WIRELESS SECURITY
Chapter 8
History
• 1971 AlohoNet – Ethernet Protocol
• 1997 1st version of 802.11
• 1999 Wi-Fi Alliance trade association
US Frequency Bands
Band
Frequency range
UHF ISM
902-928 MHz
S-Band
2-4 GHz
S-Band ISM
2.4-2.5 GHz
(The higher than cell phones - frequency allows the signal to carry
more data.).
C-Band
4-8 GHz
C-Band satellite downlink
3.7-4.2 GHz
C-Band Radar (weather) 5.25-5.925 GHz
C-Band ISM
5.725-5.875 GHz
C-Band satellite uplink 5.925-6.425 GHz
X-Band
8-12 GHz
X-Band Radar (police/weather)8.5-10.55 GHz
What do the waves look like?
Wave Video
Wireless Local Area Network (WLAN)
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Connecting two or more systems using wireless
802.11 Standards
WiFi uses radio waves
Wireless cards are cheap
Irda (direct line of sight – not as many security problems)
150 Feet
Access Point/Hot Spots
• An AP (access point also known as a AP) is the wireless
server that connects clients to the internal network. AP’s
typically act as a bridge for the clients.
Wifi
Wififreespot.com
wi-fiplanet.com
Boing.com
Gogoair.com
Antennas
• Antennas come in all
shapes and styles:
– Omni-directional:
• Vertical Whip
• Ceiling mount
– Directional:
• Yagi (“Pringles can”)
• Wall mounted panel
• Parabolic dish
HotSpots – Are they Safe?
Piggybacking on someone’s else
Wireless Internet
• Google the name: David M. Kauchak
Bluetooth
Bluetooth
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proprietary open wireless technology standard for
exchanging data over short distances (using shortwavelength radio transmissions in the ISM band from
2400–2480 MHz) from fixed and mobile devices.
• WiFi – replaces cables for your network vs. Bluetooth –
replaces cables for your devices
Bluetooth
Bluetooth Attacks
• Bluejacking -sends a message to a phone that you don’t
know. Usually harmless.
• Bluesnarking – is unauthorized access of information &
often times retrieves information.
• Blue bugging – similar to bluesnarking but leaves a
backdoor and then the “hacker” can come and use the
phone.
Page 376-377
How to Secure Your Bluetooth
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Always Turn off your Bluetooth.
Make Your Phone Visibility to Hidden.
Set up a code when pairing devices
Set your “Auto Connection without Confirmation” to No
in all paired Devices.
802.11 Security Tools
• http://sectools.org/tag/wireless/
• Airsnort http://freshmeat.net/projects/airsnort/
• Wepcrack http://sourceforge.net/projects/wepcrack
• Netstumbler - http://www.netstumbler.com/
• Kismet - http://www.kismetwireless.net/