Key ACK (bit 7) - message from authenticator
Error flag (bit 10) - error occurred
Install flag (bit 6) - indicates key should be installed
Key MIC (bit 8) - MIC field is valid
Encrypted Key Data (bit 12) - key data is encrypted
Key Type (bit 3) - true=pairwise, false=group
Request flag (bit 11) - supplicant requests new key
Secure flag (bit 9) - secure association established
SMK Message (bit 13) - TDLS station-to-station key
Key Descriptor Version (bits 0-2) - crypto algorithm
Key Information field (2 bytes) from EAPOL Key Frame Bit flags indicating key properties and frame purpose