ImageEncryptionBasedOnGyratorTransformUsingChaoticMaps

摘要：

In this paper, we propose an algorithm for image encryption using chaotic maps and gyrator transform. Chaotic Logistic and tent maps are used to generate the required random bit sequences. Pixels of the plain image are encrypted through gyrator transform, and then it is partitioned into 8 bit map planes. Later, the bits of each plane are substituted according to random bit matrix that is the products of chaotic maps. The proposed method produces encrypted image whose performance is evaluated by chi-square test, correlation coefficient, Number Pixel of Change Rate (NPCR), Unified Average Changing Intensity (UACI). Based on the fact that continuous form of gyrator transform has very high computational load, then a discrete form of gyrator transform is formulated for achieving better results that is widely used in optical systems. The computational overhead is highly reduced in this formulation by employing Fast Fourier transform.

关键词： gyrator transform chaoticmap substitution random bit sequence

作者: Himan Khanzadi Mojtaba Amini Omam Foad Lotfifar Mohammad Eshghi

作者单位: Electronic and Computer Engineering Department, Shahid Beheshti University,Tehran, Iran Electronic Research Center, Iran University of Science and Technology, Tehran, Iran

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 2608-2612

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）