Instructor Materials – Chapter 7: Cryptographic Systems

Chapter Outline:

7.0 Introduction
7.1 Cryptographic Services
7.2 Basic Integrity and Authenticity
7.3 Confidentiality
7.4 Public Key Cryptography
7.5 Summary

Section 7.1: Cryptographic Services

Topic 7.1.1: Securing Communications

• Authentication, Integrity, and Confidentiality
• Authentication
• Data Integrity
• Data Confidentiality

Topic 7.1.2: Cryptography

• Creating Ciphertext
• Transposition Ciphers
• Substitution Ciphers
• One-Time Pad Ciphers

Topic 7.1.3: Cryptanalysis

• Cracking Code
• Methods for Cracking Code
• Methods for Cracking Code

Topic 7.1.4: Cryptology

• Making and Breaking Secret Codes
• Cryptanalysis
• The Secret is in the Keys

Section 7.2: Basic Integrity and Authenticity

Topic 7.2.1: Cryptographic Hashes

• Cryptographic Hash Function
• Cryptographic Hash Function Properties
• Well-Known Hash Functions

Topic 7.2.2: Integrity with MD5, SHA-1, and SHA-2

• Message Digest 5 Algorithm
• Secure Hash Algorithm
• MD5 Versus SHA

Topic 7.2.3: Authenticity with HMAC

• Keyed-Hash Message Authentication Code
• HMAC Operation
• Hashing in Cisco Products

Topic 7.2.4: Key Management

• Characteristics of Key Management
• Key Length and Keyspace
• The Keyspace
• Types of Cryptographic Keys
• Choosing Cryptographic Keys

Section 7.3: Confidentiality

Topic 7.3.1: Encryption

• Two Classes of Encryption Algorithms
• Symmetric and Asymmetric Encryption
• Symmetric Encryption
• Symmetric Block Ciphers and Stream Ciphers
• Choosing an Encryption Algorithm

Topic 7.3.2: Data Encryption Standard

• DES Symmetric Encryption
• DES Summary
• Improving DES with 3DES
• 3DES Operation
• AES Origins
• AES Summary

Topic 7.3.3: Alternate Encryption Algorithms

• Software-Optimized Encryption Algorithm (SEAL)
• RC Algorithms

Topic 7.3.4: Diffie-Hellman Key Exchange

• Diffie-Hellman (DH) Algorithm
• DH Operation

Section 7.4: Public Key Cryptography

Topic 7.4.1: Symmetric Versus Asymmetric Encryption

• Asymmetric Key Algorithms
• Public Key + Private Key = Confidentiality
• Private Key + Public Key = Authenticity
• Asymmetric Algorithms
• Types of Asymmetric Algorithms

Topic 7.4.2: Digital Signatures

• Using Digital Signatures
• Code Signing
• Digital Certificates
• Using Digital Certificates
• Digital Signature Algorithms

Topic 7.4.3: Public Key Infrastructure

• Public Key Infrastructure Overview
• PKI Framework
• Certificate Authorities
• Interoperability of Different PKI Vendors
• Public-Key Cryptography Standards
• Simple Certificate Enrollment Protocol
• PKI Topologies
• Registration Authority
• Digital Certificates and CAs

Section 7.5: Summary

Chapter Objectives:

• Explain the areas of cryptology.
• Explain to two kinds of encryption algorithms.