CAPTCHA

"CAPTCHA"  EVER HEARD ABOUT THIS

But every person who deals with a computer and works more on internet can frequently find this CAPTCHA in their middle of their work
Thinking what it is ?? 
Don't worry much.I will explain u.

When you are filling details for an website to sign-in or when you are commenting on  a official website articals you will come across with this.

Still confused .
                                           WATCH THIS

CAPTCHA

 Hope you understand what i am talking about.
 

•  Do you know what CAPTCHA is ?
•  Did you know for what reason it is used ?
•  Why this software is implemented in this particular field ?

 Hope you never think of this CAPTCHA ..!
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 Lets get started

 CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart)  some people call this as HIP(Human Interaction Proof)
 
 Its somewhat difficult to understand the zigzag aligned words. we can refresh to get a new set of words in some cases where we cannot understand the words we can listen by pressing sound key. We cannot go further without entering the words in the given space
 What is the purpose behind the "captcha" why this much of importance is giving to it

• To differentiate between the computers and human there is an automated turning test is conducted and this is know as CAPTCHA 

Some of you can ask a question that what will happen if computer didn't differentiate them ?
even i arise the same doubt when i am trying to know the use of captcha

• There are many programmers who can write a code and give to computer so that it can perform itself the given commands until the user defined it to stop without the help of the human.
• If a programmer write a code of creating a Gmail account and gives to a manual it creates a Gmail account with in 30 seconds
• If he did same thing for infinite times it conducts actions repeatedly and create more and more accounts and within one day the Gmail database is going to get crash
• This type of things cannot be done by every person but only by experts. one hacker is enough to crash entire website

Hence captcha is used.

In this the words are damn curved and in a random way. where a computer cannot understand and it is designed as if only human can understand

If captcha is given in a text format again their a chance for the hackers to develop the code of copy&paste. Hence it is given in a image format

captch technology is running on the base of reCAPTCHA program
This reCAPTCHA  program is totally done by humans hence some people are recurited for this job