Cyber Security Essentials

V

Contents

A No t e f r o m t h e ex e c u t i v e ed i t o r s xi

A

b o u t t h e Au t h o r s xiii

c

o N t r i b u t o r s xv

1c

h A p t e r cy b e r se c u r i t y fu N d A m e N t A l s 1

1.1 Network and Security Concepts 1

1.1.1 Information Assurance Fundamentals 1

1.1.1.1 Authentication 1

1.1.1.2 Authorization 2

1.1.1.3 Nonrepudiation 3

1.1.1.4 Confidentiality 3

1.1.1.5 Integrity 4

1.1.1.6 Availability 5

1.1.2 Basic Cryptography 6

1.1.3 Symmetric Encryption 11

1.1.3.1 Example of Simple Symmetric

Encryption with Exclusive OR

(XOR)

12

1.1.3.2 Improving upon Stream Ciphers

with Block Ciphers

14

1.1.4 Public Key Encryption 16

1.1.5 e Domain Name System (DNS) 20

1.1.5.1 Security and the DNS 24

1.1.6 Firewalls 25

1.1.6.1 ...