rfc9820v4.txt		rfc9820.txt
	skipping to change at line 194 ¶		skipping to change at line 194 ¶
	backend AAA infrastructure when EAP pass-through mode is used, which		backend AAA infrastructure when EAP pass-through mode is used, which
	will place the EAP server in the AAA server that contains the		will place the EAP server in the AAA server that contains the
	information required to authenticate the EAP peer.		information required to authenticate the EAP peer.
	The protocol stack is described in Figure 2. CoAP-EAP is an		The protocol stack is described in Figure 2. CoAP-EAP is an
	application built on top of CoAP. On top of the application, there		application built on top of CoAP. On top of the application, there
	is an EAP state machine that can run any EAP method. In the case of		is an EAP state machine that can run any EAP method. In the case of
	this specification, the EAP method MUST support key derivation and		this specification, the EAP method MUST support key derivation and
	export as specified in [RFC5247]: an MSK of at least 64 octets and an		export as specified in [RFC5247]: an MSK of at least 64 octets and an
	Extended Master Session Key (EMSK) of at least 64 octets. CoAP-EAP		Extended Master Session Key (EMSK) of at least 64 octets. CoAP-EAP
	also relies on CoAP reliability mechanisms in CoAP to transport EAP:		also relies on CoAP reliability mechanisms to transport EAP: CoAP
	CoAP over UDP with Confirmable messages [RFC7252] or CoAP over TCP,		over UDP with Confirmable messages [RFC7252] or CoAP over TCP, TLS,
	TLS, or WebSockets [RFC8323].		or WebSockets [RFC8323].
	+--------+ +--------------+ +----------+		+--------+ +--------------+ +----------+
	| EAP | | EAP | | AAA/ |		| EAP | | EAP | | AAA/ |
	| peer |<------>| authenticator|<----------->|EAP server|		| peer |<------>| authenticator|<----------->|EAP server|
	+--------+ CoAP +--------------+ AAA +----------+		+--------+ CoAP +--------------+ AAA +----------+
	(optional)		(optional)
	<---- SCOPE OF THIS DOCUMENT ---->		<---- SCOPE OF THIS DOCUMENT ---->
	Figure 1: CoAP-EAP Architecture		Figure 1: CoAP-EAP Architecture
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