With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfVlanEncryptKeyEntry
Cisco DOT11 Interfaces Vlan Encrypt Key Entry
1.3.6.1.4.1.9.9.272.1.1.1.9.1
Each entry contains the key index, key length, and key value. There is a maximum of 4 keys per VLAN or key set. Each key set exists only if the corresponding VLAN is enabled on the interface, and it is indexed by the VLAN ID.
Back to CISCO-DOT11-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cd11IfVlanEncryptKeyEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.