6 ms·

The world's hardest CAPTCHA

89 points by ascorbic 12y ago

meowface 12y ago
Despite this being intended as a joke, I feel like this would be a lot easier for a computer to solve than a human.
randunel 12y ago
UNSUCCESSFUL! Try Again: The other captcha seems easier. Good thing it's difficult, considering their contact page is on hn top page :D Later edit: as someone mentioned, the second one is easier and offensive. My guess is the request goes through anyway. Personally, I would have fun seeing (and publishing) what people draw :P
- bhouston 12y ago
  The second one always works. There is no check.
heavymark 12y ago
When you submit there is a solid image that shows profanity: http://www.geee.net/acids/cntpaint.gif http://www.geee.net/acids/cntpaint.gif. Pretty offensive and not appropriate for HackerNews.
- kysol 12y ago
  I thought I was just one of the lucky ones to get such an obscene message for a capture... way to spoil my excitement :P
- telecuda 12y ago
  I got the same thing for reference.
lucb1e 12y ago
Wrong. World's hardest CAPTCHA: harm or allow a human, through inaction, to be harmed. (It's a reference to two of Asimov's three laws)
- RBerenguel 12y ago
  Close tab counts as violating 3 then?
  - coldcode 12y ago
    I follow the zeroth law.
- mrspeaker 12y ago
  That's what I wrote the "humans.txt" captcha for: http://www.mrspeaker.net/2010/07/15/humans-txt/ http://www.mrspeaker.net/2010/07/15/humans-txt/ Keep those pesky humans away.
  - grimmdude 12y ago
    Metal Meter Madness is pretty sweet I must say
orf 12y ago
What an odd website: http://www.geee.net/blog.htm http://www.geee.net/blog.htm I can't quite get it. Is it a joke? The writer[1] seems incredibly paranoid that the CIA are poisoning him and keeps overhearing agent's talking about killing him. The Captcha is a joke, but it seems out of place with the rest of the content. 1. http://www.geee.net/543u5.htm http://www.geee.net/543u5.htm
- samwilliams 12y ago
  http://www.geee.net/mv.htm http://www.geee.net/mv.htm It does not appear to a joke. It seems an awful lot like paranoid schizophrenia...
  - dm2 12y ago
    http://www.geee.net/blog082.htm http://www.geee.net/blog082.htm This is a list of the recent posts. There's no way he could be this dedicated to a "joke" website. The recent events mentioned suggest that it's not just changing the times dynamically, so the posts are actually recent. That's just scary. I wonder what kind of life he lives with the extreme paranoia of MI5 messing with him constantly. He needs medication, and a hobby to keep him away from these thoughts. But, if he's not a harm to anyone or himself, then it should be 100% his choice to have medication or not. How did the OP stumble upon this website?
    - yebyen 12y ago
      "Unless, of course, MI5 actually have an obscene number of people on their books - perhaps as many as fifty thousand agents, which, if that is the case, means our 'democracy' is completely fucked." I am not sure what law or internet forum rule it is that says any sufficiently developed parody of being a kook is indistinguishable from being a real, honest to goodness kook... but browsing around this site I am quickly reminded of that adage.
      - personZ 12y ago
        Poe's Law is what you're looking for, I believe.
dbuxton 12y ago
My personal favourite is this one: http://random.irb.hr/signup.php http://random.irb.hr/signup.php Although Wolfram Alpha can actually solve these pretty easily.
deleted 12y ago
[deleted]
- bhouston 12y ago
  The second one always works, there is no programmatic validation.
  - ateevchopra 12y ago
    This was just for demonstrating the idea. It isn't for any use. As I said, it was when I started programming.
INTPenis 12y ago
I always thought this chess captcha I read about a while back was the toughest thing I had heard of. http://nakedsecurity.sophos.com/2013/03/12/chess-captcha/ http://nakedsecurity.sophos.com/2013/03/12/chess-captcha/
- 1ris 12y ago
  Chess seems to be the Anti-Captcha: Easy for computers to solve, but hard for humans.
  - pokpokpok 12y ago
    in this case, it's a filter for chess knowledge. pretty interesting for a chess forum!
- thathonkey 12y ago
  That's be great for when you only want computers to be able to solve it!
- jimmytidey 12y ago
  Presumably a Go captcha is the more effective, since computers are worse and Go than humans. [Provided you are a professional Go player...]
delinka 12y ago
Oh, I see. It's "hard" because it doesn't give me enough colors to choose from.
ateevchopra 12y ago
Back in my college days, I made this captcha as a class project. This is based on the popular snake game. You catch the bug with snake, you pass. If anyone interested, folk and make its web version. https://github.com/ateev/Snake--o--Captcha https://github.com/ateev/Snake--o--Captcha
hashtree 12y ago
No actual captcha checking going on (submit button in own form doing a GET, Flash does no external network calls verified via MITMProxy), as many have noted it seems to be a joke. However, this would be one of the easier captchas from a bot standpoint. You have the source image and only need to create the equivalent in another format (Flash)? Assuming no fancy bot checks in Flash, the process of duplication is trivial. The bot doesn't have to guess what it is, just duplicate and machines are great at that. In fact, this is more like an anti-captcha (hard for humans, easy for bots).
iagooar 12y ago
They should collect all those pieces of art and expose them in a gallery.
carlob 12y ago
Did I just read a 4-letter C word in my captcha? (the second one)
- crazcarl 12y ago
  I got that as well.
- danexxtone 12y ago
  Same here. My guess is that this is the actual captcha.
- wlv 12y ago
  http://www.geee.net/acids/cntpaint.gif http://www.geee.net/acids/cntpaint.gif
harsh1618 12y ago
And here's the world's easiest http://www.indianrail.gov.in/pnr_Enq.html http://www.indianrail.gov.in/pnr_Enq.html. It's just text and not an image.
DyslexicAtheist 12y ago
a captcha so fiendishly difficult only a computer can solve it
thomaspark 12y ago
Made this a little while back: CRAPCHA (Completely Ridiculous And Phony Captcha that Hassles for Amusement) http://crapcha.com http://crapcha.com
peterwwillis 12y ago
At this point I think the only captchas that would be reliable are ones that trade on the inherently illogical nature of human decision-making. Ask people questions or give them things to solve that they will initially answer illogically due to their human biases. A computer, even if it could answer correctly, would have to learn about how humans make decisions, or how perception causes us to view certain things differently. You'd have to create an AI smart enough to make bad decisions like a human in order to beat it.

