Expand Cryptography Basics with more examples and details

[patjenkinsGIT]

The current Cryptography Basics section provides a good overview, but it could benefit from more detailed explanations and practical examples.

Tasks:

• [x] Add more examples of symmetric encryption algorithms (e.g., 3DES, Blowfish)
• [x] Provide a simple explanation of how asymmetric encryption works
• [x] Include a diagram illustrating the difference between symmetric and asymmetric encryption
• [x] Add CA Hierarchies Diagram and add a 03_Cert_Authorities.md file
• [ ] Add a subsection on key management basics
• [ ] Incorporate a simple code snippet demonstrating a hash function

This expansion will provide readers with a more comprehensive understanding of cryptographic concepts fundamental to PKI.

[patjenkinsGIT]

Accidentally closed - reopening issue