Advanced AES Algorithm Using Dynamic Key in the Internet of Things System

Data security is very important in the Internet of things (IoT) systems. There are many proposed security methods and algorithms such as SHA (Secure Hash Algorithm), MD5 (Message-Digest Algorithm 5), AES (Advanced Encryption Standard) etc. The AES is one of the most common algorithms between them. It includes many steps such as AddRoundkey, SubBytes, ShiftRows, and MixColum. However, the conventional AES algorithm generates fixed keys for encrypting, which are shared between sender and receiver. Therefore, the key is easily stolen. In this paper, we propose the advanced AES algorithm which generates dynamic keys. Here, 16 bytes data frame is transmitted sequentially and indexed according to a numerical order. Based on the order of this sequence, the key is changed dynamically with encrypted data in a car tracking system as an example in the IoT (Internet of Things) systems.