Im dropping a cookie with userid. Can I encrypt it somehow???

I would like to encypt my cookie. Does anyone have any idea on how to do it.
Thanks in advance

You can do pretty much what you want with it. It is easy enough to create your own simple encryption algorithm for a number like a userid. An alternative is to use a session variable that is matched to the user id on the server side and times out after a short while. That way even if someone does read the cookie from your client machine it is useless to them.

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