Abstract: Vehicular Ad hoc Networks (VANETs) are the hopeful approach to offer safety and other applications to the drivers and customers. A lot of works have been completed towards it but security in VANET is still challenging. Data dissemination is the basic process in vehicular ad hoc networks (VANETs). Data dissemination is used to improve the quality of driving in terms of time, distance and safety. That is, after an accident or jamming is identified by the corresponding sensors build up on the vehicles, an alert message should be quickly disseminated to the vehicles moving towards the affected areas. The limited characteristics of VANETs are high mobility of vehicles, alternating connectivity, and dynamic topology. These following characteristics make data propagation tricky. In this paper, a survey on trust based data dissemination for VANETs is presented. This paper provides a detailed idea about how to securely disseminate the message between vehicles within a time.

Keywords: Vehicular ad hoc networks, Data dissemination, Epidemic routing, VADD.