89 points by ascorbic 12y ago

Despite this being intended as a joke, I feel like this would be a lot easier for a computer to solve than a human.

UNSUCCESSFUL! Try Again: The other captcha seems easier. Good thing it's difficult, considering their contact page is on hn top page :D Later edit: as someone mentioned, the second one is easier and offensive. My guess is the request goes through anyway. Personally, I would have fun seeing (and publishing) what people draw :P

bhouston 12y ago
The second one always works. There is no check.

heavymark 12y ago

When you submit there is a solid image that shows profanity: http://www.geee.net/acids/cntpaint.gif http://www.geee.net/acids/cntpaint.gif. Pretty offensive and not appropriate for HackerNews.

kysol 12y ago
I thought I was just one of the lucky ones to get such an obscene message for a capture... way to spoil my excitement :P
telecuda 12y ago
I got the same thing for reference.

lucb1e 12y ago

Wrong. World's hardest CAPTCHA: harm or allow a human, through inaction, to be harmed. (It's a reference to two of Asimov's three laws)

RBerenguel 12y ago
Close tab counts as violating 3 then?
- coldcode 12y ago
  I follow the zeroth law.
mrspeaker 12y ago
That's what I wrote the "humans.txt" captcha for: http://www.mrspeaker.net/2010/07/15/humans-txt/ http://www.mrspeaker.net/2010/07/15/humans-txt/ Keep those pesky humans away.
- grimmdude 12y ago
  Metal Meter Madness is pretty sweet I must say

orf 12y ago

What an odd website: http://www.geee.net/blog.htm http://www.geee.net/blog.htm I can't quite get it. Is it a joke? The writer[1] seems incredibly paranoid that the CIA are poisoning him and keeps overhearing agent's talking about killing him. The Captcha is a joke, but it seems out of place with the rest of the content. 1. http://www.geee.net/543u5.htm http://www.geee.net/543u5.htm

