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Research Journal of Engineering and Technology
Year : 2017, Volume : 8, Issue : 4
First page : ( 301) Last page : ( 305)
Print ISSN : 0976-2973. Online ISSN : 2321-581X.
Article DOI : 10.5958/2321-581X.2017.00051.4

Colour Image Encryption Using Chaotic System

Sundari T. Jaspar Vinitha*, Karthika K.

Assistant Professor, Department of Electronics and Communication Engineering, Kumaraguru College of Technology, Coimbatore-641049

*Corresponding Author Email: jasparvinithasundari.t.ece@kct.ac.in

Online published on 24 May, 2018.

Abstract

In this paper, color image encryption using the chaotic algorithm for a highly secure transmission is proposed. The RGB image matrices are divided into blocks of 16 pixels such that every 16 pixels will be encrypted with different session keys using chaotic logistic map. This is done by changing the initial condition with change in key for every block of pixels. The proposed scheme utilizes two chaotic logistic maps and an external key of 80bit. To make the cipher more sheltered, the secret key is customized after encrypting a block of pixels of the image. To improve the speed and Accuracy, the number of blocks of pixels for which the key has to be changed, is increased. The results of several experimental, statistical analysis and key sensitivity tests show that the proposed image encryption scheme provides an efficient and secure way for real-time image encryption and transmission.

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Keywords

Secure image encryption, Logistic map, Pixels Block division.

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