Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment That's some funny shit (Score 1) 96

Good idea- replicate and rev up a natural system, and just farm the P from sewer plants in Jurassic Park. You ever run across a pile of dinosaur shit? It ain't pretty, but sometimes when I get the munchies I think of all that delicious P I could have scooped off, probably more P than those bags of Cheetos in my closet.

Comment Small problem set (Score 3, Interesting) 52

There are two problems with higher-order processing CAPTCHAs like that. One is the small problem set. A human at the website has to actually think of those connections between plugs and sockets, or umbrellas and rainstorms, or pizza and ovens, or hair and shampoo, etc. So the problem space is small. Then, blindly guessing answers still yields a decent success rate. Your particular example can be guessed with a success rate of 1 in 256.

Blurring a pair of words from a dictionary onto each other automatically generates millions of possible challenges, and random guessing won't work as well- at least some image analysis is needed.

My own idea for a CAPTCHA is to use images from Google Street View. Show random street view images of a bunch of houses, and ask, "what's the house number"? That would probably take a while to crack, long enough for me to dump my startup site's shares before all the porn gets leaked- if not for those assholes at Google interfering.

Comment Re:AmIHotOrNot (Score 2) 52

Actually, if you do a google image search and actually look at SnapChat's "CAPTCHA", it's unbelievable, like a piece of work from the nineties.

It shows you nine images and asks you to select the ones where the ghost appears. (Random selections net 1 success in 512 right there, and they probably won't show you zero, one, eight, or nine ghosts, increasing success rates to 492 to 1.)

Notice that a ghost or its impostor is always the only white shape in the image. (Sometimes there are also a few white stars, moons, etc.) To improve from random guessing, isolate the white blob, select its center of mass, transform the outline into polar coordinates, perform a Fourier transform, prepare a vector from the Fourier coefficients, and all the ghosts will cluster together in that vector space. (There will also be a star cluster, an apple cluster, a tree trunk cluster, a top hat cluster, a full moon cluster, etc.)

Comment Re:"Hickson equates Snapchat's ghost very particul (Score 2) 52

EMFDYSI?

Fix his sentence by swapping two verbs and add a preposition:

"Hickson calls Snapchat's ghost very particular and equates it to a template that can be matched easily using a computer program."

See? I'm a human, man.

As for "EMDYSI?", I thought that was a CAPTCHA for a second and was about to prove my humanity with an eight-character response.

Comment NSA is here to stay (Score 0) 338

You're already signed up. You don't need to press a "share" button for anything. There's no need to spend time wondering whether they're now sneakily holding on to info they shouldn't- the answer is just "yes". You don't get an annoying email every time someone you know gets heartburn. No dumb comments, no stupid advertising. There's no "friends list" to manage, no "unfriend this person" fights- they manage your friends list for you. Someone is always following you and finds you interesting. They're already synced with all your information from other sites. Their stuff works with your phone. New exciting data collection features are coming out all the time. You're already paying for it, so you might as well join, and in fact you did already. It's so easy to use.

Slashdot Top Deals

The moon is made of green cheese. -- John Heywood

Working...