Design and Implementation of Color Image Encryption Based on Qubit Rotation About Axis  

作　　者：LIU Xiande XIAO Hong LI Panchi ZHAO Ya 

机构地区：[1]School of Computer and Information Technology, Northeast Petroleum University

出　　处：《Chinese Journal of Electronics》2018年第4期799-807,共9页电子学报（英文版）

基　　金：supported by the National Nature Science Foundation of China(No.61170132);the PetroChina Innovation Foundation(No.2016D-5007-0302);the Natural Science Foundation of Heilongjiang Province,China(No.F2015021)

摘　　要：Currently, almost all color image encryption/decryption algorithms are designed based on a classical computer, in which the key space is relatively small,and the huge gains from quantum parallelism are not obtained. To address this problem, we propose a novel color image encryption/decryption method based on random rotation of qubit and Quantum Fourier transform(QFT).First, the color image is represented in a quantum superposition state |Image>, in which the color information of each pixel is described by only one qubit |c>. Then, the |c> are randomly rotated on the Bloch sphere about three coordinate axis, and the QFT is performed on the |Image>.Once again, the |c> is randomly rotated on the Bloch sphere and then the inverse QFT is performed on the |Image>,which the encryption process is implemented. The keys are the rotation angles of two above-mentioned rotations.The decryption is the inverse process of the encryption.Our method may run on a quantum computer in the future. The simulation results on the classic computer show that our approaches have better security.Currently, almost all color image encryption/decryption algorithms are designed based on a classical computer, in which the key space is relatively small,and the huge gains from quantum parallelism are not obtained. To address this problem, we propose a novel color image encryption/decryption method based on random rotation of qubit and Quantum Fourier transform（QFT）.First, the color image is represented in a quantum superposition state ｜Image〉, in which the color information of each pixel is described by only one qubit ｜c〉. Then, the ｜c〉 are randomly rotated on the Bloch sphere about three coordinate axis, and the QFT is performed on the ｜Image〉.Once again, the ｜c〉 is randomly rotated on the Bloch sphere and then the inverse QFT is performed on the ｜Image〉,which the encryption process is implemented. The keys are the rotation angles of two above-mentioned rotations.The decryption is the inverse process of the encryption.Our method may run on a quantum computer in the future. The simulation results on the classic computer show that our approaches have better security.

关 键 词：Color image representing Color image encrypting Qubit rotating Quantum Fourier transform Quantum image processing 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] TP391.41[自动化与计算机技术—计算机科学与技术]