Propagation of Optical Signals Encrypted with Spectral Phase Encoding and Signal/Polarisation Shuffling

• Main Author: De Lima Cassiano Pereira, João Pedro [UNESP]
• Publication Date: 2024
• Other Authors: Nogueira, Marcelo Pereira [UNESP], De Mello Fagotto, Eric Alberto, Aldaya, Ivan [UNESP], Abbade, Marcelo Luís Francisco [UNESP]
• Format: Conference object
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1109/ICTON62926.2024.10647852; https://hdl.handle.net/11449/306976
• topic: Network security; optical communications; signal cryptography

Non-intrusive tapping and other threats have underscored the necessity for enhanced security mechanisms in transparent optical networks (TONs). In this work, we explore the application of both intra- and inter-signal cryptography techniques to secure TON signals. The intra-signal approach utilizes spectral phase encoding, while the inter-signal technique relies on shuffling the samples among different signals, including the X - and Y polarisation components of each signal. Computer simulation results suggest that encrypted 448 Gb/s dual polarisation (DP) 16-quadrature amplitude modulation (QAM) signals may be properly recovered after ∼ 700 km of standard single-mode fiber propagation.