不定长量子密钥的彩色图像三重加密算法

Triple Encrypting Algorithm for Color Images Based on Indefinite Length Quantum Key

为了在进一步提高算法安全性的同时兼顾加密有效性,基于量子密钥序列优越的随机性,提出一种融合了图像空间域和变换域理念的RGB彩色图像三重加密算法。算法首先在图像空间域进行量子密钥分块的循环加密,然后对图像的RGB三色通道进行量子密钥全加密,最后将图像小波变换域的低频系数与量子密钥进行异或加密。经验证,算法面对差分攻击时展现出了良好的抗性,同时由于量子密钥的融入和不定长密钥的设计理念使该算法产生的密文图像在像素值层面具有良好的随机性和安全性,为图像加密技术领域提供了一种新的思路。

In order to further improve the security of the algorithm and take into account the effectiveness of encryption,based on the superior randomness of quantum key sequence,this paper proposes a RGB color image triple encryption algorithm which combines the concept of image space domain and transform domain.Firstly,the algorithm circularly encrypts the quantum key blocks in the image space domain,then encrypts the RGB three color channel of the image with the quantum keypositioning system.Finally,the low-frequency coefficients of the image wavelet transform domain and the quantum key are XOR encrypted.The experimental results show that the algorithm shows good resistance to differential attacks.At the same time,due to the integration of quantum key and the design concept of indefinite length key,the ciphertext image generated by the algorithm has good randomness and security at the pixel value layer.Therefore,this work provides a new idea for the field of image encryption technology.