CAN-MAID: An Intrusion Detection Protocol for CAN Bus

Contemporary research has identified a variety of vulnerabilities and exploits targeting automobiles that exploit the controller area network (CAN) bus. Furthermore, physical unclonable functions (PUF) can be used to fingerprint devices and generate unique secret keys. The use of common hardware such as SRAM can enable PUFs to be developed even on lowend devices. We propose a Controller Area Network Message Authenticating Intrusion Detection system (CAN-MAID) as a security protocol capable of being retrofitted onto preexisting vehicles. CAN-MAID can be used to detect illegitimate messages sent on the CAN bus and be supplemented with other modern countermeasures to improve security according to the computational capabilities of in-car computers.