The long lifespan of automotive systems demands that current and future threats are considered during the design of automotive security. The foreseeable breakthrough of quantum computers represents a risk for the automotive communication. Thus, the integration of Post-Quantum Cryptography (PQC) is mandatory. Lattice-based PQC is an attractive alternative for securing automotive systems because it has a good trade-off between performance and key sizes. In this work, we integrate the post-quantum public-key encryption and key encapsulation scheme ThreeBears into a microcontroller specially designed for the automotive industry. Moreover, we apply optimization techniques on algorithmic and implementation level. Results show that choosing a more powerful Error Correcting Code (ECC) for ThreeBears achieves a failure rate decrease from 2􀀀135 to 2􀀀153 and, alternatively, an increase of the security level from 2141 to 2144. The proposed optimization techniques on implementation level can lead to a performance improvement of 55.98 %.     «

The long lifespan of automotive systems demands that current and future threats are considered during the design of automotive security. The foreseeable breakthrough of quantum computers represents a risk for the automotive communication. Thus, the integration of Post-Quantum Cryptography (PQC) is mandatory. Lattice-based PQC is an attractive alternative for securing automotive systems because it has a good trade-off between performance and key sizes. In this work, we integrate the post-quantum...     »