Is it possible on ACS 3.2 appliance to generate a dynamic WEB Key? If YES, what is the procedure? If NO, what is needed to generate it to secure my wireless LAN?
ACS doesn't generate the actual WEP key. It is generated by the Wireless AP.
ACS does provide a "session-key" which is used to calculate the WEP key (using attr #25- Class Attribute) and a Session-Timeout (#27) that the AP might use to decide it needs to generate a new WEP key. However, the config of whether to use Static WEP or Dynamic WEP depends on the WAP and the Wireless client.