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Tim Fritzmann, Jonas Vith, Johanna Sepúlveda

• The high degree of automation demanded in the automotive industry has turned vehicles into powerful mobile computing platforms. Various types of data are collected, distributed and processed. Some of the processed information is sensitive and safety critical. Thus, secure encrypted communication is a new and increasing requirement in automotive systems. The extremely long lifespan of vehicles leads to the necessity of employing cryptography that is also resistant against future attacks. The skyrocketing evolution of quantum computers in particular poses a significant threat to such a systems, thus it is also important to consider quantum attacks in automotive environments. To ensure longterm automotive security, able to resist traditional and quantum attacks, we propose the first post-quantum cryptography implementation on the Infineon AURIX microcontroller, which was specially designed to fulfill the performance and safety requirements of safety-critical applications. AURIX is currently widely deployed in the automotive sector. Our implementation shows that it is feasible to integrate post-quantum cryptography in automotive applications. Moreover, we show that optimization techniques can lead to a speed improvement of approximately 10.2%. This can be specially important for real-time applications.