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Problems with intelligent Spam Bots
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Enter the missing letter in: "Internation?l"
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[quote][b]NeXuS[/b] wrote: Simple text based captchas will be broken in no time, if the guys writing the bots are so minded. That's why image based captchas are so popular these days (and still not totally fool-proof). The idea is to leverage the specific capabilities of the human brain and sensory system to discourage spammers from doing something that would take too much effort with a computer. Audio captchas are also an idea, but the are more clumsy and invasive (at least for non-blind people, since one looks at a web page).[/quote]
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