Setup WEP (Wired Equivalent Privacy)
The 802.11 standard describes the communication that occurs in wireless LANs.
The Wired Equivalent Privacy (WEP) algorithm is used to protect wireless communication from eavesdropping, because wireless transmissions are easier to intercept than transmissions over wired networks, and wireless is a shared medium, everything that is transmitted or received over a wireless network can be intercepted.
WEP relies on a secret key that is shared between a mobile station (e.g. a laptop with a wireless Ethernet card) and an access point (i.e. a base station). The secret key is used to encrypt packets before they are transmitted, and an integrity check is used to ensure that packages are not modified during the transition. The standard does not discuss how the shared key is established. In practice, most installations use a single key that is shared between all mobile stations and access points APs.
WEP employs the key encryption algorithm, Ron's Code 4 Pseudo Random Number Generator (RC4 PRNG). The same key is used to encrypt and decrypt the data.
WEP has defenses against this attack. To avoid encrypting two cipher texts with
the same key stream, an Initialisation Vector (IV) is used to augment the
shared WEP key (secret key) and produce a different RC4 key for each packet, the IV is also included in the package. WEP key (secret key) are available in two types, 64-b
Most access points and clients have the ability to hold up to 4 WEP keys simultaneously. You need to specify one of the 4 keys as default Key for data encryption. To set up the Access Point, you will need to set the one of the following parameters:
You can set up the Access Point by SMT or Web configurator
ZyXEL G-1000 V2 holds up to 4 WEP Keys. You have to specify one of the 4 keys as default Key which be used to encrypt wireless data transmission.
For example,
Key settings
WEP Key type |
Example |
64-bit WEP with 5 characters |
Key1= 2e3f4 |
64-bit WEP with 10 hexadecimal dig |
Key1= 123456789A |
128-bit WEP with 13 characters |
Key1= 2e3f4w345ytre |
128-bit WEP with 26 hexadecimal dig |
Key1= 112233445566778899AABBCDEF |
Select one of the WEP key as default
Key to encrypt wireless data transmission.
The receiver will use the corresponding key to decrypt the data.
For example, if access point use Key 3 to encrypt
data, then station will use Key 3 to decrypt data.
So, the Key 3 of station has to equal to the Key 3 of access point.
Though access point use Key 3 as default key, but the station can use the other
Key as
Access Point (encrypt data by Key 3) --------> Station (decrypt data by Key 3)
Access Point (decrypt data by Key 2) <-------- Station (encrypt data by Key 2)
In this case, access point transm
At the same time, when the station transm
The access point will decrypt the data by
1. Double click on the utility icon in your windows
task bar or right click the utility icon then select 'Show Config
Utility'.
The utility will pop up on your windows screen.
Note: If the utility icon doesn't exist in your task bar, click Start -> Programs -> IEEE802.11b WLAN Card -> IEEE802.11b WLAN Card.
2. Select the 'Encryption' tab.
Select encryption type correspond with access point.
Set up 4 Keys which correspond with the WEP Keys of access
point.
And select on WEP key as default key
to encrypt wireless data transmission.
Key
settings
The WEP Encryption type of station has to equal to the access point.
Check 'ASCII' field for characters WEP key or uncheck 'ASCII' field for Hexadecimal dig
Hexadecimal dig
For example,
64-b
Key1= 2e3f4
Key2= 5y7js
Key3= 24fg7
Key4= 98jui
64-b
Key1= 123456789A
Key2= 23456789AB
Key3= 3456789ABC
Key4= 456789ABCD
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