On Mon, Apr 25, 2011 at 4:13 PM, Richard Kaye <rk...@artfact.com> wrote:

> The SSID is like a user name and the key is the password.

I think even that metaphor gives SSID's too large a role in security.
You don't walk around with your username on your nametag (well, at
least I don't) so it's somewhat of a "secret" even though it's a weak
one, RKaye.

The SSID is easily readable in cleartext by any packet sniffer whether
you are broadcasting it or not. The only thing disabling the SSID
broadcast does is remove the SSID name from the GUI of a user trying
to log in. These folks can be stumped by a six-letter password
consisting of your dog's name. These aren't the people you need to be
worried about.


To quote Wikipedia,

"Unfortunately, turning off the broadcast of the SSID may lead to a
false sense of security. The method discourages only casual wireless
snooping, but does not stop a person trying to attack the network.[2]"

"It is not secure against determined crackers, because every time
someone connects to the network, the SSID is transmitted in cleartext
even if the wireless connection is otherwise encrypted. An
eavesdropper can passively sniff the wireless traffic on that network
undetected (with software like Kismet), and wait for someone to
connect, revealing the SSID. Alternatively, there are faster (albeit
detectable) methods where a cracker spoofs a "disassociate frame" as
if it came from the wireless bridge, and sends it to one of the
clients connected; the client immediately re-connects, revealing the
SSID.[3]

"As disabling SSID does not offer protection against determined
crackers, proven security methods should be used such as requiring
802.11i/WPA2.[4]"

http://en.wikipedia.org/wiki/Service_set_%28802.11_network%29

-- 
(Not picking on you, Richard, just replying to the end of the thread. No harm.)

Ted Roche
Ted Roche & Associates, LLC
http://www.tedroche.com

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