Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Bitmap

Measurement of Encryption Quality of Bitmap Images with RC6, and two modified version Block Cipher

Baedaa H. Helal; Ashwaq T. Hashim

Engineering and Technology Journal, 2010, Volume 28, Issue 17, Pages 5603-5613

With the fast evolution of digital data exchange, security information
becomes much important in data storage and transmission. Due to the increasing
use of images in industrial process, it is essential to protect the confidential image
data from unauthorized access. In this paper, RC6 with two modified version 512
bit RC6 and 640 bit RC6-Cascade encryption algorithms will be analyzed to
investigate the encryption efficiency for them to digital images and providing a
new mathematical measure for encryption efficiency. Detailed results in terms of
security analysis and implementation are given. Comparative study with three
versions of RC6 encryption algorithms is shown the superiority of the modified
algorithms. Three measuring quality factors will be considered to evaluate and
compare between the three encryption algorithms RC6, 512 RC6, and 640 RC6-
Cascaded. These measuring factors are the maximum deviation, the correlation
coefficient and irregular deviation.