On Wed, 4 Feb 2026 23:10:57 GMT, Xue-Lei Andrew Fan <[email protected]> wrote:

> > other groups will always be negotiated before them since they are at the 
> > end of the list.
> 
> I don't think we can come to this conclusion. Per TLS specification, at the 
> end of the list, does not mean it will not be used. That's the reason why the 
> specification is defined so. Otherwise, just one entry is fine.

These extremely large groups should really be opt-in as they are almost never 
used in practice and require additional resources to process, so the server 
should opt-in. I have found no evidence of them being used anywhere - do you 
have any references? In general, DHE groups and cipher suites are becoming 
legacy and I expect the JDK to eventually deprecate more of them as we move 
forward in the next few years.

The CSR's purpose is to document compatibility risk.

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PR Comment: https://git.openjdk.org/jdk/pull/29577#issuecomment-3855431753

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