Security Strategies in Linux Platforms and Applications, 3rd Edition

Protecting Networks Using Encrypted Communication

While network communications is generally being moved by the requirements of users and businesses to being encrypted from end-to-end across the board, we aren’t completely there. Some places will still use protocols like FTP for file transmission that may not include encryption for file transfer. As another example, email is commonly sent from end to end in plaintext, though if you are using a webmail interface, the communication between you and the web server is encrypted. However, once the protocol moves from HTTP, which is you to the web server, to SMTP, which is the Simple Mail Transfer Protocol, and the message is being sent from one mail server to another, it’s likely the communication ...