TAILS Linux 1.8.1 is out (Dec 19, 2015)

https://tails.boum.org/
https://tails.boum.org/news/version_1.8.1/index.en.html
https://twitter.com/Tails_live/status/678313526780403712
https://tails.boum.org/security/Numerous_security_holes_in_1.8/index.en.html

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tails (1.8.1) unstable; urgency=medium

  * Security fixes
    - Upgrade Tor Browser to 5.0.6.
    - Upgrade Linux to 3.16.7-ckt20-1+deb8u1
    - Upgrade gdkpixbuf to 2.26.1-1+deb7u3
    - Upgrade bind9 tools to 1:9.8.4.dfsg.P1-6+nmu2+deb7u8

  * Bugfixes
    - Fix time synchronization in bridge mode by refreshing our patch
      against Tor's AppArmor profile.

 -- Tails developers <tails@boum.org>  Fri, 18 Dec 2015 19:05:18 +0000

- https://git-tails.immerda.ch/tails/plain/debian/changelog

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"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."

Learn more about Tails:
https://tails.boum.org/about/index.en.html