一种彩色量子图像加密方案

摘要

论文提出了一种量子彩色图像加密方案.首先,采用NEQR模型将经典彩色图像转换为量子图像,其中每个像素的R,G,B颜色值采用24个量子比特描述,每种基色采用8个量子比特.然后,采用量子受控旋转门将这些描述颜色的量子比特分别随机旋转π2或π弧度.此时量子图像还原为经典图像之后不再含有任何信息.解密过程是加密的逆过程,经典计算机上的仿真结果表明该方法有较好的安全性.%In this paper,a simple encryption scheme for quantum color image is proposed. Firstly,a color image is trans?formed into a quantum superposition state by employing NEQR(novel enhanced quantum representation),where the R,G,B values of every pixel in a 24-bit RGB true color image are represented by 24 single-qubit basic states,and each value has 8 qubits. Then, each of these 24 qubits is randomly rotated π 2 or π radian by employed the controlled rotation gates. After measuring,the whole image does not provide any information. Decryption is the reverse process of encryption. The experimental results on the classical computer show that the proposed encryption scheme has better security.