PSK Y-00 Quantum Stream Cipher with 217 Levels Enabled by Coarse-to-Fine Modulation Using Cascaded Phase Modulators
Ken Tanizawa, Fumio Futami · 2018
We propose coarse-to-fine phase modulation for Y-00 quantum stream cipher that employs extremely high-order PSK modulation for signal masking by quantum noise. Encryption with a record-high 217phase levels and penalty-less digital-coherent decryption are demonstrated at 10 Gbaud.