BSc IT Internet Security Notes Mumbai

Below are the list of topics included in the notes:

Sec tion Topic Page No. Revision of a part of “Data Communication and Networking” syllabus prerequisite for “Internet Security.” 0.1 Three way handshake 2 0.2 Understanding O.S.I. Model at a glance 5 0.3 Differentiate between O.S.I. Protocol suite & T.C.P./I.P. Protocol suite. 6 0.4 Attacks with reference to the OSI model 7 0.5 Node-to-Node, Host-to-Host and Process-to-Process deliveries? 9 0.6 Understanding SSL Layer 10 Position of SSL layer in TCP/IP suit 0.7 TCP Header 11 0.8 What is connection oriented and what is connectionless? 13 0.9 TCP v/s UTP 15 0.1 16 0.11 17 Introduction: 20 1 What are Security Truisms? 21 1.1 Why require a security? 22 1.2 What is a Security Policy 24 1.3 What is a Security Policy - Definition 25 1.4 Picking a Security Policy, 27

1.5 What kind of Security 28 1.6 Distinguish between a Hacker and a cracker 29 1.7 Strategies for a Secure Network, 30 1.8 The Ethics of Computer Security 32 1.9 Security threats and levels 33 1.1 Security Plan (RFC 2196) 34 1.11 What Makes a Good Security Policy? 36 1.12 The components of a good security policy 36 1.13 Deny all/ Allow all 39 1.14 Who Should be Involved When Forming Policy? 40 1.15 Security Incident Handling 41 1.16 Security breach incident: - Containment 45 1.17 Security breach incident: - Eradication 46 1.18 Security Approaches 47 1.19 Principles of Security 48 1.2 Types of attack - Active and passive 49 1.21 The Practical Side of Attacks 51 1.22 Cookies 52 1.23 Specific Attacks: - Sniffing (snooping) Spoofing 53 1.24 Chapter Summery: 55

2 Classes of Attack 60 2.1 Stealing Passwords 61 2.2 Social Engineering. 63 2.3 Bugs and Backdoors 65 2.4 Authentication Failures 67 2.5 Protocol Failures 69 2.6 Information Leakages 70 2.7 Exponential Attacks - Viruses and Worms 71 2.8 Denial-of-Service Attacks 72 2.9 Botnets. 74 2.1 Active Attacks 77 3 Computer Security 85 3.1 What are viruses, Trojan Horse, Worms 86 3.2 Types of Virus 88 3.3 How to protect the computer against virus? 91 3.4 Life stages of Virus 95 3.5 What is the Structure of Viruses? 97 3.6 Components of virus 100 4 Firewalls and Proxy Servers 106

4.1 Kinds of Firewalls 108 4.2 Packet filters 109 4.3 Application-Level Filtering 110 4.4 Circuit-Level Gateways 112 4.5 Dynamic Packet Filters 113 4.6 Distributed Firewalls. 114 4.7 What firewalls cannot Do & Filtering Services 116 4.8 Reasonable Services to Filter 117 4.9 Digging for Worms. 119 4.1 Packet Filtering. 121 4.11 Implementing policies: (Default allow, Default Deny) on proxy 123 5 Cryptography 130 5.1 Introduction to Basic encryption and Decryption, 131 5.2 Diffie – Hellman Key Exchange 138 5.3 Concept of Public key and Private key 140 5.4 The concept of Hash (Message Digest) 143 5.4 Digital Signatures 146 5.5 Symmetric Key Cryptography 150 5.6 Asymmetric Key cryptography 152 5.7 Compare & contrast Symmetric Key Cryptography with Asymmetric key cryptography 154

5.8 Pretty Good Privacy (PGP) 156 6 University Exam Paper for previous 5 years 7 Question Bank 8 Model Answers of selected and grouped questions 9 A set of 3 question papers for your Mock test and own assessment

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TYBSC IT Sem 5 Question Papers - Mumbai University