... solutions
WEP (Wireless Equivalent Privacy) encryption
unique and common shared secrets
changing the shared secret often, key exchange secured by vendor
specific solution
IPSEC / VPN, encrypting traffic on IP level, the authentication of user
to network and the network to user
MAC address access filtering in WLAN access point (AP)
Vendor specific solutions like Lucent’s ”closed network” setting.
Legislation concerning deliberate interference of telecommunications