The cookie should be set to be good only for that session of the browser. The result is that, even using DHCP, it will work just fine, since when the person disconnects and re-connects from elsewhere, they will have to re-login to the central server. Also, what about the idea of having the central server, which (once it checks the passwd), creates a cookie, does an MD5 hash of the cyphertext cookie, then RSA encrypts the hash with a public key. (then base64 encodes it all as one string and sets the cookie).

After that, subsequent calls tear off the signature field, unencrypt it, then compare the result to their own MD5 hash of the rest of the cookie. Since IP and username, etc. are in the cookie, those items can also be tested, giving the same protection as the other methods.

This method is only really usefull of course in a place with multiple servers, one central passwd server, etc. But it works. We use it.

What does this little button do . .<Click>; "USER HAS SIGNED OFF FOR THE DAY"

In reply to Re: (jptxs) Re: Securing Passwords by tame1
in thread Securing Passwords by Dr. Mu

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