2. Cryptography

Syllabus Points Covered

Secure software architecture

Developing secure code

• Apply security features incorporated into software including data protection, security, privacy and regulatory compliance

  • encryption

  • hashed passwords

• Use and explain the contribution of cryptography and sandboxing to the ‘security by design’ approach in the development of software solutions

  • cryptography

Programming for the web

Data transmission using the web

• Explain the processes for securing the web

  • encryption algorithms

  • encryption keys

  • plain text and cipher text

  • hash values

Chapter Contents

• 2.1. Cryptography
  • 2.1.1. Why Is Cryptography Important?
  • 2.1.2. What Will We Cover?
  • 2.1.3. Looking Ahead
  • 2.1.4. Recommended Video
  • 2.1.5. Glossary
• 2.2. Ciphers
  • 2.2.1. Using Ciphers
  • 2.2.2. Types of Ciphers
  • 2.2.3. Glossary
• 2.3. Substitution Ciphers
  • 2.3.1. Example 1
  • 2.3.2. Example 2
  • 2.3.3. Example 3: Caesar Cipher
  • 2.3.4. Glossary
  • 2.3.5. Example 4: Simple Substitution With Key
• 2.4. Symmetric-key Cryptography
  • 2.4.1. Simple Example
  • 2.4.2. In Practice
  • 2.4.3. Glossary
• 2.5. Asymmetric-key Cryptography
  • 2.5.1. Sending Encrypted Messages
  • 2.5.2. Proof Of Identity
  • 2.5.3. In Practice
  • 2.5.4. RSA Encryption
  • 2.5.5. Elliptic Curve Cryptography
  • 2.5.6. Speed
  • 2.5.7. Data Size and Key Size
  • 2.5.8. Combining Asymmetric and Symmetric Encryption
  • 2.5.9. Glossary
  • 2.5.10. Recommended Video
• 2.6. Hashing
  • 2.6.1. Data Integrity
  • 2.6.2. Bins and Collisions
  • 2.6.3. Recommended Video
  • 2.6.4. Glossary
• 2.7. Cryptographic Hash Functions
  • 2.7.1. Preimage Resistance
  • 2.7.2. Collision Resistance
  • 2.7.3. Recommended Video
  • 2.7.4. Glossary