The wireless sensor networks played substantial role in many fields such as pollution monitoring system, health care system, military operations system, agriculture industries, bridges monitoring, and wastewater treatment systems. Various types of data are exchanged via these networks which can be exploited by intruders or unauthorized users. Hence, there is a demand to protect the data confidentiality in these networks. The cipher algorithms can be used to protect the data confidentiality in these networks. This research presents some applications of wireless networks. Moreover, the research focused on study some cipher algorithms and different features of these ciphers. In this context, the encryption keys, input block, encryption process, and components of these algorithms have been covered. Thus, these cipher algorithms can provide suitable level of protection for the WSN networks.