Unit 732: Comprehensive Cryptography

1. Introduction to Cryptography

• Definition and importance of cryptography
• Goals: Confidentiality, Integrity, Authentication, Non-repudiation
• Historical overview
  • Ancient cryptographic techniques (e.g., Caesar cipher)
  • Evolution to modern cryptography

2. History of Cryptography

• Origins of cryptographic methods
• Classical ciphers and their limitations
• Development through World War eras
• Transition to computational cryptography

3. Symmetric Cryptography

• Concept of symmetric key encryption
• Key algorithms:
  • Data Encryption Standard (DES)
  • Advanced Encryption Standard (AES)
• Modes of operation (CBC, ECB, etc.)
• Applications in data communication and storage
• Strengths and weaknesses

4. Asymmetric Cryptography

• Concept of public and private key pairs
• Key algorithms:
  • RSA (Rivest-Shamir-Adleman)
  • Elliptic Curve Cryptography (ECC)
  • Diffie-Hellman key exchange
• Uses in secure communication, key exchange, digital signatures
• Comparison with symmetric cryptography

5. Cryptographic Hash Functions

• Definition and characteristics
  • One-way functions
  • Collision resistance
  • Preimage resistance
• Common hash functions: MD5, SHA family (SHA-1, SHA-2, SHA-3)
• Applications:
  • Data integrity verification
  • Password hashing
  • Digital signatures

6. Digital Signatures

• Purpose and importance
• Creation process using public key cryptography
• Verification mechanisms
• Use cases in authentication and non-repudiation

7. Cryptographic Protocols

• Overview of protocols securing communications
• SSL/TLS protocols:
  • History and evolution
  • Handshake process
  • Encryption, authentication, and data integrity
• Other protocols:
  • IPsec
  • VPN security
• Implementation considerations

8. Cryptanalysis

• Definition and goals
• Common cryptanalysis techniques:
  • Brute force attacks
  • Frequency analysis
  • Differential cryptanalysis
• Impact on cryptographic algorithm design and security

9. Quantum Cryptography

• Principles of quantum mechanics relevant to cryptography
• Quantum key distribution (QKD): BB84 protocol
• Potential for unconditional security
• Challenges and current research

10. Cryptographic Applications

• Secure messaging platforms
• Digital currencies and blockchain technology
• Cloud security and data protection

11. Cryptographic Standards and Compliance

• Overview of major standards:
  • FIPS (Federal Information Processing Standards)
  • NIST guidelines
• Legal and regulatory frameworks:
  • GDPR
• Importance of compliance and interoperability

12. Future Trends in Cryptography

• Homomorphic encryption
• Post-quantum cryptography
• Impact of artificial intelligence and machine learning on cryptography
• Emerging challenges and opportunities