Any user on a LAN can sniff and manipulate local traffic. ARP spoofing and poisoning techniques give an attacker an easy way in.

Encrypting a home directory is easy. Encrypting your whole hard disk – including the root filesystem – takes a little more effort.

If you’re not a security expert and you're looking for a crypto filesystem, you may be wondering about the alternatives. We took at a look at some popular crypto options for Linux.

Today’s computers are fast enough for some very sophisticated cryptography techniques. We’ll show you how to keep your data safe from the prying eyes of snoops and spies.

An encrypted hard disk on your server is no help if valuable data on CDs or DVDs falls into the hands of spies. We’ll show you some convenient solutions for encrypting data on removable media.

Linux has a fantastic selection of firewalls for securing stand-alone computers or whole networks. Although you can use IPTables to set up a firewall, the configuration is often the most difficult step. KMyFirewall offers a powerful, user-friendly, GUI-based approach.

Thunderbird offers several options for secure email, and the GnuPG-based Enigmail encryption add-on provides an additional layer of protection.

If you’re serious about keeping secrets, try hard disk encryption with DM-Crypt and LUKS.

We’ll show you how to build your own Netfilter extension with this example of a musical firewall.

The Anubis mail manipulation daemon lets you centralize encryption for outgoing mail.