The present study would like to highlight in the application and utilization of the quantum cryptography for fully security to transmit the important data. In the classical cryptography system uses two key, there are public key and private key. The public key only known the receiver. But the key is shorter than the encrypted data. So it is too easy to attack. But the quantum key is with the same length as the encrypted data. So I generalized quantum cryptography system with the help of quantum key distribution , this is hypothetical approach.
.
Classical Cryptography,BB84,Quantum key.
Cryptography has many significant importance in our daily life, for example to source internet connections and bank transfers , and in various other critical…show more content… These problems in one way easy to compute but in another way to computer reverse of it is very difficult without some perfect information. Classical Cryptography has two types
1. Symmetric Cryptography –In this cryptography only one secret key [1]is used in the case of encryption and decryption.
.
2.Asymmetric Cryptography-It is public key cryptography which consists of private and public keys in the case of encryption and decryption.
Deficiencies of Classical Cryptographical problems
As the key is shorter than encrypted data so all classical[2] cryptographic system can be broken. All the existing cryptographic systems would be easy to attack when one quantum computer was developed and they are become practically worthless .
A Quantum key Distribution system encodes information in single photons. It will solve the problem of cryptography key distribution in a provable secure manner, thus allowing secure…show more content… Transmission of photon are quantum in nature and take place on a quantum channel, Such as optical fibre. The conversation between Alice and Bob about the measurement types is made on classical channel, such as telephone or email .
Eve can intercept information transmitted on the classical channel without being detected. It is not a problem in Quantum Cryptography because in this protocol the information Alice and Bob exchange is the measurement type they made not result of the measurement and therefore nothing about the key that was developed.
Suppose Eve hears on a quantum channel. She may do this by reading some photons from the burst send from Alice to Bob. Now ,Eve has photon which are same in polarization with those received by Bob, and she randomly choose her own measurement type as she does not know what measurement type Bob is going to use. Assume Alice sends circularly polarized photon , which are received by Bob and Eve. Eve and Bob decide to use rectilinear and circular basses for measurement respectively. Here Alice and Bob record the resulting data as they both use same basis but Eve does not know there result since she used the wrong basis. Now Eve decided to use the circular basis and Bob the rectilinear basis to measure it, then Eve would have the same result that Alice sent and Bob would throw the
