We have all seen CAPTCHA’s on the various web sites we visit. Something that never occurred to me though is that it seems that there is a whole industry built around circumventing or cracking CAPTCHA’s. Read the CAPTCHA topic on Wikipedia or do a Google search on ‘CAPTCHA cracking’ and you will find many articles on the topic.
There are various methods that are implemented to automatically crack them that range from using simple OCR software to using neural networks. I have also read some articles that mention that they can be cracked with JavaScript.
