A highly efficient and secure shared key for direct communications based on quantum channel

The reported research in literature for message transformation by a third party does not provide the necessary efficiency and security against different attacks. The data transmitted through the computer network must be confidential and authenticated in advance. In this paper, we develop and improve security of the braided single stage quantum cryptography. This improvement is based on a novel authentication algorithm by using signature verification without using the three stages protocol to share the secret key between the sender and receiver. This approach will work against attacks such as replay and man-in-the-middle by increasing the security as well as the over efficiency, reducing the overhead through using three stages and increasing the speed of the communication between two parties.