A Secure Incentive Scheme for Vehicular Delay Tolerant Networks Using Cryptocurrency

Table 3

Comparison of the characteristics of the proposed system with the previous systems.

	Lee et al. [3]	Zhu et al. [15]	Lu et al. [16]	proposed
network service	simple broadcast	dtn	dtn	vdtn
trust model	centralized authority	centralized virtual bank (VB)	centralized (VB)	distributed (blockchain)
fault tolerance	weak	weak	weak	strong
fairness	escrow held by the authority	escrow held by the VB	escrow held by the VB	multisig and timelock script on a blockchain
incentive means	virtual coin, application dependent	virtual coin, application dependent	reputation, virtual coin, application dependent	Bitcoin, worldwide
payment contract	signed receipt by a receiver	layered credits by sender, forwarder, receiver in sequence	layered credits	Bitcoin transaction script
rewarding	exchange receipt to virtual cash through the authority	credit clearance through the VB	credit clearance through the VB	Bitcoin payment
identity	certificate	certificate	certificate	Bitcoin public key (address)
anonymity	low	n/a	n/a	medium