On Tue, 15 Oct 2013 17:37:54 -0700
Leo Vegoda <[email protected]> wrote:

> > They get backed up when they back up their system.  
> 
> You seem to have ignored the word "securely" in that sentence. And
> anyway, most people don't backup their systems at all. 

Here is, I hope, a better answer to your question 'How are keys securely backed 
up' , which I now understabd better:

That is handled by the underlying program you are using to encrypt your mail, 
and so has nothng to do with this proposal directly - it's implementation 
dependent. Out of scope.

For example, here I have Claws-Mail with gnupg installed in a plugin. Gnupg 
stores (or Claws-Mail tells it to store) its keys in a little database, that is 
encrypted on disk, with a passphrase. So claws mail must have some way to 
access that, store keys, etc. Since that program would have to understand both 
'default-deny' and whatever its interface to gnupg is, it should be able to 
store keys in the same way for this. And use whatever means are available to it 
in Claws-Mail for backup. Or on the system.

-Mike
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