Recent content by TomN

That's a really good question. They have a few weaknesses. 1. Math problem can be easily solved by a computer. Go to www.google.com and type 2+2= and you'll see what I mean. If you really want to see something amazing, go to http://www.wolframalpha.com and type in...

Here's a better xkcd, but it contains some bad language: http://imgs.xkcd.com/comics/constructive.png Agreed! It might be as easy as just looking at the Flash file. No OCR required! Now here's a hard CAPTCHA for bots! Vappic 4D CAPTCHAs are meant to exercise your visual cortex...