<p>If you receive the error message while running Tails using <i>virt-manager</i>, then you need to [[run Tails from our USB image|doc/advanced_topics/virtualization/virt-manager#usb_image]] instead of our ISO image.</p>
<p>We recommend choosing a long passphrase made of 5 to 7 random words. <a href="https://theintercept.com/2015/03/26/passphrases-can-memorize-attackers-cant-guess/">Learn about the maths behind memorizable and secure passphrases.</a></p>
