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Restricted File Sharing - Excel

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Restricted File Sharing - Excel

tdhbroute2
We are developing a data / analytics product. The industry is not ready to pay for a cloud based tool. So we have developed an excel based tool. Given that we are planning to charge a per user annual license fee we need to be able to prevent the excel tool being used on anyone elses computer. We think this is impossible but maybe there is a way using a USB storage disk or perhaps you know of another way that would at least make it troublesome to copy / share etc.

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