In the modern digital age, secrets and privacy are things of the past, they have become obsolete. There are no more secrets in the world. Someone or the other is always watching, reading your emails, listening to your phone calls. The need for security has increased in this age and thus many software manufacturers are coming out with more and more powerful firewalls. You can also see Security Icons. These firewalls are designed to keep intruders from sniffing about in your computer. It is essentially a wall inside which you lock yourself to remain safe. The Free PSD Icons of the firewall software are professionally designed by experts and this icon pack is free to download.