Hi Guilin, 
1) Yes, it is the very fresh 
https://datatracker.ietf.org/doc/draft-kampanakis-ml-kem-ikev2 which has not 
been discussed in the WG yet and introduces ML-KEM (to be standardized by NIST 
in 2024) to IKEv2 by using RFC 9370. 
2) No. https://datatracker.ietf.org/doc/draft-kampanakis-ml-kem-ikev2/ has 
TBD35 and TBD36 identifiers for ML-KEM-768 and ML-KEM-1024 as placeholders 
right now. 


-----Original Message-----
From: IPsec <[email protected]> On Behalf Of Wang Guilin
Sent: Thursday, December 7, 2023 10:44 PM
To: [email protected]
Cc: Wang Guilin <[email protected]>
Subject: [EXTERNAL] [IPsec] Supporting PQ-KEM algorithms for Multiple Key 
Exchanges in IKEv2 (RFC9370)

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Dear all,

Newly published RFC 9370 describes how to extend IKEv2 to allow multiple key 
exchanges for IPSec. https://datatracker.ietf.org/doc/rfc9370/

Naturally, this is a very important step for the PQ migration of IKEv2 and 
IPSec.

The documents also abstractly defines 6 PQ-KEM algorithms that can be used for 
the purpose above. Namely,

             +-- Transform ADDKE2 ( ID = PQ_KEM_1 )
             |
             +-- Transform ADDKE2 ( ID = PQ_KEM_2 )
             |
             +-- Transform ADDKE3 ( ID = PQ_KEM_1 )
             |
             +-- Transform ADDKE3 ( ID = PQ_KEM_2 )
             |
             +-- Transform ADDKE5 ( ID = PQ_KEM_3 )
             |
             +-- Transform ADDKE5 ( ID = NONE )

My questions here are:

1) Is there any available standard draft that defines those PQ-KEM algorithms 
concretely?

2) Also, has any algorithm IDs have been reserved for future PQ-KEM due to 
cryptographic agility consideration?

Best regards,

Guilin

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