CAPTCHA is a verification system from Google, to distinguish users between humans and robots.
When you access a site, we often have to fill in a CAPTCHA or verification system, a combination of letters and numbers.
The CAPTCHA display will continue to repeat until one can answer exactly which letters and digits codes are presented.
The CAPTCHA is a test or acronym that stands for Completely Automated Public Turing test to tell Computers and Humans Apart or automatic public Turing test, to distinguish computers and humans.
Now, Google has changed the old CAPTCHA version, and replaced it with a version that can work quietly. These technologies will be applied to a new service called reCAPTCHA or “Invisible reCAPTCHA.”
Just like its initial function, reCAPTCHA is a free service from Google that helps protect websites from spam and abuse. It’s easy for humans to finish it, but it’s hard to “bot ” and other malicious software to find out. It is one of the tools used Running Room to ensure safety and security.
When you select “I am Not Robot ” Or I am not a Robot, you will be asked to select a similar element before going to the site.
CAPTCHA or some netizens in Indonesia call it Capcay because it is difficult to recite, is a protector for a website from Bot or Botnet attacks and SPAM.
The use of a CAPTCHA is done to secure resources owned by a website. Heavy access is not a human Bot alias to a website, will destroy the website.
In technical language, this action is referred to as Distributed Denial of Service. In addition, especially for websites that have similar comments or columns, the use of CAPTCHA is done to avoid the comments feature or a similar column filled by an automatic machine.
In the Internet world, the largest CAPTCHA service provider is Google’s reCAPTCHA.
reCAPTCHA was developed by a team led by Luis von Ahn of Carnegie Mellon University. Then, in 2009 Google took over reCAPTCHA ownership.
Luis von Ahn, as told The New York Times, revealed that he had estimated reCAPTCHA to have been used 70 percent to 90 percent of the site using CAPTCHAS.
Quoted from Techopedia, bots can be used for productive tasks, but bots are also often used for ungood purposes. One good example of a bot is the search engine spiders.
Such bots trap the WEB and index new pages for search engines. Other examples include the Internet Relay Chat (IRC) bot which had been popular many years ago because it could be a group communication place and also private communication.
In addition, the other bot is chatter bots, a computer program designed to simulate conversations with one or several humans that can be done with audio or text, usually this is done for online help, personal services and others. But there are also bots that have an unkind and dangerous purpose.
Usually comes as part of a virus or worm, there are also bots that are used in user identity theft or to attack a variety of interconnected computers.
This is very prevalent happening in the botnets, i.e. the collection of infected computers that bots are not good or evil are usually bots coming from a master computer or computer that becomes the center of other computers.
Technically, at the start of reCAPTCHA occurrences, they use words and numbers to guess by internet users. ReCAPTCHA-displayed words originate from Google’s Digital book projects.
When Google performs a book digitisation project, sometimes there are words or sentences that the machine cannot read or detect. Words or sentences that cannot be read or detected have some reason.
The presence of “Invisible reCAPTCHA” will increasingly make convenient internet users around the world. Citing the initial reCAPTCHA slogan, let us the Internet users to “stop spam, read books.”