Consider the problems of decision-making and recognizing malicious nodes in traditional node reputation security scheme based on light-weighted cloud model

this paper proposes a Modified Light-weighted Cloud Model (MLCM) firstly

and a novel node reputation security scheme is given by then.In order to resolve trust misjudgment

direct and indirect trust values are treated comprehensively before its calculation with simplified backward cloud operator

on the basis of the traditional approach of wireless sensor network trust management on trust value.In addition

cloud membership function is leveraged to obtain recommendation trust value to improve accuracy of recognizing malicious nodes.The experiment shows that the scheme can not only work out the problem of contradiction between the intrusion tolerance and sensitivity but also figure out matter of decision-making and recognizing malicious nodes.