FT Introduction
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1.Introduction
establishes the state necessary for data connectivity before the reassociation rather than after the re-association .
2. method:
FT-Over-air: interact with the target ap directly.
FT-Over-DS: interact with the target ap througt the ds.
3.Protocol
FT protocol
FT Resource request protocol
FT 4-way handshake
4.FT hierarchy key architecture
Third level
R0KH->R1KH->Ptk Key Holder
PMKR0Name->PMKR1Name->PTK
MSK or PSK
---------------------------------------------------------------
R0KH
R0KH-ID
Derives PMKR0
Derives PMKR1s
----------------------------------------------------------------
R1KH R1KH
R1KH-ID R1KH-ID
Derives PTK Derives PTK
----------------------------------------------------------------
PTK key holder PTK key holder
BSSIDA BSSIDB
5.capability:
beacon/probe response: MDIE/RSNIE
6.initial association
association request/response
FT 4way handeshake
7.FT Protocol
A.FT over air
authentication request/reponse
re-association request/response
B.FT over ds
FT request /response
re-association request/reponse
8.FT Resource Request Protocol
A.FT over air
authentication request/reponse/confirm/ack
re-association request/response
B.FT over ds
FT request /response/confirm/ack
re-association request/reponse
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