On 7 Dec 2024, at 13:58, Werner Koch via Gnupg-devel <gnupg-devel@gnupg.org> 
wrote:
> 
> Some people obviously want to have this
> covert channel in signatures.

Which people? Werner, this is a very serious allegation. If you’re not willing 
to name names and provide receipts, I would strongly advise you to withdraw it.

As discussed previously on the openpgp mailing list, there are already 
countless places in the wire format that an adversary could use for a covert 
channel, and I’m not aware of any implementation (including gnupg) that 
attempts to close these channels, perhaps because doing so would be a rich 
source of interop failures. It would be counterproductive for an adversary to 
introduce salted signatures for this purpose, as doing so would only draw 
attention for little further benefit.

Please let this be the end of it.

Thanks,
A
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