  We propose a model of operation for next generation wireless Internet, in
which a mobile host has hundreds of "disposable" Mobile IPv6 home addresses.
Each correspondent is distributed a different disposable home address. If
attacked on a given home address, the mobile user can block packets to that
address and become unreachable to the attacker. Blocking one address does not
affect other addresses. Other correspondents can still reach the mobile host. A
new home address can also be requested via e-mail, instant messaging, or
directly from the target host using a protocol that we develop. This model is
especially useful against battery exhausting Denial-of-Service (DoS) attacks
and CPU exhausting distributed DoS attacks, since it seems to be the only
viable solution, currently. We show however that this model can also be used to
defeat other attacks and also to stop spam.
