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RFC 9807
Title: The OPAQUE Augmented Password-Authenticated Key
Exchange (aPAKE) Protocol
Author: D. Bourdrez,
H. Krawczyk,
K. Lewi,
C. A. Wood
Status: Informational
Stream: IRTF
Date: July 2025
Mailbox: [email protected],
[email protected],
[email protected],
[email protected]
Pages: 73
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-irtf-cfrg-opaque-18.txt
URL: https://www.rfc-editor.org/info/rfc9807
DOI: 10.17487/RFC9807
This document describes the OPAQUE protocol, an Augmented (or
Asymmetric) Password-Authenticated Key Exchange (aPAKE) protocol that
supports mutual authentication in a client-server setting without
reliance on PKI and with security against pre-computation attacks
upon server compromise. In addition, the protocol provides forward
secrecy and the ability to hide the password from the server, even
during password registration. This document specifies the core OPAQUE
protocol and one instantiation based on 3DH. This document is a
product of the Crypto Forum Research Group (CFRG) in the IRTF.
This document is a product of the Crypto Forum Research Group of the IRTF.
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It does not specify an Internet standard of any kind. Distribution of
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