General Potential security issue with the pattern unlock

Discussion in 'Android Devices' started by blackeyedbrian, Oct 21, 2008.

  1. blackeyedbrian

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    Oct 15, 2008
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    Most people will probably never notice this or never care, but here's what I noticed.

    If you unlock the screen and make a call, and don't use the touchscreen much at all, someone can pick up the phone and look at the smudges on the screen and see your unlock pattern. I tried this with my daughters phone earlier and was able to unlock it without previously knowing her code.


    I guess the tip is to wipe the screen off before you leave it unattended.
     

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  2. johnkzin

    johnkzin Well-Known Member
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    Sep 28, 2008
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    Or use a pattern that overlaps itself (using the same vertex more than once) so that they can't tell what direction you went...

    For example, if you just make a non-overlapping line, though, there's only 2 possible starting places and each one determines the direction of travel. So, if you can see the squiggle, you can break in with only 2 tries.

    But, if you use a full circle, there's 8 possible starting places, and two possible directions of travel. That requires 16 tries.

    There's room for a LOT more complexity from there.

    But, yes, it's also a good idea to wipe off your screen :)
     
  3. sleebus.jones

    sleebus.jones Well-Known Member
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    Sep 27, 2008
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    Houston, TX
    The ultimate security system is to keep it on your person. :)
     
  4. coyote121403

    coyote121403 Member
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    Oct 17, 2008
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  5. RobPuba

    RobPuba Member
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    Oct 2, 2008
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    Brooklyn, New York
    I second that :D
     
  6. punkzanyj

    punkzanyj Well-Known Member
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    Oct 20, 2008
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    or you make a pattern that's more complicated than 4 dots. I don't think there's a limit
     
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