Security-Aware Design for Cyber-Physical Systems by Chung-Wei Lin & Alberto Sangiovanni-Vincentelli

Author:Chung-Wei Lin & Alberto Sangiovanni-Vincentelli
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

5.4 Experimental Results

A test case in previous work was obtained [59]. The test case supports advanced distributed functions with end-to-end computations collecting data from 360 sensors to the actuators, consisting of the throttle, brake and steering subsystems and of advanced Human-Machine Interface devices. The architecture platform consists of 9 ECUs connected through a single CAN [3] or CAN-FD [4] bus with the speed 500 kbps. The functional model consists of 41 tasks and 83 signals. For the safety requirements, 171 paths are selected with deadlines 300 or 100 ms. For the security requirements, 50 signals are selected with required MAC lengths ranging from 10 to 30 bits for CAN and from 64 to 128 bits for CAN-FD (with longer message length, CAN-FD is able to provide more MAC bits and therefore more secure communications). The maximum allowed security risk of each signal is simplified so that no more than 2 ECUs can be assigned to the same receiving group, i.e., in Eq. (5.16). The program is implemented in C/C. CPLEX 12.5 is used as the MILP solver. The experiments are run on a 2.5-GHz processor with 4 GB RAM. The MILP-based algorithm is compared with a greedy heuristic and non-integrated approaches applying the pair-wise key distribution and the one-key-for-all key distribution.

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