“…Generally, most of the routing protocols' primary focus is to attain power conservation in WSNs [15]- [18]. With regards, some of them focused on the energy-efficient routing protocol [19]- [21], energy-efficient cluster-based routing protocol [22]- [25], trust with key management based routing system for achieving high security [26], [27], and optimization based routing technique with security [28]- [31]. The summary of these methods is discussed as follows.…”