1. What are Data Breaches?.- 2. Brief History of Cryptography.- 3. The Importance of Random Numbers.- 4. Hashing and Hashed Message Authentication Codes.- 5. Safely Storing Passwords.- 6. Symmetric Encryption.- 7. Asymmetric Encryption.- 8. Digital Signatures.- 9. Hybrid Encryption.- 10. Key Storage and Azure Key Vault.- 11. Azure Key Vault Usage Patterns.- 12. Final Summary.