"We are extremely happy to come out with this book entitled “Computer System
Security – Basic Concept and Applications”. This book is for B.Tech (CSE/IT)
and MCA students of Dr. A.P. J. Abdul Kalam Technical University, Uttar Pradesh,
Lucknow. This book can also be followed by Engineering and MCA students of
other Universities. Postgraduates and Researchers will be the equal beneficiaries.
This book will help them to comprehend the basic concepts of Cyber Security.
Technology is a set of tools to improve the productivity, quality, and joy that they
get from their work. Security is an essential part of today’s cyber world. Everything,
from chat to shopping is on the internet today and thus, whatever we do online
needs to be protected and made secure. In this book, we have tried to emphasise on
the importance of security, various types of attacks, threats, vulnerabilities and
security at different levels. The topics have been presented in a form that is easy to
read and understand.
This book addresses the answer to the following questions related to computer
security:
• What are the different security architectures?
• What are the marketplaces for vulnerabilities?
• How can we defend against Control Hijacking?
• What is the Confinement principle?
• What are the various Access Control mechanisms?
• How can we have a secure web environment?
• What is Cryptography?
• How do we provide security at various levels of networking?"