Game Theory Based Trust Model for Cloud Environment

Table 4

Comparison of existing and proposed methods.

S. No	Method	Parameters	Achievements	Observations
1	Hard trust	Security features, interfaces, and service semantics.	Semantics defined for all the key attributes. Considering context level semantics.	Defining semantics for initial provider is a little complex.
2	Metric based trust	Subjective service trust metric, objective service trust metric, and trust rate.	“Services selected and trusted according to their security features, and they are discovered according to their interfaces or semantic descriptions.”	Honesty of service providers at bootstrapping level is evaluated in a lighter sense.
3	Proposed (NEM)	Risk type, application type, belief, and uncertainty.	Considering risk involved with respect to both user and service provider.	Method facilitates mutual agreement at the boot loading level.