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From: Peter <occassionally-confused@nospam.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: Chinese downloads overloading my website
Date: Thu, 14 Mar 2024 16:26:40 +0000
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 Don Y <blockedofcourse@foo.invalid> wrote:

>(Without having seen them...)  Can you create a PNG of a group
>of them arranged in a matrix.  Then, a map that allows clicking
>on any *part* of the composite image to provide a more detailed
>"popup" to inspect?
>
>I.e., each individual image is a trip back to the server to
>fetch that image.  A single composite could reduce that to
>one fetch with other actions conditional on whether or not
>the user wants "more/finer detail"

All of this "graphical captcha" stuff is easy to hack if somebody is
out to trash *your* site.

For example I run some sites and paid someone 1k or so to develop a
graphical captcha. It displayed two numbers as graphic images and you
had to enter their product e.g. 12 x 3 = 36.

A friend who is an expert at unix spent just a few mins on a script
which used standard unix utilities to do OCR on the page, and you can
guess the rest.