Tails OS is a free operating system first released in 2009, designed to protect against malware, censorship, and surveillance. Notably utilized by Edward Snowden, this Debian-based Linux distro boots from a USB, ensuring activities are ephemeral with its “Amnesia” feature. It exclusively runs applications through the Tor Network, automatically encrypts files, and blocks non-Tor internet access. Ideal for journalists, it operates solely from computer memory, erasing traces upon shutdown and even overwriting RAM to prevent cold boot attacks. To use, simply flash it onto an 8GB USB stick and boot.