Traceable and Authenticated Key Negotiations via Blockchain for Vehicular Communications

Table 3

Scheme comparison.

Proposed key negotiations	Lei et al. [9]	Our scheme	Park et al. [2]	Our scheme
	A secure key management within the heterogeneous network	Three key negotiations via blockchain	RSU-based decentralized key negotiation	Three key negotiations via blockchain
Analyze the performance of proposed scheme	✓	✓	✓	✓
Propose optimization algorithms	✕	Three steps to generate a key	Determine the design parameters	Three steps to generate a key
Defend against MITM attacks	✓	✓	✕	✓
Defend against packet-dropping attacks	✓	✓	✕	✓
Defend against decryption failure attacks	✕	✓	✕	✓
Satisfy traceability of key exchange	✓	✓	✕	✓