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group transient key (802.11i) (GTK)

The Group Transient Key(GTK) is part of the key management ofWLANs according to 802.11i.

The GTK key is generated by the access point by combining the Group Master Key( GMK) with a random number function(PRF) and distributed to the WLAN stations with the Key Encryption Key( KEK) via a four-way handshake.

Authentication procedure in 802.11i

Authentication procedure in 802.11i

The GTK key is used for secure multicast and broadcast transmission. All WLAN stations connected to the same access point( AP) share this key. In addition, other multicast/broadcast keys are derived from the GTK key.

Englisch: group transient key (802.11i) - GTK
Updated at: 16.05.2014
#Words: 92
Links: key management (KM), group master key (WLAN) (GMK), key encrypting key (KEK), vertical interconnect access (PCB) (via), handshake
Translations: DE

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