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Analyzing CAPTCHAs

Posted by CmdrTaco on from the i-fail-more-than-i-win dept.

Bruce Schneier's blog pointed me to a research paper on "Attacks and Design of Image Recognition CAPTCHAs" (PDF). The abstract says, "We systematically study the design of image recognition CAPTCHAs (IRCs) in this paper. We first review and examine all IRCs schemes known to us and evaluate each scheme against the practical requirements in CAPTCHA applications, particularly in large-scale real-life applications such as Gmail and Hotmail."

8 of 105 comments (clear)

  1. Re:PDF warning? by jolyonr · · Score: 0, Offtopic

    2nd link is a PDF. Thanks for the warning...

    I see they cunningly hid the pdf file in a link ending with the filename ccs10.pdf

    Don't you check what links are before you click them?

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    Please read my Canon EOS tech blog at http://www.everyothershot.com
  2. Re:PDF warning? by clone53421 · · Score: 0, Offtopic

    Not always when they’re in the summary...

    Sure, I probably should, but still...

    --
    Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
  3. Re:PDF warning? by ElectricTurtle · · Score: 0, Offtopic

    One wonders how many times he has been Rick Roll'd and Goatse'd.

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    I support the Slashcott and will not be reading or commenting from 2/10/14 to 2/17/14. Beta is steaming pile of dog shit
  4. Industry in WORLD 3-1 by tepples · · Score: 0, Offtopic

    Apparently we don't really need strong AI so long as we have cheap labor in the 3rd world.

    Then perhaps we need to send people down the tube at the end of world 1-2 to build roads and the like so that we can industrialize the 3rd world and make the labor more valuable.

    1. Re:Industry in WORLD 3-1 by ElectricTurtle · · Score: 0, Offtopic

      Uh, China's already doing that hardcore. Look up Vanguard's documentary called Chinatown, Africa.

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      I support the Slashcott and will not be reading or commenting from 2/10/14 to 2/17/14. Beta is steaming pile of dog shit
  5. Re:PDF warning? by gstoddart · · Score: 0, Offtopic

    And my apologies back to you and the rest of slashdot for using the phrase 'pdf file'

    Except, the F doesn't stand for File, it stands for Format.

    So, it most assuredly is a PDF file. It's not like saying "PIN Number", which is what you are implying.

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    Lost at C:>. Found at C.
  6. Re:Why not... by clone53421 · · Score: 0, Offtopic

    the actual correct spelling

    Well, the actual spelling is also the correct one. Thanks for that clarification!

    --
    Alexander Peter Kristopeit bought his basement from his mommy for one dollar.
  7. Re:PDF warning? by Kilrah_il · · Score: 0, Offtopic

    Yes, a big Whoosh flying way over your head.

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