关键词：电子信息；信息安全；网络安全；无线传感器；信道攻击
摘 要：The intent of this chapter is to introduce side channel attacks as a significant threat for wireless sensor networks, since in such systems the individual sensor node can be accessed physically and analysed afterwards. Even though such attacks are known for some years, they have never been specifically considered before in the area of WSNs (Wireless Sensor Networks).