Question about cookies

Can a cookie be used for verification of system?

[Storyman]

Is it possible to drop a cookie onto a system that is only valid on that system. I'd like to use that cookie as a way to verify the user for an ebook. The idea is if the ebook and cookie are copied onto another system the cookie will not be valid and the ebook will not open.

[hakre]

no.

[jatar_k]

you could add information to the cookie. some kind of hash that included a bunch of info relative to that machine, well maybe things like user agent and ip. That would at least make it harder.

[Storyman]

You never know until you ask. The replies were helpful in redirecting my efforts. Thanks.