Wireless networks allow clients to sniff other people’s
packets. Outsiders can sniff traffic on corporate networks.
It seems an encrypted channel between the client and access
point solves the problem. Turns out, as described later in the
paper, it does not. We need an encrypted channel between
a client and an authenticated trusted server on a wired net-
work to achieve the same level of privacy that unencrypted
wired networks provide.