Installation guide

Chapter 10
134 Sniffer Technologies
Postcapture WEP Decryption
The Sniffer software can decrypt and decode WEP-encrypted packets either
during or after capture. As described in Setting Encryption Options on page 85,
you use the Encryption options in the 802.11 tab of the Options dialog box to
configure the automatic decryption of WEP-encrypted data during capture.
However, you can also perform WEP decryption on trace files containing
frames encrypted with a known WEP key set but not decrypted during capture.
This section describes how.
To perform offline decryption of WEP-encrypted data:
1 Display the Decode tab of a trace file or capture buffer containing
frames encrypted with a known WEP key set but not decrypted during
capture.
Figure 10-13 shows the Decode tab of a saved trace file from a wireless
LAN.
Figure 10-13. Decode Tab of a Saved Trace File from a Wireless LAN
Decode tab selected.