Abstract

In the present modern technology era, there is advancement in technology everywhere but security takes a back step. Since from ancient times various cryptographic techniques were used for the purpose of Military. Network wherever, whatever, private or public needs to be secured. Network security consists of services, facilities to prevent and monitor unofficial access, wrong usage, alterations, denial of computer network. The word cryptography comes from two Greek words ‘Kryptos’ mean hidden secrets and ‘Graphein’ means writing. Cryptography is step towards protection of network and data transmission.  It uses coded language that appears as garbage to third party. This garbage actually is encrypted data via cryptography known as Cipher text. Cryptography includes basically encryption and decryption of data to store information securely. It is a crucial issue on World Wide Web but it is to be used correctly. It provides Confidentiality, Integrity, Accuracy. Quantum cryptography is a far more powerful and impenetrable encryption method. Quantum has the potential to affect the relation of codebreakers and code makers. Using Quantum Mechanical principles and methods for encoding and decoding of information could alter the way cybercrimes are committed. Quantum cryptography has become increasingly complex but applicable to many modern products. The use of this cryptography can be found in a wider use of products including bank cards, digital passwords and ultra-secure voting.