With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwvlWlanEncryptionMode
cwvl Wlan Encryption Mode
1.3.6.1.4.1.9.9.268.1.2.1.1.4
Encryption mode used on the VLANs are: none (1) - No encryption and use VLan as security mechanism, wep (2) - WEP encryption, aes (3) - Advanced Encryption Standard.
Back to CISCO-WLAN-VLAN-MIB MIB page.
IPHost Network monitor allows you to monitor cwvlWlanEncryptionMode on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.