3results about How to "Increase attack difficulty" patented technology

This invention discloses a method for updating a vehicle-mounted ECU security key and a computer storage medium. The method includes: an upper-level computer using the ECU's public key to perform asymmetric encryption on a business key to obtain ciphertext; signing the ciphertext using the upper-level computer's private key; concatenating and packaging the ciphertext, signature, and upper-level computer public key and sending it to the ECU; the ECU unpacking the received data to obtain the ciphertext, signature, and upper-level computer public key; verifying the upper-level computer public key; if the verification is successful, verifying the signature using the upper-level computer public key; if the signature verification is successful, decrypting the ciphertext using the ECU's private key; updating the vehicle-mounted ECU security key based on the decryption result; if either the upper-level computer public key or signature verification fails, sending a key update failure message to the upper-level computer and ending the ciphertext update. This invention features a simple algorithm and avoids the risk of brute-force key reading at the ECU, thus improving the security of in-vehicle terminal information.

The present application relates to the technical field of mobile communication, and provides a kind of internet of things equipment control method and device.The method comprises: the first cloud platform receives the information that target device enters target state sent by second cloud platform;Information is used to indicate that specified operation is carried out on target device;The first cloud platform receives the operation credentials of target device generated by second cloud platform;Operation credentials are generated in the case where second cloud platform confirms that specified operation is completed;The first cloud platform sends control instruction for controlling target device to second cloud platform according to access token and operation credentials;Target device is the device registered on second cloud platform;Access token is obtained in advance by the first cloud platform in second cloud platform.The internet of things equipment control method and device provided by the present application, operation credentials of device are generated only after user carries out corresponding operation on device, and device can be controlled according to operation credentials, which increases attack difficulty and improves the security of cross-platform control internet of things equipment.

The application discloses a GNSS anti-spoofing method and system for multi-constellation ionospheric delay adaptive detection, and belongs to the technical field of satellite navigation. The method comprises the following steps: extracting effective dual-frequency pseudorange data in different constellations from observation data according to signal types; calculating ionospheric delay values of each satellite in each constellation based on preset frequency ratio factors of each constellation; assigning a sliding window buffer to each satellite, dynamically generating a detection threshold interval; judging the signal abnormal state of the current satellite, and counting the number of continuous abnormalities to obtain a single-satellite abnormality preliminary determination result; based on the single-satellite abnormality preliminary determination result, counting the proportion of abnormal satellites in each constellation and the number of continuous abnormalities of each satellite, performing global abnormality judgment, and generating an alarm information when the judgment is triggered. The application improves the robustness, environmental adaptability and reliability of GNSS anti-spoofing detection through multi-constellation joint detection, sliding window adaptive threshold and abnormal value filtering mechanism, and does not need to increase the hardware cost.