On Post-Quantum Attribute-Based Encryption for Automotive Over-the-Air Software Updates

Attribute-Based Encryption (ABE) has been proposed to ensure the confidentiality of over-the-air (OTA) software updates in the automotive sector. Existing schemes predominantly rely on pairing-based cryptography, which is vulnerable to quantum computing attacks. This paper explores an ABE scheme based on Ring Learning with Errors (RLWE), a quantum-resistant cryptographic primitive. We implement a prototype on an embedded platform to assess the scheme's performance in terms of processing time and memory usage on the vehicle side. Results indicate that the RLWE-based ABE scheme can be efficiently integrated into OTA update frameworks with minimal performance overhead.