131–140 of 238 posts
A forum I run in Ireland doesn't have a need for Captchas. The forum is very regional and niche - no genuine foreign visitors - so we blocked every country apart from Ireland and the UK from posting comments. Result - no spam. This wouldn't work for many forums, but if it's local, you really don't need to open it to the world.
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I, for one, refuse to be used as the source of free labor by Google just because I want to sign up for a website.
That's ridiculous. reCAPTCHA isn't making you do more work, it's just making work you have to do anyway useful. The benefit Google gets from the OCR work is microscopic, and the world gets old books and New York Times articles.
I'm all in for crowdsourcing if you tell me about it and nicely ask me to participate. Not when I am forced to do it.
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Account gets locked just for that computer.
Oh, you mean just for that IP? Torify. Cookies? Bots don't need to accept them. Do you have something better?
Of course, if one ip is making too many requests, it gets blocked or captchaed
It's easy to criticize captchas. That's why there are so many articles like this, which we all knowingly nod along to as we read. It's much harder to provide productive criticism that leads to an actual improvement over the status quo. (Although it is easy to suggest bad alternatives to captchas, which is why they appear in every comment thread about captchas on Hacker News, including this one.)
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Captchas are hard because there's only so much an algorithm can extract from spatial information. Computers are excellent with temporal data, given essentially unlimited memory for past video frames. Computers benefit more from increased information than humans do.
This is computer vision, an I'm somewhat an expert in the area. I can tell that video sequence recognition is _much_ harder problem than image recognition. For example, if you would show an letter made out of random noise moving through random noise, current computer vision algorithms would not be able to recognize anything. And you would pick out that letter immediately. Human visual subsystem is really amazing in t…
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Take a look at our product at areyouahuman.com We launched in January and are using games to make them easier for people. Some of our early testing showed captchas can decrease signups by up to 25% and we're able to recover almost all of that. We also monitor how you play the game (like mouse movement) so we can ramp up our security without having to make the task more difficult for people. Read more here http://arey…
Given the nature of the games, you may want to consider renaming to areyounorthamerican.com...
I have no expertise in this area, but how about patterns? Since we're already parsing so much text, why not take strings of legible text (with a minor visual distortion), and strip a connecting word such as a preposition? The user is then prompted to enter the connecting word. Synonyms could be matched. For example: "I can't stand all ____ your lies" (of) or: "This is all too ____ for me to handle!" (much) Sure, some…
https://www.google.co.uk/search?q=%22I+cant+stand+all%22+%22... https://www.google.co.uk/search?q=%22This+is+all+too%22+%22f... Then pick the first search result where there is a single word between the segments.
A forum I run in Ireland doesn't have a need for Captchas. The forum is very regional and niche - no genuine foreign visitors - so we blocked every country apart from Ireland and the UK from posting comments. Result - no spam. This wouldn't work for many forums, but if it's local, you really don't need to open it to the world.