Security of ssh key passphrases - i.e. where to save them?

[Colin Law]

On Sun, 18 Aug 2024 at 13:00, Ralf Mardorf via ubuntu-users
<ubuntu-users at lists.ubuntu.com> wrote:
>
> I regularly receive blackmail emails containing my passphrases, which
> are impossible to guess and which I actually use.

In that case you must be doing something very wrong.  I have never,
ever, had such an email, or anything even similar.

Colin L.