Enhancing the substitution box’s functionality in a symmetric cryptography using dynamic technique

Other Title(s)

تحسين أداء مربع الاستبدال في التشفير المتناظر باستخدام تقنية ديناميكية

Dissertant

al-Saqqa, Zaynah Samir

Thesis advisor

al-Sarayirah, Jafar Muhammad
al-Fayyumi, Mustafa

University

Princess Sumaya University for Technology

Faculty

King Hussein Faculty for Computing Sciences

Department

Information Systems Security and Digital Criminology

University Country

Jordan

Degree

Master

Degree Date

2018

English Abstract

Encryption is essential in cryptography to restrict data to authorized readership.

Advanced Encryption Standard (AES) cryptography algorithm is widely used to protect information privacy and ensure user authentications, and it has not been hacked despite several cryptanalysis attempts.

AES achieves the confusion property using the substitution box (S-box) many times, having a non-linear relationship between the input and output, and achieves the diffusion property when changing only one bit of the input then changing half of the output bits.

This thesis highlights the S-box static attribute issue (which returns the same output each time the S-box gets the same input) by converting the S-box from static to dynamic with a new dynamic S-box design, depending on a random generator number with a new S-box generator.

It uses three suggested algorithms (Stash, Zigzag and Hybrid) to increase the AES security level and engage it with more difficult analyses, with increasing number of expected probabilities.

The implemented S-box generator and algorithms was merged with another ready-made AES program for accuracy and comparison with Standard AES according to the S-box properties of Avalanche Effect, Hamming Distance, Balancing Output, Correlation Factor, and Randomness using Image Histogram.

The suggested models outperform or are similar to the original Standard AES regarding S-box properties, while the Zigzag Algorithm achieves the optimum performance closest to the Standard AES execution time

Main Subjects

Information Technology and Computer Science

Topics

No. of Pages

162

Table of Contents

Table of contents.

Abstract.

Abstract in Arabic.

Chapter One : Introduction.

Chapter Two : Advanced encryption standard.

Chapter Three : Literature review and related works.

Chapter Four : Proposed work.

Chapter Five : Implementation and evaluation.

Chapter Six : Discussion of results.

Conclusion and future work.

References.

American Psychological Association (APA)

al-Saqqa, Zaynah Samir. (2018). Enhancing the substitution box’s functionality in a symmetric cryptography using dynamic technique. (Master's theses Theses and Dissertations Master). Jordan
https://search.emarefa.net/detail/BIM-833381

Modern Language Association (MLA)

al-Saqqa, Zaynah Samir. Enhancing the substitution box’s functionality in a symmetric cryptography using dynamic technique. (Master's theses Theses and Dissertations Master). (2018).
https://search.emarefa.net/detail/BIM-833381

American Medical Association (AMA)

al-Saqqa, Zaynah Samir. (2018). Enhancing the substitution box’s functionality in a symmetric cryptography using dynamic technique. (Master's theses Theses and Dissertations Master). Jordan
https://search.emarefa.net/detail/BIM-833381

Language

English

Data Type

Arab Theses

Record ID

BIM-833381