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Quantum cryptography as a part of quantum information technology promises many technological advancements that seem complex and fictitious as much of this field is still under research and development. It functions on the principles of quantum mechanics and provides information-theoretic security, unlike the traditional cryptosystem that is based on complex math problems and is vulnerable to quantum threats.
Quantum cryptography is a matured technology that is in rivalry with blockchain tech, but studies show that the ultimate amalgamation of quantum cryptography with blockchain is inevitable