Now that draft-ietf-emu-eap-tls13 and draft-ietf-emu-rfc5448bis has been 
adopted, I think it is time to start discussing the remaining things that the 
working group has been charted to do.

I think Perfect Forward Secrecy (PFS) and privacy are very important targets 
for the group. RFC 7258 (Pervasive Monitoring Is an Attack) requires protocols 
to mitigate pervasive monitoring, when possible. The assumptions from when 
EAP-AKA was designed have clearly not stood the test of time, IMSI catchers are 
regularly sniffing cellular identities and attacks on the manufacturers of SIM 
cards have opened up for large scale pervasive monitoring.

draft-ietf-emu-rfc5448bis shows that mitigating pervasive monitoring by adding 
PFS to EAP-AKA is possible and achievable. As it is well-written, I think it 
should be the basis for the working group’s work on mitigating pervasive 
monitoring of EAP-AKA. 3GPP has already specified a solution called SUCI that 
achieves privacy by encrypting subscriber identities, thereby mitigating the 
IMSI catcher form of pervasive monitoring. I think draft-ietf-emu-rfc5448bis 
should be updated so that it refers to the 3GPP SUCI solution for encrypting 
subscriber identities. The use of identity protection should at least be 
strongly recommended.

Cheers,
John

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