Multidimensional Quantum Key Distribution

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The book explores advanced techniques in Quantum Cryptography, focusing on secure key distribution methods that outperform classical communication. It details the use of optical signal modulation and two detection schemes: Single Side Band (SSB) and Single Side Pulse (SSP), both of which utilize phase differences to enhance security and efficiency. The SSB protocol includes an auto-compensation system for optical fluctuations, ensuring robustness over time. Additionally, the potential for multiplexing SSP and SSB to increase secure bit rates is discussed, emphasizing energy efficiency with minimal photon usage.