Securing communication networks is a big problem in the modern world because information needs to be sent from one place to another without being hacked. The system's secrecy relies on the shared key algorithm and public key. Quantum cryptography is a technique that provides a more secure communication network based on photon polarisation and the principle of uncertainty. In order to guarantee secure communication, diverse encryption techniques are employed to withstand different forms of attack. An effective method has been proposed to enhance message authentication by combining the Blowfish algorithm (used for encryption)