Currently, wireless sensor networks (WSNs) are formed by devices with limited resources and limited
power energy availability. Thanks to their cost effectiveness, flexibility, and ease of deployment, wireless
sensor networks have been applied to many scenarios such as industrial, civil, and military applications. For
many applications, security is a primary issue, but this produces an extra energy cost. Thus, in real
applications, a trade-off is required between the security level and energy consumption. This paper
evaluates different security schemes applied to human tracking applications, based on a real-case scenario.Junta de Andalucía P07-TIC-02476Junta de Andalucía TIC-570
