A new image encryption scheme is proposed with a combination of block scrambling, closed-loop diffusion, and DNA molecular mutation. The new chaotic block scrambling mechanism is put forward to replace the traditional swapping rule by combining the rectangular-ambulatory-plane cyclic shift with the bidirectional random disorganization. The closed-loop diffusion strategy is designed to form a feedback system, which improves the anti-interference capacity of the algorithm. To further destroy the blocks characteristics and eliminate the correlations among adjacent blocks, two efficient methods of DNA molecular mutation are adopted in the mutation stage. Moreover, the proposed algorithm possesses a large key space and the keys are highly related with the plaintext image. Experimental results demonstrate that the suggested image encryption strategy is practicable and has strong ability against a variety of common attacks.

中文翻译：

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基于块加扰，闭环扩散和DNA分子突变的图像加密方案

提出了结合块加扰，闭环扩散和DNA分子突变的新图像加密方案。提出了一种新的混沌块加扰机制，将矩形移动平面的循环移位与双向随机杂乱相结合，以取代传统的交换规则。设计了闭环扩散策略以形成反馈系统，从而提高了算法的抗干扰能力。为了进一步破坏区块的特性并消除相邻区块之间的相关性，在突变阶段采用了两种有效的DNA分子突变方法。此外，该算法具有较大的密钥空间，并且密钥与明文图像高度相关。