Cryptography from Quantum Mechanical Viewpoint

Abstract

Cryptography is an art and science of secure communication. Here the sender and receiver are guaranteed the security through encryption of their data, with the help of a common key. Both the parties should agree on this key prior to communication. The cryptographic systems which perform these tasks are designed to keep the key secret while assuming that the algorithm used for encryption and decryption is public. Thus key exchange is a very sensitive issue. In modern cryptographic algorithms this security is based on the mathematical complexity of the algorithm. But quantum computation is expected to revolutionize computing paradigm in near future. This presents a challenge amongst the researchers to develop new cryptographic techniques that can survive the quantum computing era. This paper reviews the radical use of quantum mechanics for cryptography.

Secure data access control for multi-authority Quantum based cloud storage

“…Fabio Pierazzi et al developed a model in which data confidentiality is increased adaptively at runtime without intermediate proxy server. However high computational cost with respect to non adaptive environment becomes drawback [6].Minal Lopes et al discussed about modernized cryptographic techniques that involves mathematical computation with high complexity thereby increasing the security with high data confidentiality. QKDP have been used for secure key sharing and distribution in quantum channel with improved confidentiality services, however it suffers from complex mathematical calculation involved in computation process [7].…”