Design a secure TWDM-PON via the Hill cipher algorithm

With a rapid increase in demand for critical network functions, security concerns in optical access networks are becoming more pressing. This issue is addressed by a passive optical network (TWDM-PON) technology that takes advantage of time-wavelength division multiplexing. Both the transmitter and the receiver use image ciphering and deciphering. The Hill cipher method has been developed using Opti-System software and MATLAB programming. Based on modeling results, it is possible to efficiently establish a 40 km bidirectional optical fiber link with a 1:256 separation rate at a maximum BER level of roughly 10 −9 and a minimum acceptable quality factor of 6. A minimum permitted reception sensitivity of -34.3 dBm for uplink and -31.9 dBm for downlink has been attained with a symmetric high capacity of 160 Gb/s rate. Examining numerous security studies, key space, correlations, and histogram analysis have all been used to assess the suggested encryption algorithms' efficacy.