Romanian Journal of Information Science and Technology (ROMJIST)

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ROMJIST is a publication of Romanian Academy,
Section for Information Science and Technology

Editor – in – Chief:
Academician Dan Dascalu

Secretariate (office):
Adriana Neagu
Adress for correspondence: romjist@nano-link.net (after 1st of January, 2019)

Editing of the printed version: Mihaela Marian (Publishing House of the Romanian Academy, Bucharest)

Technical editor
of the on-line version:
Lucian Milea (University POLITEHNICA of Bucharest)

Sponsors:
• National Institute for R & D
in Microtechnologies
(IMT Bucharest), www.imt.ro
• Association for Generic
and Industrial Technologies (ASTEGI), www.astegi.ro

ROMJIST Volume 22, No. 3-4, 2019, pp. 228-243, Paper no. 630/2019
 

Murugesan LAKSHMANAN and Senthil Kumar NATARAJAN
Security enhancement in In-vehicle Controller Area Networks by Electronic Control Unit authentication

ABSTRACT: Controller Area Network (CAN), the most popular network of Electronic Control Units (ECUs) was designed by Bosch in 1990s to prioritize reliability and safety but with absence of security. An attacker can take control of the ECUs and probably harm the safety critical operations inside the vehicle. Hence, security especially ECU authentication is most important for CAN. In this paper, an ECU authentication scheme named Security Enhancement using Truncated Message Authentication Code (SETMAC) for CAN is proposed. The authentication code generated using International Data Encryption Algorithm (IDEA) is truncated to four bytes to accommodate the message data into the maximum payload size of eight bytes. 8-bit message counter is incorporated among the ECUs to provide opposition to replay attacks. The proposed algorithm avoids the need of an extra frame for sending authentication messages and thus effectively reduces the bus load. The algorithm is tested with CANoe software using the CAN data set captured from a real vehicle. The simulation results show that the proposed authentication algorithm can be implemented in existing real time CAN bus networks in 500kb/s and 1Mb/s bit rates at maximum busloads of 25.05% and 12.52% respectively.

KEYWORDS: Authentication, Security, Electronic Control Unit, Encryption, In-vehicle network, Controller Area Network, International Data Encryption Algorithm

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