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Can Quantum Mechanics Help Keep a Secret? Abstract This review discusses the need for extra security on the internet by use of more powerful cryptosystems than those in use today. The RSA cryptosystem is discussed and it's algorithm is also shown in detail. The emergence of Quantum Computers that would be able to work through the algorithm with ease are mentioned, illustrating that the security of RSA cryptosystems is only temporary. Quantum cryptography, the new system which relies on Heisenburg's Uncertainty Princple for it's security rather than the difficulty to factorise the RSA algorithm is discussed as the replacement. How the system works is principly discussed followed by the established protocol for implementing it. However, quantum cryptography is not absolutely secure from attack. The problems arise when an attempt is made to implement all the theoretical ideas into practise. Some clever hacks, thought up by the very designers and engineers of...

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