Old Captcha vs New Captcha

CAPTCHAs(Completely  Automated Public Turing  test to tell Computers and Humans Apart ) are in use for many years to prevent  automated  Sign-ups into email accounts and  websites requiring signups or like.Here the users have to identify the scrambled/distorted letters or words in an image and type it down in the space provided,it is generally used to differentiate between automated machines  and human attempts to Sign-up.

What is the need for  CAPTCHA?

Well,as mentioned above the function is to "differentiate between automated machines  and human attempts to Sign-up" so it is quite evident why we need it? 

1. Few unpopular companies can use automated systems to Sign-up in email accounts and increase the popularity of their product but due to captcha it is prevented to some extent.

2.At the same time attackers can use automated machines to  increase huge amount of load on the target sever so,capthca's presence abandon this to some extent.

3.Captcha also prevents  Sign-ups of loads of  spam accounts per day which result in rejection of  registration.
 
What is  New Captcha? 

Canadian firm Nucaptcha  aims to rewrite the rules for account validation with  video based captcha system.Users have  to identify moving text on a video background. The firm also offers a voiceover audio option for the partially sighted or colour-blind.

What is the need for New Captcha?

1. This  can be used with ease compared to  traditional text-based CAPTCHAs.which have a 25 per cent registration rejection rate due to wrong typing and user frustration on visualizing.

2.This platform of captcha behavioral  intelligence to deliver easy captcha to normal users and difficult captcha to attackers.

3.Animated captcha are very difficult for automated software to  solve as they have closely packing letters together.

READ THIS REPORT: This is a research  report(Download)
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comment 3 comments:

Shabnam Sultan on July 2, 2010 at 4:47 PM said...

I hate captchas in blogs :(

Satyajit Das(Author) on July 2, 2010 at 11:37 PM said...

Yes captchas can be sometimes irritating in the comment part of the blog......it may turn down comments to some extent.......
keep visitng... :)

Shekhar Sahu on September 15, 2010 at 4:17 PM said...

Oh new captcha after google s recaptcha. Lets see if its accepted, because this will require more bandwidth.

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