Netgear WGM124 User Manual download pdf (Page 86)

NETGEAR Wireless Router Setup Manual

D-6 Wireless Networking Basics

December 2004

WEP Shared Key Authentication

This process is illustrated in below.

Figure D-2: 802.11 shared key authentication

The following steps occur when two devices use Shared Key Authentication:

1. The station sends an authentication request to the access point.

2. The access point sends challenge text to the station.

3. The station uses its configured 64-bit or 128-bit default key to encrypt the challenge text, and

sends the encrypted text to the access point.

4. The access point decrypts the encrypted text using its configured WEP Key that corresponds

to the station’s default key. The access point compares the decrypted text with the original

challenge text. If the decrypted text matches the original challenge text, then the access point

and the station share the same WEP Key and the access point authenticates the station.

5. The station connects to the network.

If the decrypted text does not match the original challenge text (i.e., the access point and station do

not share the same WEP Key), then the access point will refuse to authenticate the station and the

station will be unable to communicate with either the 802.11 network or Ethernet network.

INTERNET LOCAL

ACT

12345678

LNK

LNK/ACT

100

Cable/DSL

ProSafeWirelessVPN SecurityFirewall

MODEL

FVM318

PWR TEST

WLAN

Enable

Access Point1) Authentication

request sent to AP

2) AP sends challenge text

3) Client encrypts

challenge text and

sends it back to AP

4) AP decrypts, and if correct,

authenticates client

5) Client connects to network

802.11b Authentication

Shared Key Steps

Cable or

DLS modem

Client

attempting

to connect

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Netgear WGM124 User Manual Page 86

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