An Image-Encryption Algorithm Based on Stage-Merging Bit Scrambling

At present, the existing single-pixel position-scrambling technique is not sensitive to chaotic sequence used, and adjacent-pixel position scrambling has difficulty ensuring a good effect speed at same time. In this paper, stage-merging algorithm proposed, which combines two-stage process can complete dual of pixel value It only improves speed, but also greatly effects. Then, image encryption decryption scheme was designed based on bit combined with DNA coding. Security analysis shows that resist various means attack such as exhaustive differential attack. The research in paper extends bit-scrambling algorithms suitable for practical applications.