Vehicle Security: Post-Quantum Security to the CAN Network


This new technical paper titled “PUF-Based Post-Quantum CAN-FD Framework for Vehicular Security” is published by researchers at University of Tennessee.

“The Controller Area Network (CAN) is a bus protocol widely used in Electronic control Units (ECUs) to communicate between various subsystems in vehicles. Insecure CAN networks can allow attackers to control information between vital vehicular subsystems. As vehicles can have lifespans of multiple decades, post-quantum cryptosystems are essential for protecting the vehicle communication systems from quantum attacks. However, standard CAN’s efficiency and payload sizes are too small for post-quantum cryptography. The Controller Area Network Flexible Data-Rate (CAN-FD) is an updated protocol for CAN that increases transmission speeds and maximum payload size. With CAN-FD, higher security standards, such as post-quantum, can be utilized without severely impacting performance. In this paper, we propose PUF-Based Post-Quantum Cryptographic CAN-FD Framework, or PUF-PQC-CANFD. Our framework provides post-quantum security to the CAN network while transmitting and storing less information than other existing pre-quantum and post-quantum CAN frameworks. Our proposal protects against most cryptographic-based attacks while transmitting (at up to 100 ECUs) 25–94% less messages than existing pre-quantum frameworks and 99% less messages than existing post-quantum frameworks. PUF-PQC-CANFD is optimized for smaller post-quantum key sizes, storage requirements, and transmitted information to minimize the impact on resource-restricted ECUs.”

Find the technical paper here. Published August 2022.

Cultice, T.; Thapliyal, H. PUF-Based Post-Quantum CAN-FD Framework for Vehicular Security. Information 2022, 13, 382. https://doi.org/10.3390/info13080382.

PUF-Based Post-Quantum Cryptographic CAN-FD Framework’s generalized structure. SIDH key exchange is used to authenticate and transmit session keys that are then used by ECUs for normal node-to-node traffic encryption. All information is transmitted over a single CAN bus. Source: “PUF-Based Post-Quantum CAN-FD Framework for Vehicular Security”


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