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AlphaEta™ Encryption Implementation

Technical Implementation:

There are many ways to implement the AlphaEta™ encryption protocol. As an example, we describe here a phase-modulated implementation. After decryption, this system is essentially the same as the emerging differential phase shift keyed (DPSK) modulation method. As shown in the figure below, the encrypted channel is modulated by a phase modulator, and afterwards sent into a traditional optical multiplexer (Mux) to combine it with the other dense wavelength division multiplexers (DWDM) optical channels in the system. The encrypted channel is thus "drop-in" compatible with the available infrastructure.

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