The significant test confronted by remote sensor systems is security. On account of dynamic and cooperative nature of sensor systems the associated sensor gadgets makes the system unusable. To comprehend this issue, a trust model is required to discover pernicious, narrow minded and traded off insiders by assessing trust value sensors from the system. It bolsters the choice making forms in remote sensor systems, for example, pre key-dispersion, group head determination, information conglomeration, steering and self-reconfiguration of sensor hubs. This paper examined the sorts of trust model, trust measurements used to address assaults by checking certain conduct of system. It depicts the real outline issues and their countermeasures of building trust model. It additionally talks about existing trust models utilized as a part of different choice making procedure of remote sensor systems.