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Explore the evolution of quantum key distribution (QKD) methodology through three decades of theoretical developments in this comprehensive seminar. Begin with the foundational BB84 and E91 protocols that established the birth of QKD, gaining essential intuition to understand general QKD protocols, their objectives, and crucial security guarantees. Progress through various proof techniques for both device-dependent and device-independent protocols, examining the Devetak-Winter asymptotic rate, finite key-rates using randomness extraction, uncertainty relations, and diverse bounds to min-entropies. Conclude by discovering a novel quantum key distribution protocol based on the Magic Square Game, providing insight into the latest advancements in the field and understanding how QKD has evolved from its early theoretical foundations to contemporary cutting-edge approaches.
