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I'm sure you know what CAPTCHAs are. They usually are not very welcomed when filling in a form, but the idea behind them is to at least reduce the possibility of automatic non-human procedures submitting the form itself. The main point is to recognise if who or what is submitting a request is really a human or not.
The solution I'm presenting here is very simple and it is not unbreakable. Infact, today we surely need a highly sophisticated CAPTCHA procedure in order to be completely sure of its effectiveness.
On the other hand, we can use the solution here presented whenever we need a little bit more security.
We are going to use ASP and GUIDs (Globally Unique Identifier).
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Web development, web design and programming.