Re: MD5 & bot Question

At 10:46 PM +0100 4/9/07, Tijnema ! wrote:

On 4/9/07, tedd <tedd@sperling.com> wrote:

It doesn't need to be complicated, just random placed pixels on the image from a selection of colors would provide millions of permutations. Cheers, tedd

But then OCR would still work, as when somebody scans a document, there are also some "not white" pixels. Tijnema

Tijnema: An OCR is an Optical Character Reader -- it's design is to recognize characters (A-Z 0-9), not images. That's the reason why I previously used the term "OCR-like" application -- meaning that it would be designed/programmed to "see" the differences between images and then make a decision as to what to do. That requires more effort than an OCR program. Add to that, that every image could present a new problem to decipher and you have the makings of a formidable deterrent. That's what asirra is all about, see: http://www.asirra.com/examples/ExampleService.html With millions of different images and more being added, it presents a considerable challenge to crack. Cheers, tedd -- ------- http://sperling.com http://ancientstones.com http://earthstones.com