Abstract: In today’s scenario, people share information to another people frequently using network. Due to this, more amount of information are so much private but some are less private. Therefore, the attackers or the hackers take the advantage and start attempting to steal the information since 2001. the symmetric encryption algorithm called 512-bit AES provides high level of security, but it's almost be impossible to be used in multimedia transmissions and mobile systems because of the need for more design area that effect in the use of large memory space in each round and the big encryption time that it takes. This paper presents an improvement of 512-bit AES algorithm with efficient utilization of resources such as processor and memory space. The proposed approach resists the linear and differential encrypt analysis and provides high security level using a 512-bit size of key block and data block and ameliorates the performance by minimizing the use of memory space and time encryption to be able to work in specific characteristics of resource-limited systems. The experimental results on several data (text, image, sound, video) show that the used memory space is reduced to quarter, and the encryption time is reduced almost to the half. Therefore, the adopted method is very effective for encryption of multimedia data.

GUESMIA Seyf Eddine, ASSAS Ouarda and BOUDERAH Brahim, “High Lightweight Encryption Standard (HLES) as an Improvement of 512-Bit AES for Secure Multimedia” International Journal of Advanced Computer Science and Applications(IJACSA), 7(1), 2016. http://dx.doi.org/10.14569/IJACSA.2016.070170

@article{Eddine2016,
title = {High Lightweight Encryption Standard (HLES) as an Improvement of 512-Bit AES for Secure Multimedia},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2016.070170},
url = {http://dx.doi.org/10.14569/IJACSA.2016.070170},
year = {2016},
publisher = {The Science and Information Organization},
volume = {7},
number = {1},
author = {GUESMIA Seyf Eddine and ASSAS Ouarda and BOUDERAH Brahim}
}