Kc3

This field contains the Kc key (Ciphering Key) which the client must generate from the 128-bit random number in order to encrypt the payload data.

SNMP ID:
2.25.10.10.18.1.15 
Telnet path:
Setup > RADIUS > Server > EAP > EAP-SIM > Card-Keys
Possible values:

Max. 16 characters from 0123456789abcdef

Default:
0000000000000000