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Ha, by this logic, a large majority of the current world population aren't humans :)
Well, to be fair the easiest captcha's are easy high school level equations and (as someone else already pointed out) if you can't solve these you have no business obtaining an account for extremely high quality quantum random numbers. (I believe they provide about 7.8 or 7.9 bits of entropy per byte)
I don't think it would be hard to do, in fact, they reverse the whole point of a CAPTCHA. A CAPTCHA is supposed to be a task that is easy for humans, but difficult for computers. High-level mathematics is difficult for humans but easy for computers. They do have some success of telling computers and humans apart, though.
Stops those pesky humans wasting precious robot bandwidth and is quite a bit harder than the Quantum Random Bit Generator captcha ;)
Ha, by this logic, a large majority of the current world population aren't humans :)
It's just a little more targeted than the average captcha. It should weed out both bots and people you wouldn't want using the website in the first place.
And flip the terms and answers for each captcha.
Is it because a person can't solve 3+8?
As a side question, why are captchas using alphanumerics? Any reason why you can say, what is 1+1? And flip the terms and answers for each captcha. Is it because a person can't solve 3+8?
All this does is simplify the captcha for machines to solve, whilst complicating it for humans (basic maths is easy for most but it's still one more logical step then 'type out the 5 letters you see'). Instead of 26 upper and lower-case characters, and often just a random string (so we can't make a best guess vs a dictionary), we now just have ten characters and maybe 2-4 mathematical operators and it must make sense (it can't be "42+-" for example).
As a side question, why are captchas using alphanumerics? Any reason why you can say, what is 1+1? And flip the terms and answers for each captcha. Is it because a person can't solve 3+8?
Because a computer is very good at solving basic maths questions? All this does is simplify the captcha for machines to solve, whilst complicating it for humans (basic maths is easy for most but it's still one more logical step then 'type out the 5 letters you see'). Instead of 26 upper and lower-case characters, and often just a random string (so we can't make a best guess vs a dictionary), we now just have ten char…
I asked this because I was creating a reddit clone and wanted a captcha system. I detest the ones that exist right now.
http://random.irb.hr/latexrender/pictures/bba40bf17043b0ced7...
People who don't understand security: stop pretending you understand security.
The reason captchas look stupid is so OCR can't run on them.
The reason captcha's aren't math is because computers are far better at math than humans.
