Score:1

Forward-Secure AKE based on post-quantum KEM?

gb flag

I am looking for authenticated key exchange protocols (AKE) based on a generic key encapsulation mechanism (KEM) and providing full/perfect forward secrecy. Optionally, the protocols should offer external anonymity. The idea is to plug into the protocol an existing post-quantum KEM such as CRYSTALS Kyber or SABER.

My research brought me to the following protocols, but which are not totally matching the above-mentioned requirements:

sa flag
You may want to define full/perfect forward secrecy, figure out why (if?) the generic 3-kem construction (your second construction, as used by Kyber) does not achieve it, and then figure out if you care.
rozbb avatar
br flag
Not a complete answer, but you may want to look into the [IKE](https://link.springer.com/content/pdf/10.1007/3-540-45708-9_10.pdf) protocol framework. It looks like some variants provide PFS. It's stated in terms of DH, but [Pei14](http://link.springer.com/10.1007/978-3-319-11659-4_12) shows an IKE-like that works with just CPA-secure KEMs. Please update if you find an answer!
Score:0
in flag

There is one post-quantum AKE with forward secure, which was proposed at EuroCrypt 2015.

This protocol uses noise flooding technique + Ding's RLWE reconciliation-based key exchange to construct a forward-secure post-quantum AKE, as claimed by authors

The security is proven in the Bellare-Rogaway model with weak perfect forward secrecy.

rozbb avatar
br flag
These aren't generic over KEMs though
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