What is Information Security?

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來自 University of London 的課程

Information Security: Context and Introduction

374 個評分

University of London

Information Security: Context and Introduction

374 個評分

In this course you will explore information security through some introductory material and gain an appreciation of the scope and context around the subject. This includes a brief introduction to cryptography, security management and network and computer security that allows you to begin the journey into the study of information security and develop your appreciation of some key information security concepts. The course concludes with a discussion around a simple model of the information security industry and explores skills, knowledge and roles so that you can determine and analyse potential career opportunities in this developing profession and consider how you may need to develop personally to attain your career goals. After completing the course you will have gained an awareness of key information security principles regarding information, confidentiality, integrity and availability. You will be able to explain some of the key aspects of information risk and security management, in addition, summarise some of the key aspects in computer and network security, including some appreciation of threats, attacks, exploits and vulnerabilities. You will also gain an awareness of some of the skills, knowledge and roles/careers opportunities within the information security industry.

從本節課中

Introduction to Information Security

What is Information Security?3:32

與講師見面

Professor Peter Komisarczuk
Programme Director
Information Security Group, Royal Holloway, University of London
Professor Keith M. Martin
Professor of Information Security
Information Security Group, Royal Holloway, University of London
Dr Jorge Blasco Alis
Lecturer in Information Security
Information Security Group, Royal Holloway, University of London

[MUSIC]

Let's start this course by considering some definitions.

By the end of this unit,

you'll be able to answer the question, what is information security?

Information can be considered as some meaning conveyed by a sequence of symbols.

The symbols can be alphabetics which is characters, numbers, punctuations etc.

Or it could be, for example, a genetic sequence and can be physical or logical.

So a book or something on a computer.

Information can be measured, a discipline called Information Theory

that developed from the work of Claude Shannon in the 1940s.

Additional aspects surround the definition of information,

typically includes, accurate, timely, contextualised and

relevant, purposeful, that is specific and can be organized.

Valuable, because we can monetize it.

We can increase understanding, decrease uncertainty, and

it can affect behavior decisions and outcomes.

Security has several meanings.

The one I will use here is the state of being free from danger or threats.

It can be applied to both physical and logical scenarios.

To a vulnerable asset or a valuable asset.

The Cambridge English Dictionary says that security is the protection of a building,

a person, an organisation or a country against threats such as crime.

Security can be provided through physical artifacts such as walls and locks.

People and processes, inspections, surveillance,

authorizations such as we find in airports.

Combining information and security, we see useful definitions.

From Wikipedia, information security is defined as the practice of defending

information from unauthorised access, use, disclosure,

disruption, modification, inspection, recording or destruction.

It is a general term that can be used regardless of the form

that the data may take, whether that's physical or in a computer.

We often use information security in the context of computer systems.

In recent years, the term cyber security has been coined.

So, the association of computer machinery has

a joint task force which is defining cyber security.

They define it as a computing-based discipline involving technology, people,

information, and processes to enable assured operations of an organization.

It involves the creation, the operations, analysis and

testing of secure computer systems.

It is an interdisciplinary course of study, which includes aspects of law,

policy, human factors, ethics, and risk management in the context of adversaries.

From the definitions, we can see that information security is broader or

wider than cyber security.

Although today, much of information security is,

of course, framed within the context of cyber security.

The readings in this section allow us to explore the definition

of information security and cyber security further.

In the next section, we explore the different aspects that make up information

security to give us a breadth to our definition.

[MUSIC]

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