Tails

Tails, or "The Amnesic Incognito Live System", is a security-focused Debian based Linux distribution running on a computer, aimed at preserving privacy and anonymity against surveillance. It connects to the Internet exclusively through the anonymity overlay network Tor. The system is designed to be booted as a live DVD or live USB and never writes to the hard drive or SSD, leaving no digital footprint on the machine unless explicitly told to do so. Though the system can also run as a virtual machine, running Tails in a virtual machine is potentially insecure.