Changing expiration time of subkeys

[taurus]

Hi,
On 6 January 2010, at 05:34, Daniel Kahn Gillmor wrote:

> Hi taurus--
>
> On 01/05/2010 08:13 PM, taurus wrote:
>> I am trying to change the expiration time of 2 sub-keys with no  
>> success.
>> I edit the main key and with command expire I selected the uid(s)
>
> sub-keys are not bound to any particular uid ("user id"), but rather  
> to
> the primary key itself.  selecting any particular uid shouldn't have  
> any
> effect on any particular subkey.

That was my mistake, I selected uid's and not the key.
I succeed to change the expiration date of the subkeys when I use the  
'key 1' and 'key 2' command. Before I was using only 1,..2,...

>
> i think the usual recommendation is to not bother updating expiration
> dates on subkeys; just make a new subkey with the intended usage  
> flags,
> and set a new expiration date.  This should work fine for both  
> signing-
> and encryption-capable subkeys as long as you re-publish your entire
> OpenPGP cert to the keyservers after adding the subkey, and your
> correspondents know how to update their keyrings.

I understand this.
>
> is there a reason that you need to keep any particular subkey in use?

This key I use in private and mostly with family.

> hth,
>

Thank you very much.