The Pre-Shared Key Modes of HPKE

ePrint Report: The Pre-Shared Key Modes of HPKE

Joël Alwen, Jonas Janneck, Eike Kiltz, Benjamin Lipp

The Hybrid Public Key Encryption (HPKE) standard was recently published as RFC 9180 by the Crypto Forum Research Group (CFRG) of the Internet Research Task Force (IRTF). The RFC specifies an efficient public key encryption scheme, combining asymmetric and symmetric cryptographic building blocks.
Out of HPKE’s four modes, two have already been formally analyzed by Alwen et al. (EUROCRYPT 2021). This work considers the …

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