Quantum cryptography uses the law of quantum physics for unconditionally secure data communications. This is a main achievement because the cryptography currently in use, known as conventional cryptography, relies completely on the hardness of a mathematical equation. The advances in quantum computing has threatened the computational security of classical cryptography, which in theory can effic...

The aim of this paper is to elucidate the implications of quantum computing in present cryptography and to introduce the reader to basic post-quantum algorithms. In particular the reader can delve into the following subjects: present cryptographic schemes (symmetric and asymmetric), differences between quantum and classical computing, challenges in quantum computing, quantum algorithms (Shor’s ...

Secure transmission of messages has been a major goal since ages, for which cryptography is used. Cryptography is a mathematical techniques used for secure communication. Classical cryptography is traditional means that comprises mathematical functions to restrict eavesdropping problem in communication. Quantum cryptography is a new approach towards secure communication which uses phenomenon of...