Research in Human Sensor Networks (HSN) has become the primary topic, as there is significant development in Health and clinical care technologies. Lightweight encryption algorithms are utilized to guaranteeconfidentiality of the data that is communicated between sensors and servers. EELWE is a lightweight encryption algorithm that will consume less energy compared to the existing algorithms. A metric is needed toanalyze the performance of the lightweight encryption algorithms w.r.t various parameters of a cipher implementation. In this paper, a metric called MSEC (Metric for Security Vs Energy consumption) is used to measure the performance of light weight encryption algorithms. Results have proved that EELWE has exhibited better MSEC value compared to other algorithms.