Mastering Linux Security and Hardening - Second Edition

Hands-on lab – encrypting files with public keys

In this lab, you'll learn about how to encrypt and share a file with GPG public key encryption:

1. To begin, create a user account for Frank, as you did for Maggie in the previous lab.
2. Create a key set for both yourself and for Frank, as I've already shown you. Next, extract your own public keys into an ASCII text file. Log in as Frank, and extract his public key:

cd .gnupggpg --export -a -o donnie_public-key.txt

Log in as Frank, and repeat this command for him.

3. Normally, the participants in this would send their keys to each other either through an email attachment or by placing the keys in a shared directory. In this case, you and Frank will receive each other's public key files and place ...