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has been cited by the following article:

• TITLE: A New Digital Image Encryption Algorithm Based on Improved Logistic Mapping and Josephus Circle

  AUTHORS: Zhiben Zhuang, Jing Wang, Jingyi Liu, Dingding Yang, Shiqiang Chen

  KEYWORDS: Digital Image Encryption, Image Block Scrambling, Josephus Loop, Logistic Mapping, Pixel Scrambling

  JOURNAL NAME: Journal of Computer and Communications, Vol.6 No.6, June 21, 2018

  ABSTRACT: Digital image encryption based on Joseph circle and Chaotic system has become a hot spot in the research of image encryption. An encryption algorithm based on improved Josephus loop and logistic mapping is proposed to scrambling blocks in this paper. At first, the original image is scrambled by using logistic mapping to obtain the encrypted image, and then the encrypted image is divided into many blocks. Finally, the position of the blocked image is scrambled by using the improved Josephus ring to get the encrypted image. According to the experiments, the information entropy of the encrypted image reaches 7.99 and the adjacent correlations in three directions are within ±0.1. The experimental results show that the proposed algorithm has advantages of large key space, high key sensitivity and can effectively resist the attacks of statistical analysis and gray value analysis. It has good encryption effect on digital image encryption.