Quantum Cryptography: from Theory to Practice

TL;DR

This paper reviews the theoretical foundations and practical implementations of quantum cryptography, emphasizing recent advancements and its potential for unconditional security based on physical laws.

Contribution

It provides a comprehensive survey of quantum cryptography, bridging theoretical concepts with practical developments and highlighting recent progress in the field.

Findings

Quantum cryptography offers unconditional security based on physical laws.

Recent developments have advanced practical implementations.

The survey connects theory with real-world applications.

Abstract

Quantum cryptography can, in principle, provide unconditional security guaranteed by the law of physics only. Here, we survey the theory and practice of the subject and highlight some recent developments.