Fast Implementation of the Advanced Encryption Standard Using Atmega1281

In recent years, wireless sensor network technology has been frequently used in various fields, thereby making it increasingly important to ensure that the data being transferred remains confidential. Symmetric-key cryptography, which does not require high computing capacity, is a method that is generally used because the computing and memory requirements of sensor nodes are low. An implementation of symmetric-key cryptography is needed in order to achieve high-speed processing of sensor nodes. In this paper, we propose and evaluate a fast implementation scheme of the Advanced Encryption Standard using an inline-assembler that is suitable for the ATmega1281 microcontroller. This microcontroller is a part of the Atmel AVR series and is often equipped with sensor nodes for use in wireless sensor networks.