Woohooo.
I was always disturbed when while posting to a Forum or to Digg , I got the error saying something like CAPTCHA. It always appeared to me like it way saying "Caught You" doing something wrong. OK !! Imight have entered wrong letter, probably wrong case ( lowercase or uppercase), but for that the CAPTCHA error was really annoying.
Now that there are reports that CAPTCHA is broken, I got to know its real meaning.
CAPTCHA, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart, is a technique adopted by Yahoo, Google, and Microsoft (News - Alert) among other service providers to prevent automated software programs from posing as humans and signing up for new accounts.It presents text that is easy for humans to comprehend but difficult for automated programs and as a result protects Web sites from bots. The first CAPTCHA was invented at the Carnegie Mellon University to be used by Yahoo. CAPTCHAs have other applications like preserving the authenticity in online polls, preventing comment spam in blogs and preventing dictionary attacks in password systems among others.
The article further says that a broken CAPTCHA could result in more spam mails and probably more phishing attacks.
Please beware.
The news about more spam and phishing worries me too, but I am happy at least I got to know the meaning of CAPTCHA.
I was always disturbed when while posting to a Forum or to Digg , I got the error saying something like CAPTCHA. It always appeared to me like it way saying "Caught You" doing something wrong. OK !! Imight have entered wrong letter, probably wrong case ( lowercase or uppercase), but for that the CAPTCHA error was really annoying.
Now that there are reports that CAPTCHA is broken, I got to know its real meaning.
CAPTCHA, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart, is a technique adopted by Yahoo, Google, and Microsoft (News - Alert) among other service providers to prevent automated software programs from posing as humans and signing up for new accounts.It presents text that is easy for humans to comprehend but difficult for automated programs and as a result protects Web sites from bots. The first CAPTCHA was invented at the Carnegie Mellon University to be used by Yahoo. CAPTCHAs have other applications like preserving the authenticity in online polls, preventing comment spam in blogs and preventing dictionary attacks in password systems among others.
The article further says that a broken CAPTCHA could result in more spam mails and probably more phishing attacks.
Please beware.
The news about more spam and phishing worries me too, but I am happy at least I got to know the meaning of CAPTCHA.
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