An Energy-Efficient AES-CCM Implementation for IEEE802.15.4 Wireless Sensor Networks

As the networking technology greatly advanced in past decades, wireless sensor networks (WSN) have been widely deployed and utilized in various areas. Security issues on WSN devices thus draw much attention. In order to ensure the security of IEEE802.15.4 WSN and to fulfill the strict limitations of area and energy, we propose an efficient scheme for AES-CCM architecture. We implement AES-CCM by taking into account the tradeoff among throughput, area and power consumption. Our design employs a full-hardware implementation to offload CPU. Meanwhile, we parallelize CTR and CBC-MAC processing to cut down duty cycles and energy-consumption. An appropriate 8-bit data path AES architecture is chosen to guarantee rigorous requirements of the area and energy. Furthermore, a shared key expansion is applied to reduce the die-size. Experimental results based on the United Microelectronics Corporation (UMC) 0.25 micrometers 1.8 volts technology library show that our implementation is compact and energy-efficient, which would be suitable for resource-constrained WSN devices.