Hiding the SSID and using MAC address filtering are terrible methods to secure a network (see this link for a good explanation).
Why not use WPA-PSK encryption?
If you can't use WPA-PSK, say because you have older equipment that does not implement the 802.11i standard, then use WEP. While WEP is not all that secure, it is much better than hiding the SSID and MAC address filtering.
Regards / Jim B / Wireless Enthusiasts
( While I'm an embedded wireless systems engineer at work, on this forum I do not represent my former employer, Hewlett-Packard, or my current employer, Microsoft )
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