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Formula for copy protection
Message
From
04/05/2003 16:32:16
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivia
 
General information
Forum:
Visual FoxPro
Category:
Other
Miscellaneous
Thread ID:
00784667
Message ID:
00784720
Views:
29
>I am looking for a formula or function to use in a very simple method of copy protection. I would like a number or a string to be generated from a random number.
>For example, if the program generates a randrom number, say "1", the formula should generate a crypted string or a "crypted" number, based solely on the seed number.
>
>Anyone can suggest anything? Thank you.

You can use the built-in checksum function, for one. That is functions sys(2007). Other options exist as well - some API function were mentioned in past threads.
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
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