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Absolutely love it. Unusual captcha's are great. Reminded me of this one: http://random.irb.hr/signup.php http://random.irb.hr/signup.php
by sugarkjube 3y ago
Absolutely love it. Unusual captcha's are great.
Reminded me of this one: http://random.irb.hr/signup.php http://random.irb.hr/signup.php
- esaym 3y agoFunny. I made a captcha challenge of calculus problems for a comment section on my personal blog page. But 5 years after college, I couldn't remember how to even do them myself so I changed it :-/
- iopq 3y agowolfram alpha can do it for you
- em-bee 3y agoafter reloading a dozen times i finally got one that i could solve: -3 * 3 + (-3) = ?
- jakderrida 3y agoI just got one I think I can solve: 0 + 7 + 0 = ? Where's my calculator?
- defrost 3y agoBond, Jim Bond ?
- onlyrealcuzzo 3y agoCan I play by an audio call if I'm visually impared?
- Keyframe 3y agoYes, when you hear a monster roar you say BANG!
- evgpbfhnr 3y agoYou don't actually need much, for a form I used to get spam in I just added a "write 42 here" so anyone who actually cares to read would be able to fill it. spam fell to 0. (for a site with a slightly higher profile this wouldn't be enough, but for a minor corner of the internet with no ill intent actually aimed at it that turned out to be enough to block the fuzzing "fill all the forms" spam)
- kqr 3y agoSimilarly an empty input field that is css'd to be outside the viewport is often filled by spambots but not humans. But I like the edge case UX of your idea more.
- jeffhuys 3y agoJust watch out that Chrome’s autofill doesn’t fill it in. Cost us a huge chunk of new signups until we found out. Chrome ignores autofill directives under some circumstances.
- kqr 3y agoIt's also visible for users with CSS overrides and/or other browser inpairments. The more I think about it the more strongly I prefer the "type 42" explicit input field.
- thih9 3y agoYou can label it “leave this field empty”, with a placeholder or similar - then it’s the same explicit instruction as “type 42”.
- electroly 3y agoAs contrasting experience, I did that (a simple math problem) on our contact form and it did NOT drop spam to zero; our spammers were too smart for that. Even an actual reCAPTCHA didn't completely eliminate it (although it mostly did, enough that it's fine for us).
- koito17 3y agoThe question I got was surprisingly simple: it asked to find "the least real root of the polynomial p(x) = (x+5)(x-4)(x+1)". A determined attacker can quickly hack together something with Tesseract and feed it into even GPT-3.5 to get the correct answer to questions like these. I guess that means the captcha is doing its job, since running LLMs isn't very cheap or scalable. But any harder problem means you start filtering a significant chunk of human users. Based on the other replies to your comment, it seems that the questions at their current difficulty already stop a lot of human users, yet allow a determined attacker with the setup I described pass through easily.
- explaininjs 3y agoI'm not sure how you'd determine the least real root to that, given all three have equally zero imaginary component.
- baud147258 3y agoI remember an old (and now defunct) fan site who hit you with lore questions as a captcha. Though I'd guess a LLM could answer
- marvinborner 3y agoOr the one on esolangs.org where you need to evaluate some random Befunge code.
- nottorp 3y agoI got "find the last real zero of the polynomial..." but what does last mean? Largest? Last as the polynomial's factors are given? Something else? Edit: oh wait. It's "least". I really have no idea then :)
- Kwpolska 3y agoThe first one I got was 7 * 7 + (-3). That’s trivial, elementary-school-level math, and did they really need LaTeX to render that? Then I refreshed the page, and was hit with calculus involving trig functions.