Trust and its association are thrilling fields of research. The affluent works producing concerning belief gives us a forceful indication that this is a vital span of research. Belief as a believed has a expansive collection of adaptations and requests, that reasons divergence in belief association terminology. The aim of this paper is to furnish VANETs designers alongside several perspectives on the believed of belief, an understanding of the properties that ought to be believed in growing a belief metric, and visions on how belief can be computed. We commenced this paper by giving assorted definitions of belief and metrics utilized for assessing trust. We next gave a comprehensive survey of assorted belief computing ways, their comparisons alongside respect to assorted attack models and computational requirements. We analyzed assorted literatures on the belief dynamics such as belief propagation, aggregation and predictions. In the end we have endowed a serving detailing the request of belief mechanisms in security. The belief schemes gave in this discover cover an expansive scope of request and are established on countless disparate kinds of mechanisms. There is no solitary resolution that will be suitable in all contexts and applications. As arranging a new belief arrangement, it is vital to ponder the constraints and the kind of data that can be utilized as input by the network. A finished observation is that so distant, the continuing scutiny work and propositions lack completeness. There are vital subjects yet to be addressed.