Re: Re: I-worm/Klez and a GIF query/question

On Saturday 04 May 2002 04:58, Hugh Bothwell wrote: > "R" <r@jumac.com> wrote in message > news:007501c1f304$3c1607a0$0a6da8c0@lgwezec83s94bn... > > > at the end of the form he wants a "key" gif...(A gif with a number) > > that is automatically generated and that number has to be entered into > > the text box....the idea is that it prevents automaited > > registerations..... > > I've seen code that puts out an image that is .gif-compatible > (ie can be viewed in any browser) but is not LZH-compressed, > ie does not fall under the patents. I could write a PHP file > to do it... > > The drawback, of course, is no compression; but for a small > image that shouldn't be a problem. > > NOTE that for someone sufficiently persistent, they could still > pattern-match the generated image to retrieve the number and > auto-register that way. (I could write a PHP file to do that, too :-) The pics generated by services like Yahoo are distorted and thus are extremely difficult to OCR. -- Jason Wong -> Gremlins Associates -> www.gremlins.com.hk Open Source Software Systems Integrators * Web Design & Hosting * Internet & Intranet Applications Development * /* It is Mr. Mellon's credo that $200,000,000 can do no wrong. Our offense consists in doubting it. -- Justice Robert H. Jackson */