Data dissemination is important concept in wireless sensor networks (WSN). In this paper, we propose a secure and energy efficient data dissemination protocol for WSN. A routing metric is defined to choose the best route from the available routes. This metric guides those routes to be chosen that consume less energy. Moreover, for secure data dissemination, a session key is established between different parties to be communicated. This session key is then used for secure communication among nodes for data dissemination. The performance of proposed protocol is evaluated using NS-2 simulator with respect to the metrics like control overhead, network lifetime, and throughput. It is found that the proposed protocol is quite effective in comparison to the existing protocols with respect to these metrics.