A New Embedded Encryption Algorithm for Wireless Sensor Networks

The traditional ideas and solutions focusing on network security problems are unsuitable for wireless sensor networks in which storage space and computing power are limited. In order to reduce cost in processor of sensor node, this paper proposes a new embedded encryption algorithm (AEEA) based on linear feedback shift register (LFSR). Because the algorithm is only composed by some basic operations such as the XOR and displacement, FPGA coprocessor with high performance and price ratio is adopted, through which our algorithm can achieve low cost and high speed in FPGA implementation. The experimental results show, compared with other known encryption algorithms for wireless sensor networks, our algorithm has better performance on the whole, in particular the safety performance ratio reaches 0.757, greatly outperforming other algorithms.