Efficient Certificateless Conditional Privacy-Preserving Authentication Scheme in VANETs

Table 2

Security comparisons.

Security	[22]	[25]	[27]	[30]	[31]	The proposed scheme
Message authentication	✔	✔	✔	✘	✔	✔
Identity privacy preserving	✔	✔	✔	✔	✔	✔
Traceability	✔	✔	✔	✔	✔	✔
Unlinkability	✔	✔	✔	✔	✔	✔
Role separation	✘	✘	✘	✔	✔	✔
Key escrow resilience	✘	✘	✘	✔	✔	✔
Resistance to replay attack	✔	✔	✔	✔	✔	✔
Resistance to modification attack	✔	✔	✔	✘	✔	✔
Resistance to impersonation attack	✔	✔	✔	✘	✔	✔
Resistance to man-in-the-middle attack	✔	✔	✔	✘	✔	✔