What i would like to do is encode a file

then say Sam,Bob can decode it but lets
say sam gives hes decoder to Jon

so now jon can decode it as well

I want to have it so that only the person i want can decode what was sent even if was shared it would require thier system to open it

But I didnt want jon to be able to open it ?
see my idea

or say have a code that can be added to the file so that say a web spider can track it

Is there such a beast out there ?
or anyone have any ideas

I could use anything from 0-$ ideas

thanks

I think PGP can do what you are asking (I emphasise: I think - I haven't tried it for this).

Take a look at the FAQs:

http://www.pgpi.org/doc/faq/pgpi/en/#What

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Sualdam

from what i read it is not:

I just need a way to secure
so that either the file can only be open by the other system i approved
or
that say a member logs in they can only login from there pc and no1 eles

What you need to do is program the software to validate to your server and then create a computer id which the software or program looks for. You can then have the software register the CID with your database. So, if anyone else attempts to decode the information they will not be able to do that.

It's the same technique software developers are using these days to cease piracy issues.

I hope this helps.

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Lee Roberts