Re:Apple using moving letters as captcha
by codeka on Tuesday May 14, 2013 @06:40AM
(#5703991)
Sure, but it wouldn't take a lot of tuning to update a bot to read the animated frames and then you're back to square one. In fact, with 20-odd frames and only three (entirely upper-case!) letters to select it looks very easy to develop a bot that would get a very high success rate.
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Re:Apple using moving letters as captcha
by joelthelion on Tuesday May 14, 2013 @07:04AM
(#5704064)
Actually benefiting from the motion requires a new algorithm. Probably not that hard to design, but not trivial either.
As always CAPTCHA is a game of cat and mouse. When something is completely broken, you need to think up something new.
You don't actually need to use the motion to improve the success rate. Just run the normal algorithm on each frame and elect a winning solution.
Are the people using the captcha-breaking algorithms the ones developing them? Probably not. These things take time... the best way to combat them is probably to change what your captcha looks like and works like every week or so.