In many cases, it's nice to know if a valid SSH login was performed on your server. To get an information if someone accessed your server via SSH, it's possible to configure a notification per mail. To keep the information about the login process private, you can use PGP to encrypt the content of the notification. Therefore, this tutorial should show how to setup an encrypted notification for valid SSH logins. The setup was tested with the operating system Debian 8 (Jessie).

Because many people aren't familiar with PGP encryption, a blog post about PGP, how it works and how to use it. This post is only a brief description about PGP and covers not all details. Pretty-Good-Privacy (PGP) is an encryption technology mainly used for sending encrypted email, but also in use to encrypt texts, files or even whole disk partitions.