Data aggregation in wireless sensor networks eliminates redundancy to improve bandwidth utilization and energy-efficiency of sensor nodes. This paper presents a secure energy-efficient data aggregation protocol called ESPDA (Energy-Efficient Secure Pattern based Data Aggregation). Unlike conventional data aggregation techniques, ESPDA prevents the redundant data transmission from sensor nodes t...

This paper proposes a channel access control scheme fit to dense acoustic sensor nodes in a sensor network. In the considered scenario, multiple acoustic sensor nodes within communication range of a cluster head are grouped into clusters. Acoustic sensor nodes in a cluster detect acoustic signals and convert them into electric signals (packets). Detection by acoustic sensors can be executed per...

ChipCon radio is the radio chip that has been used recently for wireless sensors in Berkeley NEST group. ChipCon radio generates an analog signal indicating the signal strength of the received data bits and we used this signal strength as a tool for localizing sensor nodes. We modified the network stack of DOT3 sensor nodes to make the signal strength available. Experiments showed that the sign...

We aim to preserve the large amount of data generated inside base station-less sensor networks with minimum energy cost, while considering that sensor nodes are selfish. Previous research assumed that all the sensor nodes are cooperative and designed a centralized minimumcost flow solution. However, in a distributed setting wherein energyand storage-constrained sensor nodes are under different ...

In this paper, we address the Authenticated Key Agreement(AKA) between actor and sensor nodes in Wireless Sensor and Actor Network (WSAN). We propose DoS-resilient AKA scheme between Actor and Sensor nodes in WSAN. The proposed scheme utilizes the IDbased cyrptosystem to reduce a need to transmit public-key certificates. The proposed scheme is resilient against the Denial of Service (DoS) attac...