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Most cryptographic mechanisms such as symmetric and asymmetric cryptography, often involve the use of cryptographic keys. However, all cryptographic techniques will be ineffective if the key distribution mechanism is weak. Quantum Key Distribution or Quantum Cryptography is attracting much attention as a solution of the problem of Key Distribution; QKD offers unconditionally secure communication based on quantum mechanics. This paper presents Quantum Key Distribution Protocols (QKDP) to safeguard security in large networks, ushering in new directions in classical cryptography and quantum cryptography.
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