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Memberlist Spam help

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16 years 8 months ago #53178 by michaeloconnell
Replied by michaeloconnell on topic Re: Memberlist Spam help
I came across a website that asked the user this question during the sign-up process:
"What is four plus eight?"
with the user haivng to write the answer in writing as "twelve"
I presume the software can allow different questions to be asked from time to time?

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16 years 8 months ago #53180 by voyager
Replied by voyager on topic Re: Memberlist Spam help

I came across a website that asked the user this question during the sign-up process:
"What is four plus eight?"
with the user haivng to write the answer in writing as "twelve"
I presume the software can allow different questions to be asked from time to time?


The problem is that it is again trivially easy to write software to do simple arithmetic like that, even if it is written in "natural language".

Bart.

My Home Page - www.bartbusschots.ie

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16 years 8 months ago #53182 by michaeloconnell
Replied by michaeloconnell on topic Re: Memberlist Spam help
Could be a question be asked like "What's the capital city of Ireland?" for example, and have a database of questions which will be randomly asked?

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16 years 8 months ago #53183 by voyager
Replied by voyager on topic Re: Memberlist Spam help

Could be a question be asked like "What's the capital city of Ireland?" for example, and have a database of questions which will be randomly asked?


You'd have to keep updating your database all the time and should the system ever become popular it will soon be quickly mined and the questions pre-programmed in.

Also, a lot of captchas are now broken by humans, not machines. Though not humans that are willing helpers, humans that are tricked into it. It's now common practice for spammers to set up a fake porn site with a captcha only it's not really a captcha. The spam bot gets the captcha from another site, presents it to the user on the porn site, and then sends that user's answer to the original site they are trying to get into. That technique makes it all but impossible to completely keep spammers out without manual verification.

Bart.

My Home Page - www.bartbusschots.ie

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16 years 8 months ago #53193 by michaeloconnell
Replied by michaeloconnell on topic Re: Memberlist Spam help
OK, you lost me on that one Bart!
But, I'll take your word on it and assume it won't work.
:)

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16 years 8 months ago #53195 by voyager
Replied by voyager on topic Re: Memberlist Spam help

OK, you lost me on that one Bart!
But, I'll take your word on it and assume it won't work.
:)


simply put, spammers trick real human beings into solving captachas for them with the promise of porn/gambling/warez etc.. When it's humans doing the work then you are lost because there is no way to tell the difference between a human and a human :)

Bart.

My Home Page - www.bartbusschots.ie

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