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Some interesting side discussion here. I wanted to chime in to point out that HPKE is built upon the “primitives” of KEM and HKDF. As mentioned on the list, KEM is underway. I am also spearheading our effort reviving the <a href="https://bugs.openjdk.org/browse/JDK-8189808">HKDF
JEP</a> which has gone a bit stale. </div>
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HPKE is certainly something we’re looking into as well. Once the building blocks of KEM and HKDF are in place, HPKE will ramp up next. </div>
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<div>Subject: Re: RFR: 8297878: KEM: Implementation</div>
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<div>Date: Thu, 13 Apr 2023 21:31:43 +0100<br>
From: Stephen Farrell <stephen.farrell@cs.tcd.ie><br>
To: Xue-Lei Andrew Fan <xuelei@openjdk.org>, security-dev@openjdk.org<br>
<br>
<br>
Hi,<br>
<br>
Apologies for the interruption from the sidelines but I<br>
have a query if that's ok.<br>
<br>
Is there any relationship between this work and RFC1980<br>
which defines HPKE, being a way of encrypting to a public<br>
value using a KEM?<br>
<br>
Reason to ask is HPKE is a mechanism that'll be needed for<br>
TLS Encrypted Client Hello and the MLS protocol, so it'd<br>
be a fine thing if these additions were suitable for that<br>
too.<br>
<br>
Cheers,<br>
S.<br>
<br>
PS: I implemented HPKE for OpenSSL so if there's interest<br>
in supporting that here too, I'd be happy to help a bit.</div>
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