| The abbreviated word CAPTCHA sounds a bit odd. However, we come across it almost every day. The World Wide Web is a favourable place where users communicate, exchange information, do business in a convenient and inexpensive manner. But at the same time it is especially favoured by spammers, hackers and online fraudsters, with loads of spam and junk mail moving around the global net.
When decoding the term CAPTCHA, you will get 'Completely Automated Public Turing test to tell Computers and Humans Apart'. It emerged in the year of 2000 as an anti-spam module. It is a compulsory test that Internet users have to before posting an electronic mail. There exist various types of a CAPTCHA test. Yet, the universally known one is a mix of figures & letters very often crossed with a line. Characters are not typed straight. Therefore, it takes a user a few seconds to grasp what is typed in a prompt box. Some Internet users may find the CAPTCHA test excessive. Still, it is a vital preventive measure to shield your mail box from spam & junk mail.
Actually it is the computer that creates a test and assesses how successful a user has been in solving it. But the computer is incapable of solving a test itself. So, if you succed, the computer accepts you as human, because bots cannot solve a CAPTCHA test. This is how the computer identifies if users are human or bots.
Spam is known to be attacking the Internet. Surely, there are a lot of anti-spam protection modules which filter mail. Nonetheless, Drupal CAPTCHA is regarded to be much more efficient. Along with the spam protection, the module secures the protection process, too. The Drupal CAPTCHA adds a compulsory test to all forms used by users or guests.
As seen from the above stated, a CAPTCHA is in great demand these days. So, before you pick a CAPTCHA service provider, make sure it will fulfill your demands. There are also free trial versions you may get from potential service providers before you select a suitable one. Some CAPTCHA modules are well-compatible with a number of programing languages. Do also assure that your service provider will guarantee an emergency server in an isolated network to maintain an unstoppable running of the system, if any problems come up. |
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