved backward; initial populations are input into a genetic algorithm framework for evolution, and selection, crossover and mutation operations are implemented until an evolution generation reaches a threshold value or a correct collision chain is found, and the individual with the highest fitness is output as a result. The application significantly improves the efficiency and accuracy of the collision attack by optimizing the evaluation and selection strategy of key candidates.

This invention relates to the field of physical layer secure communication technology, and provides a method and apparatus for synchronously generating group keys and paired keys. The method includes: a central node acquiring the azimuth angles and corresponding channel complex gains of each edge node, designing the switching array parameters of a time modulation array based on the azimuth angles of each edge node, calculating the average radiation pattern coefficients of all edge nodes, and transmitting them collectively; the central node generating a group key and modulating it into a modulated signal using the time modulation array and transmitting it; the central node generating corresponding paired keys for each edge node and encrypting them to obtain paired key ciphertext, which is then sent to the corresponding edge node; each edge node receiving the modulated signal performs coherent demodulation to obtain demodulated symbols, performs hard decision on the demodulated symbols, and obtains the group key; each edge node decrypts the paired key ciphertext using the average radiation pattern coefficients and the demodulated symbols to obtain the paired key.