Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm

Rijndael, the Advanced Encryption Standard (AES) is an encryption standard uses ByteSub, Shiftrow, Mixcolumn and KeyExpansion functions which are the principle of generating a random and pseudorandom numbers. AES has larger S-boxes, but a very simple algebraic description that make it particularly v...

Full description

Saved in:

Bibliographic Details
Main Author:	Abdulbari Ali, Sherif
Format:	Thesis
Language:	English
Published:	2005
Subjects:	Data encryption (Computer science) - Malaysia
Online Access:	http://psasir.upm.edu.my/id/eprint/5845/1/FSKTM_2005_2%20IR.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-upm-ir.5845
record_format	uketd_dc
spelling	my-upm-ir.58452022-01-05T07:18:42Z Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm 2005-12 Abdulbari Ali, Sherif Rijndael, the Advanced Encryption Standard (AES) is an encryption standard uses ByteSub, Shiftrow, Mixcolumn and KeyExpansion functions which are the principle of generating a random and pseudorandom numbers. AES has larger S-boxes, but a very simple algebraic description that make it particularly vulnerable. Attacks against simplified variants of the AES algorithm have been reported for 128-bit keys, 7 rounds out of 10 have been attacked; for 192-bit keys, 7 rounds out of 12 have been attacked; for 256-bit keys, 9 rounds out of 14 have been attacked. NIST stated that AES appears to offer an adequate security margin. It is estimated that attacks in the indicated number of rounds above would result in a heavy cost to resources. Thus, it may be some time before malicious hackers have the ability to break AES in its original form. However, the rapid growth of computer technology and its resources may make this time shorter than NIST estimated time to break the algorithm. This research proposes a transformation function to be added to the AES algorithm. The new transformation function is shifting the columns of the AES state after the Mixcolumn function is applied to the state. This transformation function improves the security of the AES algorithm by increasing the randomness of the AES output sequence. The new approach has shown positive result in terms of the randomness of output sequence. The approach has increased randomness in comparison to the output sequence of the original AES algorithm. Data encryption (Computer science) - Malaysia 2005-12 Thesis http://psasir.upm.edu.my/id/eprint/5845/ http://psasir.upm.edu.my/id/eprint/5845/1/FSKTM_2005_2%20IR.pdf text en public masters Universiti Putra Malaysia Data encryption (Computer science) - Malaysia Computer Science and Information Technology Mahmod, Ramlan
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Mahmod, Ramlan
topic	Data encryption (Computer science) - Malaysia
spellingShingle	Data encryption (Computer science) - Malaysia Abdulbari Ali, Sherif Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
description	Rijndael, the Advanced Encryption Standard (AES) is an encryption standard uses ByteSub, Shiftrow, Mixcolumn and KeyExpansion functions which are the principle of generating a random and pseudorandom numbers. AES has larger S-boxes, but a very simple algebraic description that make it particularly vulnerable. Attacks against simplified variants of the AES algorithm have been reported for 128-bit keys, 7 rounds out of 10 have been attacked; for 192-bit keys, 7 rounds out of 12 have been attacked; for 256-bit keys, 9 rounds out of 14 have been attacked. NIST stated that AES appears to offer an adequate security margin. It is estimated that attacks in the indicated number of rounds above would result in a heavy cost to resources. Thus, it may be some time before malicious hackers have the ability to break AES in its original form. However, the rapid growth of computer technology and its resources may make this time shorter than NIST estimated time to break the algorithm. This research proposes a transformation function to be added to the AES algorithm. The new transformation function is shifting the columns of the AES state after the Mixcolumn function is applied to the state. This transformation function improves the security of the AES algorithm by increasing the randomness of the AES output sequence. The new approach has shown positive result in terms of the randomness of output sequence. The approach has increased randomness in comparison to the output sequence of the original AES algorithm.
format	Thesis
qualification_level	Master's degree
author	Abdulbari Ali, Sherif
author_facet	Abdulbari Ali, Sherif
author_sort	Abdulbari Ali, Sherif
title	Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
title_short	Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
title_full	Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
title_fullStr	Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
title_full_unstemmed	Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm
title_sort	improving the randomness of output sequence for the advanced encryption standard cryptographic algorithm
granting_institution	Universiti Putra Malaysia
granting_department	Computer Science and Information Technology
publishDate	2005
url	http://psasir.upm.edu.my/id/eprint/5845/1/FSKTM_2005_2%20IR.pdf
_version_	1747810493040427008

Improving The Randomness of Output Sequence for The Advanced Encryption Standard Cryptographic Algorithm

Similar Items