About Sharekey and open System+wep

Source: Internet
Author: User

The difference between open_system+WEP and Open_system is that:

For open system authentication, when WEP is enabled at setup time, WEP is used to encrypt data while it is being transmitted, with no effect on authentication.


Beacon Package:


Shared Key +WEP

For shared key authentication, WEP,WEP must be enabled not only for authentication, but also for encryption when data is transferred.

WEP uses a symmetric encryption algorithm (that is, the sender and receiver's keys are consistent), and WEP encrypts the data using either 40-bit or 104-bit and 24-bit initialization vectors (initialization vector–iv, random numbers).

When configuring the security of a wireless network, the 40-bit/104-bit key is typically written as a key length of 64 bits (40+24)/128 bits (104+24).

In the share key +WEP encryption mode will be more than two auth messages, mainly auth interactive process involved in the challenge package.

In addition to releasing the authentication mechanism for shared key authentication, the shared key authentication requires that the STA and AP Configure the same shared key, and the shared key authentication process is as follows:

    1. STA sends authentication request to AP first;
    2. The AP randomly generates a challenge packet (that is, a string) sent to the STA;
    3. The STA will copy the received string into the new message, encrypt it with the key and then send it to the AP;
    4. After the AP receives the message, it decrypts the message with the key, and then compares the decrypted string with the string that was most initially given to the STA. If the same, the STA has the same shared key as the wireless device side, that is, shared key authentication, otherwise the shared key authentication fails.

Packet Capture Analysis Beacon:

Station--->ap (auth1)

AP---->station (auth2)

Station--->ap (AUTH3)

AP--->station (auth4)

How to check the key we set through the console right?


hex:1111111111--->10 1. Represents 5 bytes

Interface schematic:

Assic:12345-->5 digits, representing 5 bytes, 12345à31 32 33 34 35

Interface schematic:

About Sharekey and open System+wep

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