You might have often encountered a message saying “Enter the both words below, separated by a space” or “Type the two words present in the box” or many other such messages.
Why are these required??
It’s a program called CAPTCHA, that can generate and grade tests that humans can pass but current computer programs cannot.
CAPTCHA stands for Completely Automated Public Turing Test To Tell Computers and Humans Apart.
Complete details-
http://computer.howstuffworks.com/captcha.htm
2 comments:
really............. the captchas were started after 1999 when some school students created bots for online polls for giving polls for their institution..................
death by captcha
wow!!!
the great blog.thanks for sharing the information about captcha.
keep blogging.
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