Secret key Questions regarding expiration and backing up

[Daniel Kahn Gillmor]

On Fri 2016-10-14 19:16:45 -0400, Andrew Gallagher wrote:

> my understanding is that a copy of some public key information (such
> as expiry dates) is kept in the corresponding secret key store, and
> this will be updated when the public key is edited.

This is exactly correct.  see:
https://tools.ietf.org/html/rfc4880#section-5.5.3

   The Secret-Key and Secret-Subkey packets contain all the data of the
   Public-Key and Public-Subkey packets, with additional algorithm-
   specific secret-key data appended, usually in encrypted form.

Regards,

        --dkg
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