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Physical layer data encryption using two-level constellation masking in 3D-CAP-PON
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DOI：10.3788/COL202119.010601.png)
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Abstract
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A novel physical layer data encryption scheme using two-level constellation masking in three-dimensional (3D) carrier-less amplitude and phase modulation (CAP) passive optical network (PON) is proposed in this Letter. The chaotic sequence generated by Chua's circuit model realizes two-level encryption of displacement masking and constellation rotation for 3D constellations. We successfully conduct an experiment demonstrating 8.7 Gb/s 3D-CAP-8 data transmission over 25 km standard single-mode fiber. With two-level constellation masking, a key space size of 2.1 x 10(85) is achieved to bring about high security and good encryption performance, suggesting broad application prospects in future short-range secure communications.
Keywords:
physical layer data encryption
constellation masking
carrier-less amplitude and phase modulation
passive optical network
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