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Quantum Cryptography is a technology ensuring secured communication that is used as a means of data transaction among network systems. These data and informations are used in banking, secret services, military, business, scholastic instruction and research in various fields both in private as well as open systems. These days, mathematical hypothesis is applied for encoding and unscrambling on both sender and receiver in PC security and systems. Thus, to utilize security assault with superior PC (e.g. quantum PC) assailant has to locate a key and after that gets the information in feasible period. Quantum cryptography is an arrangement where the utilization of polarization guarantees that the transmitted information is not intercepted by any interfering entity. This paper deals with a new three way model where a reliable outsider is used to secure the correspondence channel using an unknown discreet key.