The conversion of shoddy remote correspondence, detecting and calculation has created another gathering of savvy gadgets and by utilizing a large number of these sort of gadgets in self-arranging systems has shaped another innovation that is called remote sensor systems (WSNs). WSNs utilize sensor hubs that set in open zones or out in the open spots and with an immense number that makes numerous issues for the analysts and system architect, for giving a proper plan for the remote system. The issues are security, directing of information and preparing of expansive measure of information and so forth. This paper portrays the kinds of WSNs and the conceivable answers for handling the recorded issues and arrangement of numerous different issues. This paper will convey the learning about the WSN and sorts with writing audit so a researcher can get more information about this rising field. For some uses of WSN, security is an imperative prerequisite. Be that as it may, security arrangements in WSN contrast from conventional organizes because of asset confinement and computational imperatives. This paper investigates security arrangements: TinySec, IEEE 802.15.4, Twists, MiniSEC, LSec and LLSP in WSN. The paper additionally introduces qualities, security prerequisites, assaults, encryption calculations, and task modes. This paper is thought to be valuable for security architects in WSNs.