1. By Rohit Shaw Page 1
Wi-Fi : "WiFi" is the short form for Wireless Fidelity. It is a high speed internet
and network connection without the use of wires, cables. It means a type of
wireless networking protocol that allows devices to communicate and transfer data
wirelessly without cords or cables.[1] Wi-Fi is technically an industry term that
represents a type of wireless local area network (LAN) protocol based on the
802.11 IEEE network standard. It's the most popular means of communicating data
wirelessly, within a fixed location, today.[2]
A device that can use Wi-Fi (such as a personal computer, video game
console, smartphone, tablet, or digital audio player) can connect to a network
resource such as the Internet via a wireless network access point. Such an access
point has a range of about 20 meters (65 feet) indoors and a greater range
outdoors.[3]
Wi-Fi KEYS : A wireless key is an encryption setting commonly used on
wireless computer networks to increase their security. The two standard types of
wireless keys support WEP and WPA encryption. To use a wireless key on a home
network, administrators first set up an encryption method on the router (either
WEP or WPA) and choose a value for the appropriate key. Then, the administrator
Wi-Fi
Wi-Fi Keys
• WEP
• WPA TUTORIAL CONCLUSION

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sets the same value on each wireless device connecting to the router. Wireless keys
are hexadecimal numbers that vary in length (but are typically between 128 and
256 bits long) depending on the encryption method used.[4]
 WEP : WEP stands for Wired Equivalent Privacy, A WEP key is a security
code used on some Wi-Fi networks. WEP keys allow a group of devices on a
local network (such as a home network) to exchange encoded messages with
each other while hiding the contents of the messages from easy viewing by
outsiders. A WEP key is a sequence of hexadecimal digits. These digits
include the numbers 0-9 and the letters A-F.
The length of a WEP key depends on the type of WEP security
utilized: i) 40-/64bit WEP: 10 digit key
ii) 104-/128bit WEP: 26 digit key
iii) 256bit WEP: 26 digit key[5]
 WPA : WPA was developed by the networking industry in response to the
weaknesses of WEP. WPA provides stronger encryption than WEP through use
of either of two standard technologies: Temporal Key Integrity Protocol
(TKIP) and Advanced Encryption Standard (AES). A variation of WPA
designed for use on home networks is called WPA Pre Shared Key or WPA-
PSK for short. WPA-PSK is a simplified but still powerful form of WPA.[6]
TUTORIAL : In this tutorial here I am going to show you how to crack WEP keys
in Windows platform.
Tools required : 1] CommView for WiFi
2] Aircrack-ng
Now open your CommView for Wifi and go to file option and click on file capture like
shown in figure.1

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Figure.1
After that a new window appears and then click on start scanning.
Figure.2

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After scanning its shows the list of all channels and the wireless networks which is
running on specified channels like shown in figure.3
Figure.3
In above figure.2 I selected a network which is running on channel 6.For details see
in right side of window it shows the network encryption type, SSID, MAC address.
Then click on capture and wait for the packet data you have to create minimum
5000 packets for cracking a WEP key. Numbers of packets are high then it is easy
for you to crack the key. Like shown in figure.4

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Figure.4
When sufficient packets will create the go to file options and click on stop capture.
Figure.5
After the capturing process it creates a log file in log folder you can check your log
folder directory by clicking on log tab. In figure. 6 here it shows the directory of my
log folder which is in my documents/CommView for Wifi/Logs.

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Figure.6
Now go to log folder there you can see a capture file like shown in figure.7
Figure.7
Now just double click on that file and a new window appeared then go to file option
select Export logs then select Wireshark/Tcpdump format and save your file. Here I
save my file name as hack.cap in my desktop shown in figure.8

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Figure.8
Now open your Aircrack GUI and browse for your saved capture file. Shown in
figure.9
Figure.9
After that click on Launch button then a cmd window appears and asking for index
no. of target network here my target network index no. is 1 like shown in figure.10

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Figure.9
After putting your index number then press enter and the cracking process starts
and the key decrypted successfully like shown in figure.11
Figure.10

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CONCLUSIONS : Hence we conclude that WEP key is not secured. If we create a
256 bit key that can also cracked but that is time consuming we have to capture a
higher number of packets and data.
REFERENCES :
1] URL - http://www.squidoo.com/what-is-wifi
2] URL - http://mobileoffice.about.com/od/glossary/g/wi-fi.htm
3] URL - http://en.wikipedia.org/wiki/Wi-Fi
4] URL -http://compnetworking.about.com/od/wirelesssecurity/f/what-is-a-
wireless-key.htm
5] URL - http://compnetworking.about.com/od/wirelessfaqs/f/wep_keys.htm
6] URL - http://compnetworking.about.com/cs/wirelesssecurity/g/bldef_wpa.htm