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Combiner function for hybrid key encapsulation mechanisms (Hybrid KEMs)
draft-ounsworth-cfrg-kem-combiners-04

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Expired & archived
Authors Mike Ounsworth , Aron Wussler , Stavros Kousidis
Last updated 2024-01-09 (Latest revision 2023-07-08)
RFC stream (None)
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Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

The migration to post-quantum cryptography often calls for performing multiple key encapsulations in parallel and then combining their outputs to derive a single shared secret. This document defines a comprehensible and easy to implement Keccak- based KEM combiner to join an arbitrary number of key shares, that is compatible with NIST SP 800-56Cr2 [SP800-56C] when viewed as a key derivation function. The combiners defined here are practical split- key PRFs and are CCA-secure as long as at least one of the ingredient KEMs is.

Authors

Mike Ounsworth
Aron Wussler
Stavros Kousidis

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)