Ahmed F. Sheikh - CompTIA Security+ Certification Study Guide: Network Security Essentials
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- Book:CompTIA Security+ Certification Study Guide: Network Security Essentials
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Any source code or other supplementary material referenced by the author in this book is available to readers on GitHub via the books product page, located at www.apress.com/9781484262337 . For more detailed information, please visit http://www.apress.com/source-code .
This book is affectionately dedicated to all IT experts, professionals, and students.
is a Fulbright alumnus and has earned a masters degree in electrical engineering from Kansas State University, USA. He is a seasoned IT expert with a specialty in network security planning and skills in cloud computing. Currently, he is working as IT Expert Engineer at a leading IT electrical company.
is associated with High Speed Networks Lab, National Chiao Tung University, Taiwan, since March 2018, where he is working on a research project funded by the Ministry of Science and Technology, Taiwan. In this project, he is designing a secure and federated authentication mechanism for multiple computing paradigms in collaboration with multiple partners in Bangladesh, Turkey, and the United States. He is also working on the cost minimization of bidirectional off-loading in federated computing paradigms. In the past, he has worked with the Network Benchmarking Lab (NBL), Taiwan, where he designed various security tests for IP cameras. He has various publications in the domains of Computer Networks, Cognitive Radio Networks, PCB Routing, Optimization, Internet of Things, and Network Security.
In this chapter, we will review the goals of an information security program, and you will be introduced to the information security model, a three-dimensional model, which will be the foundation for learning the concepts of confidentiality, integrity, and availability.
Identify the concepts of confidentiality, integrity and availability.
Perform packet-level analysis.
In 1991, John McCumber created a model framework for establishing and evaluating information security (information assurance) programs, in what is now known as The McCumber Cube . This security model is depicted as a three-dimensional cube-like grid composed of information security properties or desired goals, information states, and safeguards.
- Desired Goals : The first dimension of the information security model is made up of the three information security properties. The three desired goals include confidentiality, integrity, and availability. Use the acronym CIA to help remember these three principles.
Confidentiality prevents the disclosure of information for unauthorized people, resources, and processes.
Integrity ensures that system information or processes have not been modified.
Availability ensures that information is accessible by authorized users when it is needed.
Information States : Data can be stored on a hard drive and can also be transmitted across a network or the Internet. Data can also be processed through manipulation by software. The second dimension of the information security model consists of processing, storage, and transmission.
Safeguards : Technology is usually what most information technology (IT) professionals think of when contemplating solutions to the information security puzzle. Policies and procedures provide the foundation for an organization. How would you know how to configure your firewall, a technology-based solution, without the proper policies and procedures to guide you? Educating employees through security awareness training program is an absolute must so that the security measures implemented within an organization are effective.
Everything that you learn about information security can be related back to one of the cells of this three-dimensional model.
The operational model of computer security is composed of different technologies. Protection is the sum of prevention (like firewalls or encryption) plus measures that are used for detection (like an intrusion detection system, audit logs, or honeypot) and response (backup incident response or computer forensics).
Prevention: Access controls, firewalls, and encryption
Detection:
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