Marcus Börger wrote:
> I do not think having your cookie beeing part of dns is 
> a fast solution or did you your self register many of 
> these entrie before you brought
> your page up because than i get me a dns server download your
> possible cookielist (then it is a download :-) ) and and do a
> little easy
> hacking.

i think you are missing here the possibility of wildcard A
records such as

*       IN      A       86400   w.x.y.z

Such a record in your zone will match each and any host. See
http://gugelhupfdiwupf.lernnetz.de for an application that
utilizes this. Wildcard-A's are especially useful in conjunction
with mod_vhost, if your are not using them for session ids.

Also, there is no such list to download. There is just the
above line in your zone.

> And of cause you do not use IP adresses if so you could not
> distinguish
> between usesers sitting behind a firewall in an intranet.
> Cookie - yes you need not with that solution.

If I am informed correctly, one of the claim in the SevenVal 
Patent essentially covers Wildcard-A's. Technically, this
cannot be granted, as Google easily finds prior application
of Wildcard-A's that dates back to the late 80ies. Yet, it is
still an unchallenged claim and therefore a reaily before the
law. The essential "new" idea that SevenVal wants to protect
is the combination of two standard ideas of Wildcard-A's and
secure md5 session ids, thus the patent - reality of patent
law today.

Kristian

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