Finding encryption information.
The data sheets for the Cisco Aironet Wireless 340 Series and 350 Series products provide information on supported encryption key lengths.
The specific model numbers for products also give Wired Equivalent Privacy (WEP) capability information.
Note: As on date WiFi certifies 64 bit WEP encryption. So interoperability between devices from different vendors implementing 64 bit is ensured . But the same is not true for 128 bit.
Refer Wireless LAN Security White Paper for more information on security
Release notes / product overview / data sheet / FAQ