Hello all,

Facebook, the popular social networking website, has introduced a new type human verification system - using phone numbers to verify your "humanness" ( ) permanently, rather than using a CAPTCHA every single time.

Earlier, like in most other websites, you needed to enter a CAPTCHA code (an image verification system) for every single "questionable" action you took. This could get to be quite annoying, as a person will have to strain his eyes to read the scrambled text displayed by the image. And it also takes away precious time. Thus, an alternative had to be brought in soon.

Facebook has seemingly pioneered this alternative. They have introduced verification by phone. i.e. Instead of the CAPTCHA, you can confirm your phone number, and get rid of CAPTCHAs on Facebook for ever.

You’ll be asked to enter your mobile number, along with your country code. A message containing a verification code is SMSed to your mobile phone, which has to be entered in Facebook. And voila, bye bye CAPTCHA!

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I don’t know how long this system has been existence, but it sure wasn’t there a couple of weeks back. This is a pretty good alternative to CAPTCHA, but gives rise to questions about privacy.

Also, the question arises - why can’t CAPTCHA be one time? If phone verification can be one time, why not CAPCTHA? The idea behind CAPTCHA at every step is to prevent bots from being unleashed after a human sign up.  Now, with phone verification, a bot creator (Homo sapien sapien) could sign up, verify using his mobile phone, and let loose the bots of hell! Facebook will have to look into this factor.

Anyway, most of the Facebook users will opt for the mobile verification, since it get rids of CAPTCHA permanently, a great relief while posting URLs or adding friends.

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