The convergence of automobiles and ICT (information and communication technology) has become a new paradigm for the\ndevelopment of next-generation vehicles. In particular, connected cars represent themost in-demand automobile-ICTconvergence\ntechnology. With the development of 5G technology, communication between vehicle and external device using autonomous\ndriving and Internet of things (IoT) technology has been remarkably developed. Control of vehicles using smart phones has\nbecome a routine feature, and over 200 Android apps are in use. However, Android apps are easy to tamper by repackaging\nand allowing hackers to attack vehicles with using this vulnerability, which can lead to life-critical accidents. In this study, we\nanalyze the vulnerabilities of connected car environments when connecting with IoT technologies and demonstrate the possibility\nof cyberattack by performing attack experiments using real cars and repackaging for commercial apps. Furthermore, we propose\na realistic security technology as a countermeasure to attain safety against cyberattacks. To evaluate the safety of the proposed\nmethod, a security module is developed and a performance evaluation is conducted on an actual vehicle.
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