Sistema automático para o ajuste de métodos de criptografia de acordo com a disponibilização de recursos para sistemas embarcados

Abstract

The security of computer networks is one of the technological areas with great challenges. With the growing number of loT projects, it is fundamental to provide the security of your devices. However, one of the challenges for developers, engineers and technology adventurers is the limitation of hardware. In this context, this work sought to develop an automatic negotiation system of symmetric cryptographic algorithms that depends on the verification of available resources, such as main memory, processor usage and available level of stored energy on the Client side. Thus, the cryptographic algorithms AES and Chacha20 were used, these types of algorithms are recommended for communication between devices, as they are light, fast and use few resources in their execution, very useful characteristics in an embedded system, according to the literature. This automatic change was defined with the objective of leaving the hardware with a greater performance of its hardware/software and a secure point-to-point communication, therefore providing confidentiality at the application layer. In the final tests, the Orange Pi One platform showed better results with the selected metrics, when compared to the general-purpose computer with automatic encryption switching. It was also possible to observe the high speed committed by the Chacha20 cryptographic algorithm with a higher execution speed than the others analyzed here. However, the reduction of energy consumption has not yet been achieved, but the delivery of messages in a way that guarantees their confidentiality was successfully carried out.