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Is CAPTCHA Essential?
CAPTCHA, the short form of Completely Automated Public Turing test to tell Computers and Humans Apart is essentially a sort of test that recognizes whether the user is a computer or a human being. It comes under the trademark of Carnegie Mellon University. For more information, you can go to http://www.protectwebform.com/.
CAPTCHA, the short form of Completely Automated Public Turing test to tell Computers and Humans Apart is essentially a sort of test that recognizes whether the user is a computer or a human being. It comes under the trademark of Carnegie Mellon University. For more information, you can go to http://www.protectwebform.com/.
After a CAPTCHA is installed, when there is an attempted access to the system there is a test given to determine if it is a human or a computer attempting access. Generally, CAPTCHA uses a picture of some distorted letters or numbers and asks for them to be retyped. A person can understand what the distorted letters are supposed to look like, while a computer cannot. Therefore, if the right answer is given, the test determines they are human. It’s very easy to use and you can learn more about it at http://www.protectwebform.com/smartcaptcha.
Most website owners opt for a function wherein the visitors can send in their feedback without allowing spammers to barge in. The moment you post your email id on the net, you can rest assured of the attack from the spammers. Automated programs that are better known as bots have the ability to scan your website and parse out your mail id. The spammers use the email ids for many purposes without your knowledge or permission.
Another option is CAPTCHA that does not allow the spammers to get access to your email ids. Many websites and sign-up pages use CAPTHCA. It assumes that computer programs cannot read distorted characters. It is considered fairly reliable.
As a fully automated program, CAPTCHA is so advanced it creates tests that can only be completed properly by humans. And since it runs itself, you don’t have to baby-sit the system for it to work. This is why so many webmasters use CAPTCHA to keep their sites safe and secure.
CAPTCHAs prevent abuse of a system. Once spammers get access to your mail id, then you are trapped. You will be bombarded with spam mails and you can never be sure what your id will be used for.
Many email services and online blogs are the ones who could benefit most from CAPTCHA. If you have webmail accounts through Gmail, Hotmail, or Yahoo, you know how many spam e-mails seem to get into the system. In addition if you regularly read online blogs, you have likely seen some that have had a long string of spam postings. CAPTCHA can stop these posts from happening by catching the spamming programs before they have a chance to do their work.
There have been numerous efforts at creating CAPTCHAs that are handier. Such endeavours usually include the use of JavaScript, mathematical questions (like “what is 1+1“), or simple questions requiring common sense (for instance “what color is the sky“). These attempts infringe on one or both of the philosophy of CAPTCHAs. Either they cannot be automatically created or they can be easily split given the condition of false intelligence. So, the only security these CAPTCHAs provide is safety through obscurity.