Netgear CG814WB 사용자 설명서

Networks, Routing, and Firewall Basics

B-15

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 802.11b network or Ethernet network.

This process is illustrated in below.

IN TER N ET

LO CA L

Cable/DSL

ProSafeWirelessVPN Security Firewall

MODEL

FVM318

PWR

TEST

W LA N

Access Point

1) 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

Cable or

DLS modem

Client
attempting
to connect