• Amujo Oluyemi
• M.B Hammawa
• A.Y. Atumoshi
• A. Abdulrahman

The strength of modern cryptography algorithms are based on the factors such as keys-space, transmission techniques and fundamental process of executing one-way/trapdoor functions which are said to be intractable. But modern cryptography is vulnerable to advancement in technology and computing power that can make possible billions guesses of keys within a short period of time. In other words, by the evolvement of high-speed computers such as quantum computers, the popular schemes used in modern cryptography are becoming insignificant. As a way-forward, the quantum mechanics and computer engineering together offer a new way for securing data known as quantum cryptography with major primitive such as quantum key distribution (QKD). QKD provides secure key distribution over a network by the laws of quantum physics and ensures that encryption keys are transmitted securely even in the presence of eavesdropper. This paper focuses on quantum cryptography and how it contributes value to a long-time strategy pertaining to completely secure key distribution. The scope of this paper covers the weaknesses of modern/classical cryptosystems, the fundamental concepts of quantum cryptography that contributes to its strength such as entanglement, superposition and quantum uncertainty. Finally, the paper demonstrates, through evaluation method, that all the family of one-way/trapdoor functions is tractable on quantum system.

Quantum, cryptography, entanglement, superposition, encryption, performance, protocols, algorithms, simulator, one-way function, intractable algorithm, polynomial algorithm

"Quantum Cryptography for Secured Key Distribution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.616-624, June 2019, Available :http://www.jetir.org/papers/JETIR1906L90.pdf

"Quantum Cryptography for Secured Key Distribution", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp616-624, June 2019, Available at : http://www.jetir.org/papers/JETIR1906L90.pdf