Describe in detail the following diagram of the key hierarchies used in TKIP protocol. Detail every use and function of each generated key. (e.g PMK, Key Integrity Key, GMK..etc)

Key hierarchies random generation n AP 802.1X authenticatio PMK (pairwise master key) GMK (group master key) key derivation in STA and AP key derivation In AP PTK (pairwise transient keys) GTK (group transient keys): key encryption key key integrity key data encryption key data integrity key group encryption key group integrity key transpor't to every STA (128 bits each) unicast message trans between STA and AP broadcast messages trans from AP to STAs Key hierarchies random generation n AP 802.1X authenticatio PMK (pairwise master key) GMK (group master key) key derivation in STA and AP key derivation In AP PTK (pairwise transient keys) GTK (group transient keys): key encryption key key integrity key data encryption key data integrity key group encryption key group integrity key transpor't to every STA (128 bits each) unicast message trans between STA and AP broadcast messages trans from AP to STAs