[Bug 878906] Re: Not obvious that giving your account a password is not physical security

Matthew Paul Thomas mpt at canonical.com
Mon Oct 22 09:03:32 UTC 2012


If the "Encrypt the new Ubuntu installation for security" checkbox
explained that a password alone isn't physical security, and if people
would remember that explanation by the time they arrived at the "Who are
you?" step, that would be enough. But I don't think either of those is
the case. This needs a little design work.

** Changed in: ubiquity (Ubuntu)
       Status: Fix Released => Confirmed

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https://bugs.launchpad.net/bugs/878906

Title:
  Not obvious that giving your account a password is not physical
  security

Status in “gnome-control-center” package in Ubuntu:
  Triaged
Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  If you have a user account with a password, someone with physical
  access to your computer can still access your account by holding down
  Shift during startup, choosing recovery mode, and changing your
  password.

  This is an intractable problem. For example, from Microsoft's "10
  immutable laws of security": "If a bad guy has unrestricted physical
  access to your computer, it's not your computer anymore".
  <http://technet.microsoft.com/en-gb/library/cc722487.aspx#EIAA>

  However, probably it isn't obvious to a non-professional that a
  password alone isn't enough to secure their stuff.

  So perhaps, wherever Ubuntu lets you set a password (Ubiquity, System
  Settings "User Accounts"), it should contain a brief (very brief)
  explanation of this. Something like: "A password doesn’t protect
  against someone with physical access to the computer."

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