Avaliação de algoritmos de criptografia e implementação de um protocolo leve para troca de chaves em dispositivos IoT

Abstract

Ensuring security in Internet of Things (IoT) has proved to be a great challenge, mainly due to the heterogeneity, low computational power and energy consumption of its devices. In this context, the cryptography is responsible for providing confidentiality, integrity and authentication. This work is about information security, focused on cryptography algorithms for the IoT domain. The goal is to evaluate the performance of different cryptography algorithms on IoT devices, including the state of art, and to implement a key exchange protocol. The algorithm evaluation measured execution time, memory usage and power consumption. The protocol employs the Elliptic Curve Diffie-Hellman (ECDH) key exchange algorithm x25519 and is designed from the cryptography algorithms evaluated. The algorithms are evaluated on the Arduino Uno, ESP32 and Raspberry Pi 3. Results show that it is possible to ensure confidentiality and integrity in IoT devices without compromising its performance. The proposed protocol was successfully applied for a key exchange in IoT devices with minimal computational power.