Open AccessModified AES for Text and Image Encryption
Author(s) -
Heidilyn V. Gamido,
Ariel M. Sison,
Ruji P. Medina
Publication year - 2018
Publication title -
indonesian journal of electrical engineering and computer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.241
H-Index - 17
eISSN - 2502-4760
pISSN - 2502-4752
DOI - 10.11591/ijeecs.v11.i3.pp942-948
Subject(s) - encryption , advanced encryption standard , aes implementations , permutation (music) , computer science , encryption software , transformation (genetics) , computation , multiple encryption , 40 bit encryption , cryptography , algorithm , probabilistic encryption , s box , 56 bit encryption , theoretical computer science , parallel computing , block cipher , computer network , biochemistry , physics , chemistry , acoustics , gene
Advanced Encryption Standard (AES) is one of the most frequently used encryption algorithms. In the study, the Advanced Encryption Standard is modified to address its high computational requirement due to the complex mathematical operations in MixColumns Transformation making the encryption process slow. The modified AES used Bit Permutation to replace the MixColumns Transformation in AES since bit permutation is easy to implement and it does not have any complex mathematical computation. Results of the study show that the modified AES algorithm exhibited increased efficiency due to the faster encryption time and reduced CPU usage. The modified AES algorithm also yielded higher avalanche effect which improved the performance of the algorithm.