IJCSNS International Journal of Computer Science and Network Security, VOL.8 No.4, April 2008
191
An Image Encryption Approach Using a Combination of Permutation Technique Followed by Encryption
Mohammad Ali Bani Younes 1† and Aman Jantan 2††,
Universiti Sains Malaysia, Computer Science, Penang , Malaysia multimedia data. Even though Triple-DES and IDEA can achieve high security, it may not be suitable for Summary Data encryption is widely used to ensure security in open multimedia applications and therefore encryption networks such as the internet. Each type of data has its own algorithms such as DES, AES, RSA and IDEA were built features, therefore, different techniques should be used to protect for textual data. These algorithms are used perfectly to confidential image data from unauthorized access. Most of the secure textual data. However, digital images are different available encryption algorithms are used for text data, however, from texts in many aspects and thus requiring different due to large data size and real time constrains, algorithms that are encryption algorithms [5]-[10]. In most of the natural good for textual data may not be suitable for multimedia data. In images, the values of the neighboring pixels are strongly most of the natural images the values of the neighboring pixels correlated. This means that the value of any given pixel are strongly correlated. This means that the value of any given can be reasonably predicted from the values of its pixel can be reasonably predicted from the values of its neighbors. In this paper, we introduce a new permutation neighbors [11]-[13]. In order to dissipate the high technique based on the combination of image permutation and a correlation among pixels and increase the entropy value, well known encryption algorithm called RijnDael. The original we propose a permutation process based on the image was divided into 4 pixels × 4 pixels blocks, which were combination of the image permutation and a...