Microcontroller based cryptosystem with Key Generation Unit

The embedded based applications need sensitive data transfer between different nodes. In order to increase the speed and to reduce the hardware complexity, this proposed system focuses on the light weight security algorithm Tiny Encryption Algorithm TEA which can be implemented in microcontroller to adapt with many real time constraints such as memory, data loss and low cost. The additive feature of this proposed system is that it uses Key Generation Unit (KGU) to produce the random key to make it optimal for sensitive data transfer in many real-time applications. This above work uses microcontroller and the performances of this cryptosystem is analyzed by implementing the cryptographic algorithm TEA with key generation unit. The key generation unit uses the timers in microcontroller to generate the random bits. The work extends with implementing the two different modes of communication serial (UART) and wireless transmission (RF) to transfer the data from encryption unit to decryption unit.