One of the blackhats proposed a clever outside-of-the-box solution:
1. Create a site that promises free ringtones.
2. Once a visitor enters their cell number, forward it to Craigslist, who sends a verification call to that number.
3. Ask them to enter the verification code on your ringtone site.
4. Redirect the verification code to Craigslist, and send your visitor a ringtone.
This is how CAPTCHA's got cracked as well: by embedding them into porn. ("Would you like me to take off my dress? Enter this code") It sounds hard to beat.
Any other outside-of-the-box solutions that you can think of?
I didn't think of that.. pretty creative, and it looks like it would work, although it's kind of sad that this creativity is going towards blackhat practices.
1. Create a site that promises free ringtones.
2. Once a visitor enters their cell number, forward it to Craigslist, who sends a verification call to that number.
3. Ask them to enter the verification code on your ringtone site.
4. Redirect the verification code to Craigslist, and send your visitor a ringtone.
This is how CAPTCHA's got cracked as well: by embedding them into porn. ("Would you like me to take off my dress? Enter this code") It sounds hard to beat.
Any other outside-of-the-box solutions that you can think of?