GPG smartcard shrinks in size
gniibe at fsij.org
Tue Aug 9 02:05:11 CEST 2016
On 08/09/2016 07:09 AM, Cannon wrote:
> Using the OpenPGP Smartcard V2.1 used to store 4096 key. Then was used
> to store 3072 length key for short time. Problem is that I am unable to
> use it for 4096 keys anymore. How to reset card so I can use it again
> for 4096 key?
No worries. I think that you can just generate keys of 4096 or put
keys of 4096 by keytocard.
OpenPGP Smartcard supports multiple key length. Since the card
protocol only supports a single information of key length per key, a
card looks like as if it only supports a specific key size. (There is
no way in the protocol to represent multiple key length information.)
When a user invokes "generate" or "keytocard" command, GnuPG will
adjust the key attribute of a card to a specific size of key length.
Once it is generated or written by keytocard, you will see it's 4096.
Or, do you have a specific problem when you say "unable to use it for
4096 keys anymore"? Please describe the problem.
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