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    Cryptography and Network Security

    Students studying Information Technology will find this subject very useful. Hundreds of important topics on Cryptography and Network Security are organized neatly into lessons below.

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    Overview

    Topics Covered

    Module 1: Introduction and Number Theory

    1.1 Introduction to Cryptography

    • Security Mechanisms
    • Security Services
    • Security Attacks
    • Security Goals

    1.2 Symmetric Cipher Model

    1.3 Various Encryption Techniques

    • Substitution: (i) Monoalphabetic - Caeser Cipher   (ii) Polyalphabetic - Playfair Cipher, Vignere ...

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    Module 1: Introduction and Number Theory

    1.1 Introduction to Cryptography

    • Security Mechanisms
    • Security Services
    • Security Attacks
    • Security Goals

    1.2 Symmetric Cipher Model

    1.3 Various Encryption Techniques

    • Substitution: (i) Monoalphabetic - Caeser Cipher   (ii) Polyalphabetic - Playfair Cipher, Vignere Cipher, Hill Cipher

    • Transposition: (i) Keyless   (ii) Keyed

    1.4 Stegnography

    Module 2: Block Cipher and Public Key Cryptography

    PART A:

    2.1 Data Encryption Standard

    2.2 Block Cipher Modes of Operation

    • Electronics Code Book (ECB)
    • Cipher block-chaining mode (CBC)
    • Cipher Feedback Mode (CFB)
    • Output Feedback Mode (OFB)

    2.3 Advanced Encryption Standard

    2.4 Blowfish Algorithm

    2.5 RC-5 Algorithm

    PART B:

    2.6 Public Key Cryptography (Asymmetric Key Cryptography)

    2.7 RSA Algorithm

    2.8 Knapsack Algorithm

    2.9 El-Gamal Algorithm

    PART C:

    2.10 Key Management - Diffie Hellman Key

    Module 3: Cryptographic Hashes, Message Digests and Digital Certificate

    3.1 Authentication Requirement

    3.2 Authentication Functions

    3.3 Types of Authentication

    3.4 Message Authentication Code (MAC)

    • MD5 Algorithm

    • SHA Algorithm

    • HMAC Algorithm

    3.5 Digital Certificate: X509, PKI

    Module 4: Digital Signature Scheme and Authentication Protocols

    4.1 Digital Signature Process

    4.2 Digital Signature Scheme

    • RSA
    • El Gamal
    • Schnorr
    • DSS

    4.3 Needham Schroedoer Authentication Protocol

    Module 5: Network Security

    5.1 Network Security Basics

    5.2 TCP/IP Vulnerabilities (Layer-wise)

    • Application layer: HTTP, Session Hijacking, Replay attack, Cookie poisoning, Cross-site scripting, DHCP

    • Transport layer: TCP syn flood, Port Scanning

    • Network layer: IP Spoofing, Packet sniffing

    • Data link layer: ARP Spoofing, ARP cache poisioning

    5.3 DOS

    • Classic DOS attacks: Ping flood, ICNP flood, UDP flood, Distributed DOS

    • Defenses against DOS attacks

    5.4 Firewall

    • Types
    • Attacks on firewall
    • Configurations
    • Limitations

    5.5 DMZ (Demilitarized zone)

    5.6 IDS (Intrusion Detection Systems)

    • Types
    • Technologies: Network based, Host based

    5.7 Honeypots

    Module 6: Network Security Applications

    6.1 Authentication Applications

    • Kerberos

    6.2 Internet Security Protocols

    • SSL
    • TLS
    • IPSec: Att, ESP

    6.3 Secure Email

    • PGP
    • S/MIME
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