%% You should probably cite rfc9180 instead of this I-D.
@techreport{irtf-cfrg-hpke-12,
    number =    {draft-irtf-cfrg-hpke-12},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-irtf-cfrg-hpke/12/},
    author =    {Richard Barnes and Karthikeyan Bhargavan and Benjamin Lipp and Christopher A. Wood},
    title =     {{Hybrid Public Key Encryption}},
    pagetotal = 107,
    year =      2021,
    month =     sep,
    day =       2,
    abstract =  {This document describes a scheme for hybrid public key encryption (HPKE). This scheme provides a variant of public key encryption of arbitrary-sized plaintexts for a recipient public key. It also includes three authenticated variants, including one that authenticates possession of a pre-shared key and two optional ones that authenticate possession of a key encapsulation mechanism (KEM) private key. HPKE works for any combination of an asymmetric KEM, key derivation function (KDF), and authenticated encryption with additional data (AEAD) encryption function. Some authenticated variants may not be supported by all KEMs. We provide instantiations of the scheme using widely used and efficient primitives, such as Elliptic Curve Diffie-Hellman (ECDH) key agreement, HMAC-based key derivation function (HKDF), and SHA2. This document is a product of the Crypto Forum Research Group (CFRG) in the IRTF.},
}