Re: MD5 & bot Question

A) 2 million MD5s is chump-change. B) Telling a "cat" from a "dog" is probably a homework exercise for AI Vision grad students. On Mon, April 9, 2007 3:35 pm, tedd wrote: > At 1:04 PM -0400 4/9/07, Robert Cummings wrote: >>On Mon, 2007-04-09 at 12:51 -0400, tedd wrote: >> >We were talking >> > about M$'s "picture" captcha where they show pictures and ask a >>> question like "Pick the picture that shows a kitty" and NOT an "on >>> the fly" graphic captcha. There are different types of captchas. >> >>Ah, I see. I was too lazy to go check since I don't use Microsoft >> except >>insofar as to make things work in their crappy browser. Either way, >> can >>you verify the images are static? See if getting two kitty cats >> produces >>the same md5 signature :) Just because it's a picture doesn't >> invalidate >>what I said. > > > I'm not out to validate, or invalidate, what you said. I'm just > making the point that a finite number of pictures is different than > an almost infinite number of "on the fly" generated graphic images. > > The "new" captcha M$ is trying, is to use pictures of objects and > have the user identify which are cat pictures, like so: > > http://research.microsoft.com/asirra/ > > The web site states that it has over two million pictures of cats and > dogs. This captcha requires that you simply to select ALL the cat > photos leaving the dog photos unchecked. After doing so, it checks > your score to allow entry. > > This one is different than the first one I saw, which presented only > one cat picture in several dog pictures -- I think I could break > that. But, this one is more difficult. > > Cheers, > > tedd > -- > ------- > http://sperling.com > http://ancientstones.com > http://earthstones.com > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So?