NEW IMAGE ENCRYPTION METHOD BASED ON ICA

A. Alfalou, IEEE Senior Member
Laboratoire Brest ISEN L@bISEN
29228 Brest Cedex, FRANCE
ayman.al-falou@isen.fr
www.isen.fr

A.Mansour, IEEE Senior Member
E3I2, ENSIETA
29806 Brest, FRANCE.
mansour@ieee.org.
ali.mansour.free.fr

ABSTRACT
In the last decade, Independent component analysis (ICA) becomes
one of the most important signal processing tools. Many
algorithms have been proposed to separate successfully monodimensional
signals from their observed mixed signals. Recently,
ICA has been applied to face recognition problem. In
this manuscript, a new idea for image encryption and decryption
schemes, based on ICA, is proposed. Using some mixing
procedure as an encryption method, one can hide useful information
transmitted over wireless channels. The main idea of our
approach is to secure the transmitted information at two levels:
classical level using standard keys and second level (spatial diversity)
using independent transmitters. In the second level, a
hacker should intercept not one channel but all of them in order
to retrieve the information. At designed receiver, one can easily
apply ICA algorithms to decrypt the received signals and retrieve
the information.

Keywords: Decorrelation, Second order Statistics, Whiteness,
Blind separation of sources, Image Encryption / Decryption.