Authors : Alharith A. Abdullah, Rifaat Z. Khalaf and Mustafa Riza
Abstract: In this study, a modifiable 2-qubit quantum block encryption algorithm employing the idea of superdense coding will be proposed. One of the most fascinating properties of this algorithm is that after a step of analysis we can decide when to change the operations of the algorithm whenever it is statistically necessary. The underlying operations in this algorithm are unitary operators which can be represented using rotation matrices. The parameters for the combination of the rotation matrices can be generated using a quantum random number generator and transmitted safely taking advantage of the BB84 protocol, to generate the needed unitary operators for decryption. The message, being transmitted over an insecure channel, will be encrypted using the modifiable 2-qubit block encryption algorithm developed in this study. The keys are created using a quantum random number generator are also transmitted securely applying the BB84 algorithm. The security analysis and an example illustrating how the algorithm works rounds off this study. An overview of the complete process from the generation of the algorithm to the decryption of the message is illustrated explicitly.
Alharith A. Abdullah, Rifaat Z. Khalaf and Mustafa Riza, 2016. A Modifiable 2-Qubit Quantum Block Encryption Algorithm. International Journal of Soft Computing, 11: 465-472.