Security of entanglement based version of BB84 protocol for Quantum Cryptography

As the quantum cryptography is the ultimate solution for information security. Quantum cryptography describes the ultimate way for key distribution. Unlike many of the classical cryptosystems in use today, whose security often draws on unproven assumptions about the computational complexity of mathematical problems, the security of quantum cryptography is based on the laws of physics. The Quantum Key Distribution follows some protocols for key distribution. In this paper we describe the BB84 protocol which is used in Quantum Cryptography and the security aspect of entanglement based version of BB84.