Data Encryption; Authentication; Figure 6-2 Wep Authentication Steps - ZyXEL Communications ZyAir Access Point Series User Manual

ZyAIR Access Point Series User's Guide

6.2.1 Data Encryption

WEP provides a mechanism for encrypting data using encryption keys. Both the AP and the wireless stations
must use the same WEP key to encrypt and decrypt data. Your ZyAIR allows you to configure up to four 64-
bit or 128-bit WEP keys, but only one key can be enabled at any one time.

6.2.2 Authentication

Three different methods can be used to authenticate wireless stations to the network: Open System, Shared
Key, and Auto. The following figure illustrates the steps involved.

Figure 6-2 WEP Authentication Steps

Open system authentication involves an unencrypted two-message procedure. A wireless station sends an
open system authentication request to the AP, which will then automatically accept and connect the wireless
station to the network. In effect, open system is not authentication at all as any station can gain access to the
network.
Shared key authentication involves a four-message procedure. A wireless station sends a shared key
authentication request to the AP, which will then reply with a challenge text message. The wireless station
6-2 Wireless Security