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Quantum Key Distribution was named as one of the top §ten emerging technologies by Technology Review §Journal in 2003. The growth in quantum cryptography §since the beginning of the millennium has been §expedited by new theories and ideas. §When Bennett and Brassard proposed their BB84 §protocol in 1984, no one would have guessed the §quantum revolution they had launched. Since then, §new protocols have been proposed and new theories §developed, but BB84 remains the simplest and §probably the easiest to implement. Now that the §practical implementation of basic quantum §cryptography has been achieved, one can be almost §certain that new protocols will sooner or later be §tested for the efficiency they could provide. We §have developed a Classical Authentication Aided §(CAA) protocol, which merges the classical §authentication policies with quantum transmission to §make it even more secure. With the complexities of §the authentication policies and the bit to qubit §conversion, our system becomes a complex one. We §also discuss the possibilities of free space quantum §transmission of the protocol instead of only through §optical fiber.