Security in Computer Networks

• Security Requirements
• Secret Key Encryption
• Secret Key Encryption
• Secret Key: A Simple Example
• Block Encryption
• Cipher Block Chaining (CBC)
• DES and 3DES
• Advanced Encryption Standard (AES)
• Ron's Cipher 4 (RC4)
• Key Distribution
• Secret Key Encryption: Review
• Home Exercises
• Homework 8A
• Public Key Encryption
• Public Key Encryption
• Public Key Encryption Method
• Modular Arithmetic
• RSA Public Key Encryption
• RSA Algorithm: Example
• Homework 8B
• Confidentiality
• Diffie-Hellman Key Agreement
• Hash Functions
• MD5 Hash
• SHA-1 Algorithm
• Message Authentication Code (MAC)
• Digital Signature
• Digital Certificates
• Oligarchy Example
• Sample X.509 Certificate
• Public Key Encryption: Review
• Review Exercises
• IPSec, VPN, Firewalls
• IPSec
• Tunnel vs. Transport Mode
• Authentication Header
• AH ICV Computation
• ESP Packet
• Encapsulating Security Payload (ESP)
• Homework 8C
• What is a VPN?
• PPTP
• Firewall
• Application Gateways: Proxy Servers
• Types of IDS
• Signature Based IDS
• IPSec, VPN, Firewalls: Review
• Review Exercises
• Secure Email, SSL, IKE,WEP
• Secure E-Mail
• Pretty Good Privacy (PGP)
• SSL
• Handshake Protocol
• IKE Phases
• IKE Modes and Authentication Methods
• Wired Equivalent Privacy (WEP)
• WEP Details
• WEP Encapsulation
• WEP Decapsulation
• WEP Authentication
• WEP Review
• Problems with WEP Authentication
• Secure Email, SSL, IKE,WEP: Review
• Review Exercises
• Homework 8D

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