Abstract:
Cyber and Information security are among the most critical challenges facing nowadays
technologies, especially with the discrepancy in devices' capabilities that have increased with the
emergence of the Internet of Things (IoT) devices. The main problem in IoT security is how to
find lightweight cryptosystems that are suitable for devices with limited capabilities. In this thesis,
a comprehensive literature survey that discusses the most prominent encryption algorithms used
in device security in general and IoT devices in specific has been conducted. Many studies related
to this field have been discussed to identify the most important requirements of lightweight
encryption systems to be compatible with variances in IoT devices. Also, we explored the results
of security and performance of the AES algorithm by changing it’s core parameters and functions
including the MixColumns and the number of rounds. In case of changing MixColumns, the results
showed the security has been adversely affected. While changing in the number of rounds provides
a promising result to improve the algorithm performance while keeping an acceptable security
level which makes it more adaptable to IoT devices. In general, the results showed that running
three rounds of standard AES maintains the same level of security practically under specific criteria
with a 386% improvement in performance indicators. Accordingly, we proposed a New
Lightweight AES (NLW-AES) which maintain the standard AES-MixColumns with three rounds
of AES. Finally, we tested both the Standard AES and the New Lightweight AES on Raspberry
Pi as an IoT model which provide compatible results with the explored scenarios.
Keywords: IoT Security, Networks, Cryptography, AES, Lightweight cryptography.
Description:
CD, no of pages 139 , 31117, informatics 1/2022
