Measurement of encryption quality of bitmap images with RC6, and two modified version block cipher

Abstract EN

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.