Tails 2.3 (The Amnesic Incognito Live System) Released 4-26-16

Tails is a live operating system, that you can start on almost any computer from a DVD, USB stick, or SD card. It aims at preserving your privacy and anonymity, and helps you to:

Use the Internet anonymously and circumvent censorship;
All connections to the Internet are forced to go through the Tor network;
Leave no trace on the computer you are using unless you ask it explicitly;
Use state-of-the-art cryptographic tools to encrypt your files, emails and instant messaging.