基于混沌序列的量子图像加密方案

Quantum Image Encryption Scheme Based on Chaotic Sequence

针对量子图像加密问题,设计一种基于混沌序列的加密方案。首先,采用NEQR模型描述量子图像,然后,采用3种混沌序列和受控旋转门使每个颜色比特随机旋转±π/4弧度,完成加密过程。解密时,首先根据密钥生成混沌序列,然后使每个颜色比特随机旋转π/4弧度即可。该方法加密后的直方图呈均匀分布,且密钥空间大,抗攻击能力强。经典计算机上的仿真结果表明该方法有较好的安全性。

Aiming at the problem of quantum image encryption,this paper designs an encryption scheme based on chaotic sequence.Firstly,the NEQR(Novel Enhanced Quantum Representation)model is used to represent quantum images.Then,three chaotic sequences and controlled rotation gates are used to make each color qubit rotate randomly by±π/4 radians to complete the encryption process.When decrypting,the chaotic sequence is first generated according to the secret key,and then each color qubit is rotated randomly byπ/4 radians.The encrypted histogram is uniformly distributed,and the secret key space is large,the anti-attack ability is strong.The simulation results on the classical computer show that the method has better security.