Abstract
The number of Electronic Control Units (ECUs) installed in vehicles is increasing owing to the implementation of automatic driving functions or advanced driver assistance systems. Moreover, the scale of software in the vehicle is becoming larger and more complicated. Therefore, the number of recalls caused by software is increasing. Furthermore, vehicles could be the targets of cyberattacks when connected cars become popular. Vehicles need their ECU software to be updated in order to fix bugs and implement countermeasures against threats. In this study, we propose an in-vehicle ECU software updating protocol and evaluate its updating time.
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