A New DSP-Based Physical Layer Encryption Technique Applied to Passive Optical Networks
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Data
2018-09-26
Autores
Francisco Abbade, Marcelo Luis [UNESP]
Silva Lessa, Leonardo [UNESP]
Oliveira Santos, Melissa De [UNESP]
Jose Do Prado, Afonso [UNESP]
Aldaya, Ivan [UNESP]
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Resumo
Point-to-multipoint architecture poses serious security problems to passive optical networks (PONs). In this paper, we propose the use of a new digital signal processing (DSP)-based technique to improve the confidentiality of signals traveling through PONs. The technique consists of phase-shifting and delaying the spectral components of baseband signals that further modulate optical carriers. Our simulation analysis encompasses the application of the technique to binary phase-shift keying (BPSK) in an intensity modulated-direct detection (IM-DD) system. Results reveal that the encrypted signals may be properly decoded even when 64 PON users are considered and suggest the potential of the proposed technique for practical implementations. From a security point of view, we show that the proposed technique utterly outperforms the Advanced Encryption Standard (AES) in brute force attacks.
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digital signal processing, passive optical networks, physical layer security
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International Conference on Transparent Optical Networks, v. 2018-July.