%0 Journal Article %T Development of Mechanism for Enhancing Data Security in Quantum Cryptography %A Ajit Singh %A Nidhi Sharma %J Advanced Computing : an International Journal %D 2011 %I Academy & Industry Research Collaboration Center (AIRCC) %X Nowadays security in communication is increasingly important to the network communication becausemany categories of data are required restriction on authorization of access, modify, delete and insert.Quantum cryptography is one of the solutions that use property of polarization to ensure that transmitteddata is not tampered. The research paper provides the mechanism that enhances the data security inquantum cryptography during exchange of information. In first phase detailed explanation of Quantumkey distribution¡¯s BB84 protocol is given. BB84 protocol is used as the basis for the mechanism. In nextphase the proposed mechanism is explained. The proposed mechanism combines BB84 protocol at twolevels, from sender to receiver and then from receiver to sender. Moreover, a logic circuit is used tocombine the bits hence to reduce the probability of eavesdropping. The key obtained can be used toexchange the information securely further it can help in encryption and decryption of crucial data.Double level BB84 mechanism will help in information reconciliation as well as privacy amplification. Infuture the proposed mechanism will be very beneficial where unconditional security is required duringkey and other secret information exchange %K Quantum cryptography %K Qubits %K quantum key distribution %K BB84 protocol %K uncertainty principle %U http://airccse.org/journal/acij/papers/0511acij03.pdf