Wireless sensor network (WSN) application is an emerging industry in the field of computer technology. WSN application plays a commercial role in different domains, such as military surveillance targeting, area monitoring, health care monitoring, environmental sensing, and data center monitoring. However, these applications face various problems, such as the lack of security protocols within devices as well as data transmission and communication issues in between sensors. That's why, in the current age, security is the focus of many works, and constructing powerful security protocols is very challenging. Researchers currently focus on user's confidentiality in WSNs environments to analyze problems using various approaches, claiming data security is the most salient concern for unauthorized entities. So, A WSN is a superior type of communication network because it shares data in special manners during the deployment of sensor nodes. Certain characteristics are unique to it. Secret sharing scheme is one of the most innovative and powerful schemes in the modern era of the cryptographic world, which consists of two basic parts, namely, distribution and reconstruction Unceremoniously, Secret Sharing Scheme is working on a unique player called dealer which contains the smallest size of every participant shared secret information. It is a very significant aspect when they distribute the secret, and it would be a small size of the share as needed for the energy-constrained WSNs under the comprehensive security application. Therefore, we presented a theoretically secure, novel secret sharing scheme (SSS) for WSN applications, especially for key transfer protocol.