Computer and Modernization

Previous Articles     Next Articles

 Self-adaptive Image Encryption Algorithm Based on Improved Logistic Chaotic Map

  

  1. College of Electronic Engineering, Xi’an University of Posts & Telecommunications, Xi’an 710121, China
  • Received:2016-03-16 Online:2016-07-21 Published:2016-07-22

Abstract:

 In order to solve the problem that the iterative sequences produced by the one-dimension(1D) Logistic chaotic map are uneven distribution and the parameter
space of chaos is smaller, an improved Logistic map was constructed by increasing the control parameter and nonlinear adjustment in the Logistic chaotic map, which has a wider
chaotic range and more uniform distribution than its prototype by analyzing bifurcation diagram and Lyapunov exponent. A self-adaptive image encryption scheme based on improved
Logistic chaotic map was introduced, and the initial value of improved Logistic chaotic map is adaptive change with the plain image, and the scheme is sensitive to all sorts of
subtle change of the plain image. Experiments and security analysis indicate that the algorithm has high security, and can resist statistical analysis and attack operation.

Key words:  Logistic map, image encryption, self-adaptive, Lyapunov exponent, bit decomposition