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Públio M. Lima
Departamento de Automação e Sistemas, Universidade Federal de Santa Catarina, Campus Trindade, Florianópolis, 88.040-900, SC
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Carlos K. P. da Silva
COPPE - Programa de Engenharia Elétrica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, 21.945-970, RJ
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Claudio M. de Farias
COPPE - Programa de Engenharia de Sistemas e Computação, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, 21.945-970, RJ
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Lilian K. Carvalho
COPPE - Programa de Engenharia Elétrica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, 21.945-970, RJ
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Marcos V. Moreira
COPPE - Programa de Engenharia Elétrica, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, 21.945-970, RJ
Keywords:
Cyber Security, Cryptography, Discrete-Event Systems, Automation networks, Stream ciphers
Abstract
With the advance of the Industry 4.0, it is critical to ensure security against cyber attacks even in the field level of the industry. In this paper, we consider cyber attacks in automation networks, where an attacker eavesdrops communication channels in order to gather information about the system behavior. We propose a cryptographic scheme used in the application layer of the network which encrypt events without altering the size or structure of the transmitted data. This scheme is denoted by event-based cryptography, where an event is defined as any change in the binary vector transmitted in the network. In order to do so, we propose the use of a cryptography scheme called ChaCha20, which is known to have a high resistance to cryptanalysis.
