We quickly approach a future where Internet of Things (IoT) devices are the norm. In this scenario, humans are surrounded by a multitude of heterogeneous devices that assist them in almost every aspect of their daily routines. The realization of this future demands strong authentication guarantees to ensure that these devices are not abused and that their users are not endangered. However, providing authentication for these systems is challenging due to the high heterogeneity of IoT applications. In this paper, we first review several IoT application scenarios and promising authentication methods for each. We identify th e key characteristics of each IoT application scenario, present the strengths and weaknesses of prominent authentication methods from the literature, and review which authentication methods have been proposed in the literature for each application. Then, we present a novel authentication method for IoT based on electromagnetic noise. The key advantage of electromagnetic noise is that any electronic device intrinsically generates electromagnetic noise during normal operation. We extract features from these electromagnetic emanations and use machine learning algorithms to identify devices based on these features. Our method achieves 77% accuracy when identifying devices among a set of seven devices.
O crescente uso de dispositivos inteligentes traz preocupações quanto a segurança das informações trocadas. Métodos de Autenticação nos permitem verificar a procedência de uma mensagem. Um método utilizado para autenticar uma mensagem é utilizar a assinatura digital do dispositivo. Da mesma forma que os seres humanos possuem características que permitem distinguir uma pessoa de outra, dispositivos eletrônicos possuem diferenças provindas do processo de manufatura. Quando um dispositivo eletrônico é utilizado para gerar algum tipo de mídia, as diferenças podem ser vistas no resultado. Essas características vistas no sinal gerado podem ser utilizadas para extrair uma assinatura digital. Nesse trabalho Arduinos, dispositivos típicos de IoT, foram utilizados para gerar um sinal que foi observado por um rádio e estudado com o intuito de encontrar diferenças que poderiam levar à criação de uma assinatura para cada dispositivo e assim, desenvolver um método de autenticação entre dispositivos IoT e um servidor.
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