Darxus (darxus) wrote in suggestions,
Darxus
darxus
suggestions

Only allow captcha solutions from IP which the captcha was given to

Title
Only allow captcha solutions from IP which the captcha was given to

Short, concise description of the idea
Only allow captcha solutions from the IP which the captcha was given to

Full description of the idea
If you're not aware, there are a number of sites that will get humans to solve captchas for you for $2 per 1,000. I suspect the way lj is using recaptcha.net allows these people to sell pre-solved captchas to anyone wishing to spam any site using recaptcha.net. (I know they sell pre-solved captchas for myspace, for example.)

This problem can be reduced by only allowing captcha solutions from the IP the captcha was originally given to.

If the image of the captcha was downloaded from one IP, don't allow another IP to use it for verification just because they have solved it correctly.

An ordered list of benefits
  • Less spam.
An ordered list of problems/issues involved
  • A little more load on lj servers?
Tags: abuse, captchas, spam, § no status
Subscribe
  • Post a new comment

    Error

    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

  • 7 comments