%% You should probably cite draft-ounsworth-cfrg-kem-combiners-05 instead of this revision. @techreport{ounsworth-cfrg-kem-combiners-04, number = {draft-ounsworth-cfrg-kem-combiners-04}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ounsworth-cfrg-kem-combiners/04/}, author = {Mike Ounsworth and Aron Wussler and Stavros Kousidis}, title = {{Combiner function for hybrid key encapsulation mechanisms (Hybrid KEMs)}}, pagetotal = 14, year = 2023, month = jul, day = 8, 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.}, }