National Program of Depth

Cyber Attacks
Protecting National Infrastructure, 1st ed.

Chapter 6
Depth

Don't use plagiarized sources. Get Your Custom Essay on
National Program of Depth
Just from $13/Page
Order Essay

Copyright © 2012, Elsevier Inc.

All Rights Reserved 1

Introduction

Anylayerofdefensecanfailatanytime,thusthe

introduction of defense in depth
Aseriesofprotectiveelementsisplacedbetweenan

asset and the adversary
Theintentistoenforcepolicyacrossallaccesspoints

Copyright © 2012, Elsevier Inc.

All rights Reserved 2

Chapter 6 – Depth

Fig. 6.1 – General defense in depth schema

Copyright © 2012, Elsevier Inc.

All rights Reserved 3

Chapter 6 – Depth

Effectiveness of Depth

Quantifyingtheeffectivenessofalayereddefenseis often difficult
Effectivenessisbestdeterminedbyeducatedguesses
Thefollowingarerelevantforestimating

effectiveness

– Practical experience

– Engineering analysis

– Use-case studies

– Testing and simulation

Copyright © 2012, Elsevier Inc.

All rights Reserved 4

Chapter 6 – Depth

Fig. 6.2 – Moderately effective single layer of protection

Copyright © 2012, Elsevier Inc.

All rights Reserved 5

Chapter 6 – Depth

Effectiveness of Depth

• Whenalayerfails,wecanconcludeitwaseither
flawed or unsuited to the target environment
• Nolayeris100%effective—thegoalofmakinglayers “highly” effective is more realistic

Copyright © 2012, Elsevier Inc.

All rights Reserved 6

Chapter 6 – Depth

Fig. 6.3 – Highly effective single layer of protection

Copyright © 2012, Elsevier Inc.

All rights Reserved 7

Chapter 6 – Depth

Fig. 6.4 – Multiple moderately effective layers of protection

Copyright © 2012, Elsevier Inc.

All rights Reserved 8

Chapter 6 – Depth

Layered Authentication

Anationalauthenticationsystemforeverycitizen would remove the need for multiple passwords, passphrases, tokens, certificates, and biometrics that weaken security
Singlesign-on(SSO)wouldaccomplishthis authentication simplification objective
However,SSOaccessneedstobepartofa multilayered defense

Copyright © 2012, Elsevier Inc.

All rights Reserved 9

Chapter 6 – Depth

Fig. 6.5 – Schema showing two layers of end-user authentication

Copyright © 2012, Elsevier Inc.

All rights Reserved 10

Chapter 6 – Depth

Fig. 6.6 – Authentication options including direct mobile access

Copyright © 2012, Elsevier Inc.

All rights Reserved 11

Chapter 6 – Depth

Layered E-Mail Virus and Spam Protection

Commercialenvironmentsareturningtovirtual,in- the-cloud solutions to filter e-mail viruses and spam
Tothatsecuritylayerisaddedfilteringsoftwareon individual computers
Antivirussoftwarehelpful,butuselessagainstcertain attacks (like botnet)

Copyright © 2012, Elsevier Inc.

All rights Reserved 12

Chapter 6 – Depth

Fig. 6.7 – Typical architecture with layered e-mail filtering

Copyright © 2012, Elsevier Inc.

All rights Reserved 13

Chapter 6 – Depth

Layered Access Controls
• Layeringaccesscontrolsincreasessecurity
• Addtothisthelimitingofphysicalaccesstoassets
• Fornationalinfrastructure,assetsshouldbecovered by as many layers possible
– Network-based firewalls – Internal firewalls

– Physical security

Copyright © 2012, Elsevier Inc.

All rights Reserved 14

Chapter 6 – Depth

Fig. 6.8 – Three layers of protection using firewall and access controls

Copyright © 2012, Elsevier Inc.

All rights Reserved 15

Chapter 6 – Depth

Layered Encryption
• Fiveencryptionmethodsfornationalinfrastructure protection
– Mobile device storage – Network transmission
– Secure commerce

– Application strengthening

– Server and mainframe data storage

Copyright © 2012, Elsevier Inc.

All rights Reserved 16

Chapter 6 – Depth

Fig. 6.9 – Multple layers of encryption

Copyright © 2012, Elsevier Inc.

All rights Reserved 17

Chapter 6 – Depth

Layered Intrusion Detection

Thepromiseoflayeredintrusiondetectionhasnot been fully realized, though it is useful
Theinclusionofintrusionresponsemakesthe layered approach more complex
Therearethreeopportunitiesfordifferentintrusion detection systems to provide layered protection

– In-band detection

– Out-of-band correlation – Signature sharing

Copyright © 2012, Elsevier Inc.

All rights Reserved 18

Chapter 6 – Depth

Fig. 6.10 – Sharing intrusion detection information between systems

Copyright © 2012, Elsevier Inc.

All rights Reserved 19

Chapter 6 – Depth

National Program of Depth
• Developingamultilayereddefensefornational infrastructure would require a careful architectural analysis of all assets and protection systems
– Identifying assets

– Subjective estimations

– Obtaining proprietary information – Identifying all possible access paths

Copyright © 2012, Elsevier Inc.

All rights Reserved 20

Chapter 6 – Depth

GradeAcers
Calculate your paper price
Pages (550 words)
Approximate price: -

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

Calculate the price of your order

Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

Essay Writing Service

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.

Order your essay today and save 15% with the discount code DISCOUNT15