ABSTRACT

Cryptography is the science of keeping private information from unauthorized access of ensuring data integrity and authentication, and it is the strongest tool for controlling against much kind of security threats. Role of cryptography appears in many secured area like government agencies, large banks, telecommunications companies and other corporations who handle sensitive or military data. Quantum cryptography is an emerging technology in which two parties may simultaneously generate shared, secret cryptographic key material using the transmission of quantum states of light. This paper consists of the main aspects of quantum cryptography and it investigates the information about where and all quantum cryptography takes place.