samwilliams 12y ago
http://www.geee.net/mv.htm http://www.geee.net/mv.htm It does not appear to a joke. It seems an awful lot like paranoid schizophrenia...
- dm2 12y ago
  http://www.geee.net/blog082.htm http://www.geee.net/blog082.htm This is a list of the recent posts. There's no way he could be this dedicated to a "joke" website. The recent events mentioned suggest that it's not just changing the times dynamically, so the posts are actually recent. That's just scary. I wonder what kind of life he lives with the extreme paranoia of MI5 messing with him constantly. He needs medication, and a hobby to keep him away from these thoughts. But, if he's not a harm to anyone or himself, then it should be 100% his choice to have medication or not. How did the OP stumble upon this website?
  - yebyen 12y ago
    "Unless, of course, MI5 actually have an obscene number of people on their books - perhaps as many as fifty thousand agents, which, if that is the case, means our 'democracy' is completely fucked." I am not sure what law or internet forum rule it is that says any sufficiently developed parody of being a kook is indistinguishable from being a real, honest to goodness kook... but browsing around this site I am quickly reminded of that adage.
    - personZ 12y ago
      Poe's Law is what you're looking for, I believe.

dbuxton 12y ago

My personal favourite is this one: http://random.irb.hr/signup.php http://random.irb.hr/signup.php Although Wolfram Alpha can actually solve these pretty easily.

deleted 12y ago

[deleted]

bhouston 12y ago
The second one always works, there is no programmatic validation.
- ateevchopra 12y ago
  This was just for demonstrating the idea. It isn't for any use. As I said, it was when I started programming.

INTPenis 12y ago

I always thought this chess captcha I read about a while back was the toughest thing I had heard of. http://nakedsecurity.sophos.com/2013/03/12/chess-captcha/ http://nakedsecurity.sophos.com/2013/03/12/chess-captcha/

1ris 12y ago
Chess seems to be the Anti-Captcha: Easy for computers to solve, but hard for humans.
- pokpokpok 12y ago
  in this case, it's a filter for chess knowledge. pretty interesting for a chess forum!
thathonkey 12y ago
That's be great for when you only want computers to be able to solve it!
jimmytidey 12y ago
Presumably a Go captcha is the more effective, since computers are worse and Go than humans. [Provided you are a professional Go player...]

delinka 12y ago

Oh, I see. It's "hard" because it doesn't give me enough colors to choose from.

ateevchopra 12y ago

Back in my college days, I made this captcha as a class project. This is based on the popular snake game. You catch the bug with snake, you pass. If anyone interested, folk and make its web version. https://github.com/ateev/Snake--o--Captcha https://github.com/ateev/Snake--o--Captcha

hashtree 12y ago

No actual captcha checking going on (submit button in own form doing a GET, Flash does no external network calls verified via MITMProxy), as many have noted it seems to be a joke. However, this would be one of the easier captchas from a bot standpoint. You have the source image and only need to create the equivalent in another format (Flash)? Assuming no fancy bot checks in Flash, the process of duplication is trivial. The bot doesn't have to guess what it is, just duplicate and machines are great at that. In fact, this is more like an anti-captcha (hard for humans, easy for bots).

iagooar 12y ago

They should collect all those pieces of art and expose them in a gallery.

carlob 12y ago

Did I just read a 4-letter C word in my captcha? (the second one)

crazcarl 12y ago
I got that as well.
danexxtone 12y ago
Same here. My guess is that this is the actual captcha.
wlv 12y ago
http://www.geee.net/acids/cntpaint.gif http://www.geee.net/acids/cntpaint.gif

harsh1618 12y ago

And here's the world's easiest http://www.indianrail.gov.in/pnr_Enq.html http://www.indianrail.gov.in/pnr_Enq.html. It's just text and not an image.

DyslexicAtheist 12y ago

a captcha so fiendishly difficult only a computer can solve it

thomaspark 12y ago

Made this a little while back: CRAPCHA (Completely Ridiculous And Phony Captcha that Hassles for Amusement) http://crapcha.com http://crapcha.com

peterwwillis 12y ago

At this point I think the only captchas that would be reliable are ones that trade on the inherently illogical nature of human decision-making. Ask people questions or give them things to solve that they will initially answer illogically due to their human biases. A computer, even if it could answer correctly, would have to learn about how humans make decisions, or how perception causes us to view certain things differently. You'd have to create an AI smart enough to make bad decisions like a human in order to beat it.