Message Authentication Mechanism and Privacy Protection in the Context of Vehicular Ad Hoc Networks

Table 8

Performance analysis.

Property	Method
	[12]	[13]	[14]	[15]	Proposed method
The broadcast message	Signing: Verification	Signing: Verification	Signing: Verification	Signing: Verification	Signing; Verification
Spending time	36.4 ms	18 ms	11.1 ms	18 ms	10.8 ms
The length of ciphertext	1112 bits	480 bits	480 bits	() + 320 bits	480 bits
Handoff		N/A			2 * SE + 2 * SD
Spending time	13.5 ms	N/A	11.4 ms	3 ms	<9.68 ms
The length of ciphertext	480 bits	N/A	1280 bits	bits	2048 bits
Communication between different RSUs	Signing: Verification	Signing: Verification	Signing: Verification	Signing: Verification	Signing; Verification
Spending time	36.4 ms	18 ms	11.1 ms	18 ms	15.9 ms
The length of ciphertext	1112 bits	480 bits	480 bits	(160 * 160) + 320 bits	960 bits
Privacy communicate	N/A	N/A	N/A	N/A	Signing; + SE; Verification; + SD
Spending time	N/A	N/A	N/A	N/A	<13.84 ms
The length of ciphertext	N/A	N/A	N/A	N/A	1024 bits