Abstract: In this study a new quantum encryption algorithm based on quantum key generation will be proposed. The whole process including the Quantum Key generation, Quantum Padding bit generation and the Quantum Block encryption algorithm are based on the idea of quantum half adder with introduced bit-swapping in the encryption process, the transmission of the necessary information and the decryption that will be illustrated. The mechanism of the algorithm is explained with the aid of an example. Finally a short security analysis will be given to show the difference between it’s the classical counterpart.