Selling password keys

[millet]

I posted this in the General forum - perhaps it is the wrong audience. Can you guys help?

 

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I've searched the posts and the Internet. I'm sure that OSC will do this, but I don't know how....

 

I created an ebook with limited functionality.

Then I created 10 unique passwords that give a user full function.

 

So how do I create a secure file, with the passwords in it, that will strip one password out, give it to the customer and decrement the inventory?

 

Thanks, Steve