SMS (Text Message) CAPTCHA
The SMS CAPTCHA system requires the user to send a text message to our system then enter the value sent back to them into a web form. No weird obscure letters or questions. The following is an example of the type of values users will be exptected to enter: 21CGYR1L
Give it a try. You you know you want to. :)
If you are looking to adopt this system for your site, here's the skinny on how to get it integrated:
Want Code?
We have full blown working demos along with source code (PHP, PERL, C#) for integrating this stuff into your site! Grab 'em over in our Community page. If you have any other question feel free to contact us.
The SMS CAPTCHA system requires the user to send a text message to our system then enter the value sent back to them into a web form. No weird obscure letters or questions. The following is an example of the type of values users will be exptected to enter: 21CGYR1L
Give it a try. You you know you want to. :)
If you are looking to adopt this system for your site, here's the skinny on how to get it integrated:
- You need an existing web form that exposes functionality you want protected -- say a login form.
- You need to generate a random value that is 32 alphanumerical characters long.
- Embed the random value into your existing form as a hidden element.
- Acquire the initial code from our systems by making a call to 'http(s)://areyouahuman.org/captcha.pl?id=[random value from #2]&type=SMS2'.
- Add the following text to your login form: Text 'VERIFY [value obtained in #4] to 41411'.
- After the user sends the VERIFY message, they will receive a text message containing a code. The user will need a place to enter this value, so you should add a text input to your form as well.
- After the form is submitted you need to parse out the hidden random value and the code entered by the user.
- Make a request to http:(s)//areyouahuman.org/captcha.pl?id=[random value from #2]&code=[value entered by user]&type=SMS2.
- The response to this request will be either 'success' or 'incorrect'. Deny or grant the user's action accordingly.
Want Code?
We have full blown working demos along with source code (PHP, PERL, C#) for integrating this stuff into your site! Grab 'em over in our Community page. If you have any other question feel free to contact us.