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The article claims that a 1% failure rate is considered too high. Random guessing gets you over 1% success on your example. Making it larger helps, but makes
by cbr 15y ago
The article claims that a 1% failure rate is considered too high. Random guessing gets you over 1% success on your example. Making it larger helps, but makes it harder too.
The bigger problem is: where do you get a giant source of kitten and puppy pictures that the spammers don't also have access to? It needs to be large enough that it's not worth it for the spammers to sit down and manually categorize them. It needs to be difficult to replicate because if you're just taking 10K pictures of each from an image search, the spammers can do that too.
- jakubw 15y agoWell, a few months ago I had my go at a service that would use data from people working on machine learning systems so I guess that part is not a big deal. The bigger problem is people are accustomed to typical 'write down the word' CAPTCHAs and yet, they're fed up with them, so anything different would only be more annoying and hardly more secure. It's also hard to think of a challenge type that would have enough combinations for blind guessing to be ineffective and not be of the text-based type we all know. You'd need dozens of kitten and puppy pictures in one challenge to have a reasonable failure rate and no one will be interested in solving those.
- Meai 15y agohttp://research.microsoft.com/en-us/um/redmond/projects/asirra/ http://research.microsoft.com/en-us/um/redmond/projects/asir...