Drawing of End-to-end Authentication Between Two Hosts

Below, is a drawing I created for my CS 464 course. The image represents End-to-end authentication and encryption desired between two hosts. The drawing solidifies this representation because it reflects:

1. Transport adjacency with encryption applied before authentication.
2. A transport SA bundled inside a tunnel SA with encryption applied before authentication.
3. A transport SA bundled inside a tunnel SA with authentication applied before encryption.