CCNA Wireless 640-722 Official Cert Guide

Message Privacy

Suppose that the client in Figure 14-3 must authenticate before joining the wireless network. It might also authenticate the AP and its management frames. The client’s relationship with the AP might become much more trusted, but data passing to and from the client is still available to eavesdroppers on the same channel.

To protect data privacy on a wireless network, the data should be encrypted for its journey through free space. This is accomplished by encrypting the data payload in each wireless frame just prior to being transmitted, then decrypting it as it is received. The idea is to use an encryption method that the transmitter and receiver share, so the data can be encrypted and decrypted successfully.

In wireless networks, ...