Captcha Definition
Captcha is the abbreviation of “Completely Automated Public Turning test to tell Computers and Humans Apart”.
What is Captcha?
Captcha is some kind of a test or a task that human user will perform easily while a bot or an automated script should find it difficult to carry out as well as time-consuming.
Captcha tests are used in situations in which websites owners need to be sure that the user is not a bot and as such doesn’t intend to misuse their online platforms and/or the free services they offer (such as free blog and forum registration or free e-mail accounts).
By using Captcha program the server prevents e-mail spamming, commercial promotion in forums, vandalism and so on.
Captcha System
The Captcha system is based upon visual perception, analogical human intelligence or sensual skills.
The most common Captcha control contains an image of distorted letters or numbers and other signs that the user need to copy. Sometimes a serial of images appear of which a single subject should be defined, sometimes a question to be solved appears, all to ensure security and protection from automated abuse.
July 25th, 2009 at 10:52 am
[...] Captcha is a test that comes to validate web users as humans (=rather than computer bots). the captcha test can be used for site registration, for example – just before registration is completed the user is asked to copy an image with distorted letters. Since those letters are captured in images and are displayed randomly, and bots can not “read” images, the CAPTCHA test suppose to “stop bots from passing the test and using the web for their inetrests”. [...]
September 6th, 2009 at 8:43 pm
[...] is captcha for? Captcha system is used on the online sphere as a method of verifying a user as a human being. Since some websites [...]
December 19th, 2009 at 10:33 am
[...] the connection between good and evil to Captcha? Well, Captcha belongs to the “good guys”. It is based on the idea of assisting websites to filter [...]