TrustyFeer: A Subjective Logic Trust Model for Smart City Peer-to-Peer Federated Clouds

Table 1

Comparison of different trust management systems.

Type	Systems	Environment	Tool used	Trust value evaluation	Performance measured
Peer-based trust systems	EigenTrust [30]	P2P network	P2P simulator	Calculating the sum of positive and negative ratings	Number of inauthentic files
	PeerTrust [37]	Decentralized P2P network	Mathematica 4.0	Normalizing the transaction rating	Trust computation error against malicious behaviors
	PowerTrust [38]	P2P Grid computing	Discrete-event driven simulator	Bayesian theory	Reputation convergence overhead, ranking discrepancy, and aggregation errors
	HonestPeer [35]	P2P network	P2P trust simulator	Calculating the global reputation of other peers	Success rate and the percentage of inauthentic downloads
	CuboidTrust [39]	P2P network	-	Using power iteration	Number of inauthentic resource downloads under various threat models
	BP-P2P [40]	P2P network	MATLAB	Using belief propagation distributed message	Error in the reputation values of peers, the computational complexity, and the communication overhead
	GossipTrust [41]	P2P network	P2P trust simulator	Using gossip protocol	Query success rate
	HFTrust [42]	P2P network	Simulation using Java	Using fuzzy logic	Number of inauthentic files in the system
	VectorTrust [43]	P2P network	VTSim simulator using Netlogo	Using Bellman-Ford-based algorithm	Convergence speed, communication overhead, malicious peer detection rate and detection speed
	TNA-SL [28]	P2P network	-	Using subjective logic	-
	Trust model for reliable file exchange [44]	P2P private cloud	-	Calculating the sum of all metric values multiplied by a given weight	-
	Reputation-based trust model [45]	P2P private cloud	CloudAnalyst environment tool.	Using a mathematical model	Trust rate
	Trust modeling [46]	P2P clouds	PeerSim simulator	Using game theory	Level of trust in terms of trusted and untrusted peers
	Service trust worthiness [47]	Intercloud computing	-	Based on quorum	-
File-based trust systems	Reputation management system [48]	Structured P2P network	-	Using file reputation and peer reputation	Degree of preventing untrustworthy files from spreading compared to existing systems
Hybrid-based trust systems	AuthenticPeer [49]	P2P sensor network	P2P trust simulator	Using [30] for peer quality and [48] for file quality	Success rate and the failure rate of authentic files