BusCount: A Provable Replay Protection Solution for Automotive CAN Networks

Table 1

Comparison of different authentication approaches for CAN-Bus (HW: Hardware, SW: Software, C : Counter, T : Timestamp, N : Nonce, : not described)

	HW change	SW change	Central component	Freshness technique	MAC	Encryption	Transfer techniques for MAC	Syncronisation of freshness value
AUTOSAR [2]	-	✓	-	C / T	✓	-	28 bit data field	✓
CaCAN [24]	✓	✓	✓	C	✓	-	8 bit data field	-
CANAuth [35]	✓	✓	-	C	✓	-	CAN+	(✓)
Groll et al. [14]	-	✓	✓	C	✓	✓		-
LeiA [31]	-	✓	-	C	✓	-	sep. message	✓
LibrA-CAN [16]	-	✓	✓	C	✓	-	CAN+	-
Lin et al. [25]	-	✓	-	C	✓	-		(✓)
Ueda et al. [34]	✓	✓	✓	C	✓	-	8 bit data field	-
VeCure [37]	-	✓	-	C	✓	-	separate message	-
MaCAN [20]	-	✓	✓	T	✓	-	32 bit data field	✓
VatiCAN [28]	-	✓	✓	C + N	✓	-	separate message	✓
vulCAN [7]	✓	✓	✓	C + N	✓	-	separate message	(✓)
Woo et al. [38]	-	(✓)	(✓)	key refresh	✓	✓	CAN-FD	-
LCAP [21]	-	✓	-	hash chain	-	✓	16 bit extended ID	✓
TouCAN [3]	-	✓	-	-	✓	✓	24 bit data field	-
Siddiqui et al. [33]	✓	✓	✓	-	✓	✓	data field	-
CAN-TORO [15]	✓	✓	✓	Authenticated ID	-	-	-	(✓)