Signature algorithm for preventing large-batch data from being tampered in Internet of Vehicles

Abstract

The invention discloses a signature algorithm for preventing large-batch data from being tampered in the Internet of Vehicles. The algorithm adopts a combination of a chain storage structure, a hash digest algorithm and the CBC-MAC algorithm to perform tamper-proof protection on large-batch data, such as vehicle speed, GPS and the like, which are stored locally in the Internet of Vehicles and generated periodically. According to the algorithm, batch data is stored in different files according to data generation time, and the files are connected through a text data signature algorithm to realize a chain storage structure; and the data frames are connected in the same file through a non-text-head signature algorithm. According to the algorithm, AES encryption operation is added to avoid therisk of packet replacement attacks; moreover, the algorithm only needs to perform AES and SHA256 once, and the calculation speed is superior to that of the CBC-MAC. Through the algorithm, no matter whether an attacker deletes the previous data or modifies the content of the previous data, the data can be detected through signature check of the group of data. By means of the algorithm, tamper-proofsignature and authentication of the original data frame can be achieved, and higher safety and higher calculation efficiency are achieved.

Description

technical field [0001] The invention relates to the field of Internet of Vehicles data security, in particular to a signature algorithm aimed at preventing tampering of large quantities of data in the Internet of Vehicles. Background technique [0002] Compared with the transmission of real-time generated data, the authenticator and the signer of the large-scale data stored locally in the Internet of Vehicles are the same, that is, they are all completed by the on-board recording device, so the signature of historical data can be completed by the private key of the device. Only owned by this device. [0003] In addition, the historical record data is generally generated in a certain period, and because the engine may be turned off during the driving process and the vehicle may be powered off, the on-board recording device cannot predict the end of the recording, so the device needs to separately record each set of data generated sign. Since the recording cycle of such data...

AI Technical Summary

Problems solved by technology

[0004] When a related Internet of Vehicles application (such as a traffic police accident identification application) requires the vehicle to transmit such data, it generally specifies a complete time period of recorded data for one-time transmission, that is, if the application requires the vehicle's recorded data for a certain hour, the vehicle device needs to Before transmission, the 18,000 pieces of data in this hour are checked against tampering. If it is done through the CBC-MAC algorithm, it will be very time-consuming. In addition, the device needs to check the integrity of the overall recorded data to ensure the integrity of the records. The data group as a whole is complete, there is no deleted data, and CBC-MAC cannot complete the record

Images