New Image Encryption and Compression Method
Based on Independent Component Analysis

Masanori Ito
and Noboru Ohnishi

Graduate School of Information Science
Nagoya University
Furo-cho, Chikusa-ku, Nagoya, 464–8603 Japan
Email: ito-m@nagoya-u.jp

Ayman Alfalou
ISEN-Brest
20 rue de cuirass´e Bretagne
29228 Brest Cedex 2, France

Ali Mansour
ENSIETA
2 Rue Franc¸ois Verny
29806 Brest, France

Abstract—For telecommunication systems, various compression
and encryption techniques are proposed to satisfy a fast
and secure transmission. However these two techniques have been
studied separately. In this paper we propose a method combining
encryption and compression based on Independent Component
Analysis (ICA) and Discrete Cosine Transform (DCT).
For encryption, target images are covered with an insignificant
image to hide them and their mixtures to be transmitted are
obtained. The receiver reconstructs the original images applying
some ICA algorithm to the mixed images. In compression process,
using DCT and simple low pass filter, the size of transmission
can be reduced.
Throughout several computer simulations, the performance of
the proposed method is confirmed.